Jump to content
SAU Community

Does running rich cause oil to go dirty faster and cause fuel dilution?


Recommended Posts

I noticed my oil on my rb25 stays gold for about 3,500km roughly. Then goes light brown after that. Probably around 4,500 mark it goes dark brown (this is me driving normally with no / minimal pulls as i blow black smoke when i boost) (when I drain the oil it's black at 5,000 no metal shavings though in the filter or oil)

I noticed now that it's been under 3,000km and it's dark brown. I think it's because I've been doing a few pulls more than usual (pulls means, in first gear going up to 5000-7000 rpm)

My oil doesn't smell like fuel at all, and isn't causing me any issues but I don't want to get bearing wear (yes I'll be getting my car tuned soon to)

I don't know if it's just me or if my oil is a bit thinner (I'm comparing brand new oil to oil that has roughly 2,500km from memory so might not be a good comparision.

Edited by silviaz
Link to comment
Share on other sites

Posted (edited)
1 hour ago, Murray_Calavera said:

Can we not just turn the boost down until you get the car tuned? 

I'm not sure how to do it, I'd rather leave it to the tuner, the thing is I think it probably technically runs rich when I drive normally as well I just don't blow smoke (unless I do a hot start a bit of black smoke leaves the exhaust, but never have smoke on cold start)  

Edited by silviaz
Link to comment
Share on other sites

Posted (edited)
2 hours ago, Murray_Calavera said:

What boost controller/ECU are you using? 

I'll double check the model. I also got told though from my mechanic I can plug it out as well and I'll go back to wastegate pressure or something like that? 

Edited by silviaz
Link to comment
Share on other sites

1 hour ago, silviaz said:

I'll double check the model. I also got told though from my mechanic I can plug it out as well and I'll go back to wastegate pressure or something like that? 

If you disconnect the line going to your wastegate, you'll run spring pressure. 

Link to comment
Share on other sites

7 hours ago, silviaz said:

because I've been doing a few pulls more than usual (pulls means, in first gear going up to 5000-7000 rpm)

(yes I'll be getting my car tuned soon to)

You shouldn't be doing anything but driving the car to the tuner, off boost.
Doing this could well be within the boundries of comparing:

"Does my oil go black faster"
and
"Do the pistons usually stay inside the engine?"

  • Like 3
  • Haha 1
Link to comment
Share on other sites

13 hours ago, silviaz said:

I'll double check the model. I also got told though from my mechanic I can plug it out as well and I'll go back to wastegate pressure or something like that? 

Unplugging the wastegate solenoid should be wastegate pressure. Do not unplug the vacuum lines, leaving it at atmosphere will cause a big overboost event.

Link to comment
Share on other sites

15 hours ago, Kinkstaah said:

You shouldn't be doing anything but driving the car to the tuner, off boost.
Doing this could well be within the boundries of comparing:

"Does my oil go black faster"
and
"Do the pistons usually stay inside the engine?"

"Why do my pistons have little dimples in them kind of like a golf ball?"

"Why does my pistons have a huge hole in it"

"Why did my valves burn out in my head"

"Why did my turbo get cooked?"

  • Haha 1
Link to comment
Share on other sites

6 hours ago, joshuaho96 said:

Unplugging the wastegate solenoid should be wastegate pressure. Do not unplug the vacuum lines, leaving it at atmosphere will cause a big overboost event.

Not the wastegate solenoid, he was saying the actual boost controller. The vacuum line going to the boost controller he said just to tie that up so I don't have a boost leak.

Link to comment
Share on other sites

4 hours ago, silviaz said:

he was saying the actual boost controller

And that would be wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong

  • Like 1
  • Haha 1
Link to comment
Share on other sites

Posted (edited)
14 hours ago, GTSBoy said:

And that would be wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong wrong

Alright, I believe you 😂 Many my original mechanic has gotten a lot of things wrong lol.

Edited by silviaz
Link to comment
Share on other sites

This is a car that should not be being driven around. Also, an untuned car running rich due to mods is... never a thing. Also, driving an untuned car long enough that you're inspecting the oil is all sorts of wrong.

You are speedrunning the Car-Darwin awards here dude.

I get it, you want to have fun and be cool in shiny toy.

stop-it-get-some-help.gif
 

Link to comment
Share on other sites

Posted (edited)
19 hours ago, Kinkstaah said:

This is a car that should not be being driven around. Also, an untuned car running rich due to mods is... never a thing. Also, driving an untuned car long enough that you're inspecting the oil is all sorts of wrong.

