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Further to the comment about gulf 1 being a track oil. Can I ask why you say that? I'm not saying thats not correct but I want to know why you say it as the rep suggested I use gulf 1 now that sougi 6000 is gone.

Suigi S6000 is 10w40.

Gulf 1 is 10w60.

10w60 is great.... for tired engines with poor tolerances and/or serious blowby problems. Not something you would want to put in a RB which has 7.5w30 specified by factory (10w40 taking into fact our warmer climate).

The 60 rating is nice and thick for track duty, though if the engine isn't built for it (ie. no sump mods or extensions, head restrictorss), the thickness of the oil will have trouble draining back to the sump and the engine will end up with oil starvation.

  • 2 weeks later...

I just did an oil change after running Penrite Everyday full-synt 10W-40 for the last 2,500kms. Car had 102,500kms when I put that oil in, and now I just gave it some Motul 8100 x-cess 5W-40.

To be honest, I thought Penrite did a good job, but decided to try something different. Penrite oil was completely black after 2500 kms, so now I'll check if Motul looks the same after similar number of kms. Car did not use any oil during this period which is a good start. I'll also check for this really heavy burnt smell I had with Penrite from the start, it just smelled like it was burning, but some people on this forum said that this smell and blackness of oil is normal - lets wait and see how Motul goes.

quick question if i replace the pistons ,rings and bearings in the motor and valve springs etc what oil should i use after run in the reason i ask is i notice that people talk about older rb's etc with bigger tolerences and things and use a different type of oil eg. 5-60 grade i was planning on using a 10-40 Ur help would be appreciated

^ I'd rather my oil have all the black crap than the contacting surfaces inside my motor. What oil did you use before your change?

I'm about to start my maintenance regime on my newly acquired, fairly stock 34Gt-t. Kicking off with it's 100k service. I'm thinking of using Royal Purple 10w40 for my first stint, after a flush with a cheapy. But I have also been considering Motul 4100. Decisions decisions!

My mate ran RP in his 34 and had nothing but good things to say, plus you read the odd thing here and there. Not too many negative things are said about RP, if at all. But if anyone wants to suggest to me otherwise, go ahead!

yeah I agree with the royal purple going black really fast (though it is purple to start with...). I've mainly run it in my RX7 as that's what was reccomended but I didn't rate it that high.

much prefer the motul chrono 300v 10W40 for all my road going nissans (currently 2 GTRs and my silvia).

It's probably been asked and answered already but reading through all 108 pages is crazy! Anyway, I was just wondering what the best oil for an N/A R34 25GT (with the NEO RB25DE engine) is? A lot of people have recommended different oils and I'm just not sure which one to go for.

Thanks a lot.

Different additives are used to achieve the 10w40, other than that they're probably both quite similar, aimed at similar markets.

Were they going to scrap the 8100 xcess? I thought the xmax was released as just another product, not a replacement.

Edited by Galois

5w40 is thinner when cold than 10w40

also 5w40 has more additives than other motul oils and in the 300v format is the only viscosity that is not able to be mixed and matched

tuned the car on castrol edge 10w60 the other day...

so far the car idles perfectly, warm's up and runs perfectly at operating temp, and has no signs of negatives with the 60 weight or robbing of any power

car made 290rwkw on 20 psi (old motor made just over 280 on turbolight 10w40)

That's very interesting, how does the tune depend on the oil? Like what are the changes in tune for different oils?

Also what did you mean by the 300v mixing, as in it can't be mixed with other oils? Or other 300v's?

Edited by Galois

I just did an oil change after running Penrite Everyday full-synt 10W-40 for the last 2,500kms. Car had 102,500kms when I put that oil in, and now I just gave it some Motul 8100 x-cess 5W-40.

To be honest, I thought Penrite did a good job, but decided to try something different. Penrite oil was completely black after 2500 kms, so now I'll check if Motul looks the same after similar number of kms. Car did not use any oil during this period which is a good start. I'll also check for this really heavy burnt smell I had with Penrite from the start, it just smelled like it was burning, but some people on this forum said that this smell and blackness of oil is normal - lets wait and see how Motul goes.

Black oil is what you should be dropping and shows that it it cleaning carbon from the engine.

Burning smell is NOT normal and is a sign of an oil that is not up to the task for your engine.

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