Jump to content
SAU Community

Recommended Posts

2500km after the last oil change and I've just had to add 1.5l of oil to get back up to the "full" mark. That sounds pretty wrong to me but there are a few sources online that say 1L/2500km is normal for most cars and I found one that reckons the vq25de specifically can use 0.5L/1000km which means mine is normal, What have you guys experienced?

39 minutes ago, GTSBoy said:

That's "normal" in dealer speak, where they don't want to have to do any warranty work. I never check the oil in my Neo25 in the 10000km between services. If it ever starts using oil, I might be in trouble!

If you never check it how do you know it isn't low on oil?

41 minutes ago, Ottdurr said:

If you never check it how do you know it isn't low on oil?

Because it doesn't use oil. I do the same with my daily cars, they don't use oil, so I don't check. Once you get a idea the engine doesn't use any noticeable amount of oil you can stop checking!

Im your case you car burns a fair bit if oil, so you need to keep an eye on it. To me that's a mental amount of oil, but really it's not like you are going to rebuild the engine just because of that

 

  • Thanks 1

That's high oil consumption. Worth trying to find out where it's going. Oil you are using could be too thin also...

Checking oil every few weeks as a minimum is a good habit to get into, weather the engine looses oil or not. It's an expensive repair if it runs out.

Early Holden Barinas are “allowed” according to golden to use 3.5l per 10k they hold 3.7l and service intervals were every 15k. So if unchecked it could use all the oil before the next service!?‍♂️

2 hours ago, RBW49N said:

Early Holden Barinas are “allowed” according to golden to use 3.5l per 10k

Not the Suzuki ones, surely? That would have to be the shitty Spanish built Opel ones, and if so, no-one would cry if/when they died. That's just natural selection.

  • Haha 1

My VQ25DET was needing about 0.5-1L of 0W-40 per 5000kms, but the cam cover gaskets have been changed (pink slip fail) so hopefully that consumption will reduce (not that the garage floor showed more than the occasional drop of leakage..).

The VQs came at the start of the era when OEMs were staring to use very thin piston rings and other design/spec choices like low ring tension, intended to reduce fuel consumption. Subaru motors got the worst of it, because there's nothing worse than a piston ring design that allows more oil to pass, on a horizontal cylinder.

On 27/12/2019 at 11:36 AM, GTSBoy said:

Not the Suzuki ones, surely? That would have to be the shitty Spanish built Opel ones, and if so, no-one would cry if/when they died. That's just natural selection.

Yeah the shit Euro ones not the quality Japanese ones

On 27/12/2019 at 4:04 PM, GTSBoy said:

The VQs came at the start of the era when OEMs were staring to use very thin piston rings and other design/spec choices like low ring tension, intended to reduce fuel consumption. Subaru motors got the worst of it, because there's nothing worse than a piston ring design that allows more oil to pass, on a horizontal cylinder.

My Pooparu hit 256,000 km (EJ255), and yeah it does burn an alarm amount of oil for me (almost 1L per 10,000 km). My GT-R doesn't burn oil and it's 1990 model.

