Mobil 1 v Shell Helics Ultra

[Clint32]

Castrol formula R 0w/40 is all i use and it has always given good oil pressure and still looks good after 5000kms, the only prob is the price, retail is like $80 5L, i pay $55 trade so if you shop around and talk to the right people you should be able to get a good price.

[Chef_32]

I was told that i could just use Shell plus 15W-50 synthetic technology. Is the viscousity too high on this??? Opinions??

[Guest RedLineGTR]

the Nissan recommendation is 7.5-30w for a brand new engine from the manual. But since its hard to get 7.5 most people go for a max of 10w...u most commonly can get 5w-Xw..the lower the number the faster the oil can get flowing when the engine is started to protect all the components.

[R31Heaven]

This document is getting a bit on, but still is good reading, to give you an idea of how oils are made up

Oils aint oils

[ron]

im a MOTUL man so Motul for me.

as said earlier, mobil dont cope really well in temp department.

tries shell, much calmer but i could tell that it lacks in the power dept.

motul wont let you down, it hasnt let me.

"motul is so good, thats why i have it on the side of my car for

3 full years!"

[JimX]

Originally posted by hungry6

u ppls should not swap and change over different brand of oils wether synthetic or not. all oils are constructed different and behaves differently.

How are they constructed differently? How do they behave differently? I'm not talking about something fundamentally different like a 60 weight mineral oil mixed in 50/50 with a 5W-30 synthetic oil, I'm talking about similar oils (synthetics of similar viscosities whether different brands or not) with the old oil drained out completely. How does the 1% of the old leftover oil fundamentally interfere with the performance of the 99% of fresh oil?

[hippy]

thats what i was also thinking ..

[Jay95R33]

Just a quick update....

Been about a week with Shell Helix now, gave it a quick blat last night to see how it would handle the temps etc...

Oil temp went up higher than it has ever gone with the Mobil 1, and now when at idle the oil pressure gauge sits just above the 0 mark !!!

Cruising at 100 in 5th on flat ground when warm see's it sit under 2 on the factriy gauge now

I don't know if this is mega bad, but Mobil 1 never did this. And I've always been under the impression that good (factory limits) oil pressure is critical for an engine !

These are just my findings in comparing the two oils.

I'll be keeping an eye on it (temp and pressure) and if it doesn't stabilise within a week or 2 I'll be draining the oil and changing the filter and going for something else.

J

[JimX]

How hot was the oil before and after? Make sure the pressure gauge is working properly before casting judgement on the pressure, but temperature gauges usually don't go out of whack.

[Jay95R33]

It seems as though the factory pressure gauge is working OK.

It's still resonding at the normal speed.

Only had one problem with the gauge and that was when I first got the car over 2 years ago. It ended up being crappy oil that they used. I changed the oil 1 week after getting the car and the gauge hasn't missed a beat since.

It seems strange that it happend at the same time as the oil change (pressure drop - Helix).

The temp when giving it a boot full was ~10 degrees hotter than the Mobil 1 in the same conditions.

Like I said, I'll keep an eye on it and see how things pan out.

I'd like to give it more of a chance before I make my judgement

J

[Ronin 09]

jayson, i wouldn't be too worried. I've changed from Motul 300V to Mobil 1, and my oil pressures (on my aftermarket gauge) have been pretty stable, if not a touch lower with the Mobil 1. But admittedly the Mobil 1 is slightly lighter.

10 degrees of oil temp is not much at all. External conditions could easily cause this.

I have very little faith in factory oil pressure senders/gauges... mine has continually been up and down (i find that when i've been running for ages it tends to read alot lower), and i've had the original dash and a GTR dash in my car. I guess that it is the sender... :confused:

Give it a bit more time (go buy an aftermarket pressure gauge! )

[Guest RedLineGTR]

Good stuff Ronin. The best way to actually test is under the sam conditons. Had to be the same temp outside. How far did the run take place for etc. And a proper oil temp and oil pressure gauge is a must if want to make a comparission..or some kind of aftermarket management to log all the details and temps with certain condtions...allala.

[Jay95R33]

Yepp, I'll hold out and give it a chance before I drain it. Just really scary seening the oil pressure gauge so low Just a paranoid thing

BTW - just off topic a tad With an after market oil pressure gauge, how do you hook it up? I'm talking about mechanical one's, not the electrical ones..

I've got VDO boost and oil temp gauges up on the A pillar at the moment which I'll be moving down to the DIN space under the stereo, which means I can squeeze 3 gauges in..... So I'm looking at a VDO oil pressure gauge...

J

[Guest RedLineGTR]

one of my mates had some unknow oil in his car...had oil pressure problems. Then we put some new stuff in Shell Helix Ultra. for the first couple of weeks the pressure was funny...now for the past couple of weeks it steady and at the correct level from what he tells me. Cheers Rob

[Ronin 09]

Jay, i'm not sure if you can get mechanical oil pressure gauges? I guess you probably should be able to, but do you want 8bar or pressure going into the back of the gauge (i assume if it works the same way as a mechanical boost gauge)?

My electronic oil pressure gauge is tapped to one of the bolts holding the oil filter mount on the block. The sender then basically plugs into the back of the gauge

[Jay95R33]

Ahh cool - I just found the VDO catledog and they have mechanical oil pres. The reason why I'm leaning towards the mechanical is that the mech ones are about 300 degrees sweep, while the electrical ones are only about 140 degrees sweep

And since the other 2 gauges I've got are 300 degrees sweep I'd like to match them up.. But you made a good point about the pressure line going into the cabin...

Hmmm, more thinking to do

Either that, or VDO make a exhaust temp gauge that is 300 degrees sweep too Not sure on price though.

J

[Guest RedLineGTR]

think it is illegal to have one inside the cabin...do u really want the line to burst and get nice hot oil overyourself..

[wrxhoon]

i wouldnt use a mech oil pressure gauge if the line burst in the engine bay and u r not looking on the gauge all the time its goodbye engine , it doesnt long when u hear the bearings knock its to late . like redline gtr said its illegal as well to have oil line in the cab .

[Brody]

I just picked up 5 of mobile1 at autobarn for $55? so ill see how I go tomorrow when i change....

Quick question, mobile1 being 5w-50, isn't that going to be 2 thick when warmed up? Thicker = slower revs?

[Guest RedLineGTR]

thats why you see those full shic commadores and gemmies the the gauges on the outside...but prone to people stealing them