You are speedrunning the Car-Darwin awards here dude.

I get it, you want to have fun and be cool in shiny toy.

stop-it-get-some-help.gif
 

All valid. It's tuned but a poor tune lol. I'm only inspecting the oil because I did more pulls that usual as mentioned. If I don't do any pulls it stays clean for a decent amount of time, but I will get it fixed! It's just taking forever because everyone is busy.

Edited by silviaz
Link to comment
Share on other sites

9 minutes ago, silviaz said:

It's tuned but a poor tune lol.

and this

On 8/8/2024 at 3:58 PM, silviaz said:

i blow black smoke when i boost

Just don't add up for me. 

What is the go with the tuning on your car, who tuned it? Was it put on a dyno?

Also, I'm still waiting to find out what type of ECU and boost controller you have lol.

Link to comment
Share on other sites

3 hours ago, Murray_Calavera said:

and this

Just don't add up for me. 

What is the go with the tuning on your car, who tuned it? Was it put on a dyno?

Also, I'm still waiting to find out what type of ECU and boost controller you have lol.

That's the thing I have no idea who tuned it and not sure if it was dynoed, and is why I need to get it tuned because I don't have paperwork. In regards to the ecu, I checked that a while back and I couldn't find it lol, it is aftermarket though my last mechanic told me. Anyhow I'll just leave it for the tuner. 

Link to comment
Share on other sites

1 hour ago, silviaz said:

I have no idea who tuned it and not sure if it was dynoed

Ah ok. It would be a lot more accurate to simply say, the car has not been tuned. 

Blowing black smoke on boost is so crazy far from any state of 'tune' that I would not even call it poorly tuned. 

Do you know where the ECU lives? It takes about 10 seconds to access the ECU and we could solve this mystery.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share



