engine oil

[croat]

Im thinking of changing my engine oil to something fully-synthetic for my car... I currently use genuine nissan oil as motor is relatively standard but will be changing now as the mods are fitted. What is the best oil to use for this car, price is not important. The grade of the nissan oil i currently use is 7.5 W-30 (not sure what it really means)...

Cheers!

[Kaido_RR]

I use Mobil 1 (fully-synthetic), i cant say anything bad about the oil. I think the ture test of the oil was when i blow my oil line (turbo -> engine) lost about 4L of oil and was driving the car with oil light on and oil pressure at 0 (dont ask ) after fixing the line and putting refilling the car with Mobil 1, the engine was OK, my mech said i was very lucky and he didnt think there was a chance in hell my engine would have made it.

so my moneys with Mobil 1 i also hear Redline is good 2

[croat]

Which mobil 1 is it? There are a few of them... what is the grade?

[Kaido_RR]

not sure :confused: i will ask my mech when i go see him again all i know is Mobil 1 FS

[silver gts-t]

theres only one MOBIL 1, its 5w-40 i think 50, cant remember

others are mobil S

[croat]

what does 5-40 and that all mean? which one is thinner?

[APA]

i am about to use valvoline vr1 in my car it is 10w-40 so we shall see how that goes

adrian

[SLY33]

the numbers 5w40 etc are viscosity ratinigs of the oil. Viscosity is an internal property of a fluid that offers resistance to flow- it basically refers to how thick or thin the oil is.

We use multi viscosity oils, the first number is the cold viscosity, the second number is the warm viscosity. As our turbo engines require lots of oil flow to our turbos we like oils that are thin when cold (a low number like 5, means the oil flows very well when cold). The "W" following the 5 in 5W40 simply means that the number preceding the 5 is a cold temperature rating that meets SAE requirements.

In one of my old 5litre Torana's id use a nice thick oil to try and reduce tappet noise, whereas a thick oil in an engine like an RB might not give enough flow to keep things happy.

personally i use motul 8100 fully syn 5w40 (~$65 for 5litres), over mobil one.

[thizzle]

hks synthetic

[Elithrar]

Mobil 1 comes in 5W-50, and 0W-40. The latter is the 'dealer' spec; can't buy it off the shelves. The former goes for about $65.

[lwells]

There is a long thread about the relative merits of Motul, Mobil1 and Castrol in the maintenance forum. Worth a read.

LW.

[Roy]

You can alsp get 15W-50, when my RB20 ticked over to 140,000kms i changed to the thicker grade oil just to ensure all was well. Upon looking at the internals i dont think the switch to thicker grade was needed.

http://www.mobil.com/USA-English/Lubes/PDS...bil1_15W-50.asp

[B33st]

mobil 1 comes in 0w-40, 10w-30, 5w50 and 15w-50 thats 4 different grades

[knore]

motul 300v chrono without a doubt

10w40

[leech_]

i put motul 4100 turbo light in like 100kms ago so i cant really notice anything different yet and probably wont but as long as it keeps the car healthy i will be happy

[Russco]

Guys, (not wanting to spark the my oil is better than your oil debate!!) I was speaking to the owner of one of Brisbane's largest tuning shops & it was interesting to hear his feedback on a number 8-900hp Jap powered drag engines that had been pulled down - bearings didn't last long on Motul (not the 300V Chrono), even less on Mobil 1 - recommended Castrol R.

[JAS-25T]

motul 300v chrono without a doubt

10w40

mother farken werd!

big ups to chrono 300v

[Zombie]

Guys, (not wanting to spark the my oil is better than your oil debate!!) I was speaking to the owner of one of Brisbane's largest tuning shops & it was interesting to hear his feedback on a number 8-900hp Jap powered drag engines that had been pulled down - bearings didn't last long on Motul (not the 300V Chrono), even less on Mobil 1 - recommended Castrol R.

I dont think there are many 800-900 hp drag cars on SAU.

End of the day I dont think there will be a largely noticable difference between fully synth oil for the purposes of the majority of cars here.

That being said, I have heard Castrol R is good, more expensive as well.

I run Shell Helix Ultra or whatever it is called.

Adam

[GZ R33]

Castrol Formula R 10w60

[r33fred]

I use Valvoline full synethic 10 w 50... Cold weight is 10 so is thin and runs freely on cold start up but more importantly the hot index rating of 50 is important for heat protection as turbo engines tend to run hotter than non turbo. Although Nissan reccomend a hot weight of 30 which to me seems far too thin.