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


  • Similar Content

  • Latest Posts

    • Keen to see the turbosmart data, to date I've only seen negative things in terms of response for them. Very small sample size though.     Hawkins is a big advocate in his videos of the larger rear housings. I managed to make similar power with a lower spec motor on the smaller .8 rear, keeping decentish spool.  The people he works with now are big power cars compared to mine though, mine really is setup to drive around and enjoy.  I don't have any back pressure monitoring though, so couldn't say if its good or bad on my car, just that it does what I want it to do.   Future I want a higher compression more cubes motor to give a bit more bottom end and hopefully the new g35-1150 gets me to the 850 rear comfortably.  But maybe I won't due to exhaust back pressure.
    • No, I refuse to buy their cheap ass crap! I do need to order a bunch of different nuts/bolts to refill my nut/bolt wall though. Maybe you could go for a walk through Bunnings for me? (Or send me some stuff from your work? )   I really struggle to work out how the US standardised to Metric in what the 70s or 80s, and yet, half a century later, there's been little done to actually bring it into fruition. It truly baffles me    On the whole Fastenal thing, I went reading their site (My god they sell a lot of varied stuff!), and it seems like it really depends what store you're near if you can walk in and just grab a few small things, or if that branch is primarily distribution with only a small window of "counter time" available (if at all). That definitely makes it harder, as move locations and it drastically changes your ability for success   For things like your M6x1.0, if you want to work on your own Skyline, and you also have a "home workshop" I'd recommend setting yourself up a small Nut/Bolt wall/section. It doesn't even need to be big at all. Most things depending on the diameter, will be a specific pitch, like the M6x1, M5x0.7 etc. Bigger bolts is mostly 1.5, except for a small number of things and that will come down to torque. From memory bolts for the brake calipers (and other things that need a lot of torque) will end up being a 1.25mm pitch. Save up a few dollars, and order a range of nuts/bolts. If you want to minimise cost a little, buy something like M6 x 40, and M6x70mm (1mm pitch) in both. In addition, buy yourself an M6x1mm thread chaser. That way you have long bolts that you can cut down to size, and then chase the threads out. Funnily enough, I find what I'd pay here for ordering 5 bolts, I can pay about 50% more and you'll get 100 of them.   If that doesn't quite work out due to space / ability to buy plenty up front, then each time you need some bolts, order 100 of what ever you're getting. Put them in clearly marked containers. Over a few years, you'll acquire plenty of different sizes, and will end up ordering less and less. And the cost for 100 bolts won't be much more than you paid for your 5 you needed to order anyway  Just takes a little planning ahead, by investigating what nuts/bolts you'll need, and ordering them before doing the job.     Edit: If it's also primarily for working on just the Skyline, for some reason my brain is screaming that at some point, either Nissan, Nismo, (Or possibly a third party) was selling a "kit" of every nut and bolt in a Skyline, purely for people restoring/rebuilding. It'd likely be quite expensive, but would give you every/any nut/bolt you need for stock/factory things. I'm not sure if it's still available, or even if it actually fully came to market, it's just something niggling in the back of my brain that you could look into further if that sort of thing interested you? (It might have been for the R32 GTR or something specifically too, and not just any Skyline)
    • 90lb/min @ 20psi is wonderful, not so much of a problem with the G35-1050's compressor efficiency (aside from how bad they roll back at higher pressure ratios).  The issue is more to do with the turbine's flow, which is why I'm not sold on going an even higher flowing compressor with the same turbine.  I'd say go back over Motive DVD's testing of the G35 1050 and Hawkins's comments regarding exhaust back pressure issues with it, I'd need to go back but I have in my head he went to the biggest hotside and ended up sacrificing a lot of spool (so it ended up behaving like a bigger turbo) and still had EMAP issues.  I've heard various other experiences along the lines of that. At this stage at least I rate all I've seen about Xonas (for transparency I've not used one directly, but I have spoke plenty with people who have) to have low exhaust restriction for the response they offer for any given setup - basically they allow the engine to breathe, which is good for the engine and makes making power a lot easier.  You arguably don't have to even push quite the same amount of airflow through an engine to make the same power if you don't have the bum plugged up with exhaust gas struggling to escape the engine due to an underflowing turbine.   In terms of reliability, to be fair I've had great luck with Garrett turbos as well - my GT3076R lasted forever, then I sold it and the next owner had no issues, then that car got sold and it was still going strong last I ever heard about it.  The trick is with the old GT-series turbos the compressors etc were no way near as efficient as what we have these days, it was almost hard to push them into severe overspeed situations without having a boost leak or something - and that is what often starts the failure situation.    In terms of your G35 I'm pretty sure you're running yours within sensible limits, something people with Xonas and Precision turbos aren't often so inclined to do.  The "compressor maps" are "Joe blogs ran 45psi through his 6466 so I can do the same" and built their setup to send it to the moon.  I've seen EMAP and compressor speed data where people have actually set that stuff up on Precisions and Xonas which have been run hard and the comp speed numbers are very very exciting at times - like I've seen 76mm Precisions run at rpm that you ideally shouldn't run a G35 1050 lol.   I know people who have run G-series Garretts hard and hard a failure, then replaced them with Pulsar turbos as a cheap "get it going" stop gap with the intent of doing a proper upgrade when THAT fails... and are still running the same thing.   Like anything, ymmv and it's not always to do with the quality or trustworthiness of said product. I've been provided with a bunch of compressor maps for Turbosmart turbos and will update my list based off that, they could prove to interesting reading and an interesting alternative as well.
    • Just cage it, call it a race car, and then fall in love with the chirp chirps through pit area!   Also, this is coming from someone with a completely locked diff...
    • I still have an old R32R left over from when they were a thing in the early 2000's. It was, for its time, done about right. But its time was 20 years ago.  I did try and update it a while back but it was cruelled by a (recommended) muppet of a tuna who couldnt tell his MAP from his TPS. The original spec was: Power FC, 700cc Sards, Nismo pump, 2860-5's, cams (Basically Poncam A's), Z32 AFM's and a half sorted oiling system. Thereabouts 430rwhp irrespective of what was done. So, yeah, very 1990's. I eventually got sick of it not being very refined and bought a Link G4 PNP with some 1000cc Bosch injectors. This was tuned badly and I put the car in the shed for a few years whilst I sulked and went and did other things. Ive come around to the idea of getting it going again so it has a new gearbox installed and some other minor things in the planning. So my questions are, variously (In the context of keeping the Link) What other sensors should I be running eg It has no wideband on it at the moment, nor fuel pressure. $? Is it worth chucking the old ignition system (ignitors etc) for new ignition coils? $2k? Cam/crank angle sensors? Can keep the aircon? $? Anything else? Sorry to launch another what should I do with my car thread but, you know, what should I do with my car? Random photo for historical context.
×
×
  • Create New...