  • Similar Content

  • Latest Posts

    • Thanks mate yeop be good ! Understand the kid thing for sure lucky mines a bit older and I can bring him over etc he gets treated like a rockstar 😁 go the RB   yeop wont be doing this forever prob so why not 100% everyones always been good but going back this year was different and more interaction and def more support Def thought about changing uprights etc waiting for @Komdotkomto sort out whats needed for those and do the r & d haha  but yeah hard thing for gtst nothing direct fit as all made for GTR which is slightly diff but moving to the r35 gtr bearing will be big improvement - its just budget allocation as its a $10K to $30K exercise dependent on how mild or wild you go and seems something always comes up - ontop of the crazy travel / racing 
    • Great write up. Always good to record everything to look back in the future and reminisce. How good is the motorsport community with helping out when needed.  Should be pretty proud of the result you achieved for the little amount of laps you've done there. Also good you have the drive to do better too ,I'm sure a 1.29 will happen next year.  You thought about a front end upgrade? New upright and arms with better geometry also allow a better bearing your not replacing every time. 
    • Cracker read mate! Would be nice to meet you soon, probably when the kids are a bit older and I'll take them along to see the world's fastest 4 door skyline 
    • OK WTAC '24 adventures - dont know if anyone wants to hear it past whats been put out already but hey I'll put some of it out anyway and try give some insight   Summary : end result - 6th open class and 1.31.1 lap   How'd we get that   Following the above after Aus Time Attack at Winton and driving the car up to Sydney to store the rb2.8 went in so got to fly over to Sydney the Monday before the event     The car was with Greg at Sydney Composites workshop - we got straight to work that arvo changing out the front wheel bearings as they flog out allll the time.   A new bonnet was being made and my goodness its nice !  also new bigger canards were put on as I was the first one to trial the new canards and after testing from others bigger basically proved to be better rather than my initial cut down version.   We also did ride height changes and setup was there till 1am Wed morning but got it all done     A big focus this year was to get me some seat time on SMP - laps for me = good so has an extra prac Wed morning to roll around so up at 6am to track     Basically 2 quick sessions and 3 'hot laps' we quickly worked out that the custom red / golds  MCA's I had in werent valved strong enough to hold up all the new aero at these speeds, we suspected at Winton but were hoping... but alas nope. Also the tyres I had on from Winton were gone and just down right dangerous haha   So... some appropriately valved MCA golds were sources from Canberra and driven up straight to the track for me to borrow and retro fitted with my current stuff and some better used tyres put on from Xtreme.     Got into the arvo where I had to take more prac spot so took it - we got 2 x goes at a lap but the setup was wrong and was porposing like crazy so aborted each one but we got it sorted correctly after but didnt get to go out again   WTAC official prac Thurs   Did 3 sessions of 1 lap each time no power - suspension better few tweeks here and there and got to get a little bit of a groove back all seemed OK   We found the car getting back to some understeer because we still had the old rear suspension in and it couldnt handle the aero load but had no options so had to work around it ... it ended up scraping the rear diffuser that sits quite away off the ground that how much it was !   WTAC - Competition day 1     Morning Session - usually the best - wound it up had a crack was good but safe and not the max from a push p.o.v 1.31.6   The wind then picked up as did temp went out just for a lap on no power for second session did a solid 1.33 totally sat out the last session as no point due to track conditions   WTAC - Competition day 2   Morning session - full send !  - ran it hard down the front straight as I got to T1 turn in car faulted and switched off - tried to do another lap after resetting tyre pressures and fuel but was not working properly and got blocked and then had red flag anyway haha - bad   Long story short - the balancer had gone and as well took the DBW with it     Organized chaos ensued - between my team - Dahtones and Herman and just about everyone else we got everything needed and a new 1500 ATI put on - luckily thee was a Bosch motorsport stand in trader ally and they let us take the DBW they had on display to put on my car !  legends   So at this point we've only done 1 real lap , missed the good session in the morning missed session 2   Pit walk was upon us and is always so busy but great and met @soviet_merlin and others we also try to get as many kids in the car for fun and photos as possible + meet people     Session  3 - last one - wind was up, track was horrible didn't matter had to go - launched it as good a I could. We changed setup to leave the car in 5th gear into front straight so I didnt have to change down and worked well just held it flat max powas and max rpm - 282 kmph and 217kph around T1 (this has to improve alot )was up 1.2 secs into T8 despite mistakes and as previously said tyres just started going to mush - I couldnt get it around T8 properly lost most of my time picked more up with last 3 corners ended up 5.5 tenths up on previous good lap for new PB but missed out on top 5 by 6 tenths Still not my best lap I shouldve had it to make top 5 but didnt... thats racing     A positive takeaway from an effing tough go at it this year - netting only 2 x hotlaps is both my 1.31 laps combined optimally gave a 1.285 - now I know I'll never be perfect but with a 2.6 sec difference - that means its there it just comes down to consistency to bring that down into an achievable 1.29ish   Our best endeavors to have good seat time and a well sorted car illuded us this year but still got it done as best we could   Good mate made me take a pit pic in front of the car which I look at now and is good as you just dont know I might not be back, or I might !     And then after watching the wild Top 5 shoot out you get to pack up starting at 9pm so pack it all up properly for long trip home   We had a sleep and then yeop ... a near 4 day drive back to Perth. Look I dont actually mind the drive - its not great but its not horrible - but the toll it takes on you after or before competition isnt optimal and neither is the time it takes to do - maybe another option but they are few and expensive I tell you what im basically an international and would be ALOT easier to compete at WTAC if I lived anyway but W.A 😆   All in all hard work, solid result on paper but even if I was still 6th I would've like to at least be in the 1.30s and as close as I was and maybe due to circumstance it still says a 1.31 - which isnt sh*t just not the best .... the W.A crew that comes with me is awesome, im appreciative of getting to work with some of the best on top of that with Brad and some help from the pro drivers, Xtreme and others   So back home back to it - full set of MCA golds going in now which was on the cards anyway and a new 'proper' race radiator to keep it cooler   See what comes up next to race at or in ... that I dont know  
    • Acostal came through with a new bracket which should free up some adjustment arm and hit my target of -3.7° camber and 7° caster. (old black, New silver) fitted up and you can see how much shorter it makes the relative length of the caster rod as well as swinging it slightly to free up some misalignment in the bearing   with Caster maxed out short this is how the wheel sits on the car in the air While I was at it, I pulled the wheels off the car to inspect the suspension and noticed this lovely gash. A pity becasue these tyres, while on wear bars, would have had at least one more dry grip day in them. Have a set of AD09 to try out next which I expect will be slower than the CR-s or AR-1 were but better in the rain with a longer life?
×
×
  • Create New...