Nissan 370Z Forum - Engine oil question

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- - Engine oil question (http://www.the370z.com/engine-drivetrain/8048-engine-oil-question.html)

motul 300v... double ester

Quote:

Originally Posted by davidyan (Post 160099)

Use a 5w30 for normal and even moderately spirited driving. The thicker oil weight is probably only good for all-day track racing and would be too thick for the close clearance engine. Either of the brands would be ok but Redline has the highest group rating and contains Ester as recommended by the owners manual if that's something you're interested in.

Does a higher group rating mean it's better?

No...

Some Group III oils outperform or parallel Group IV oils, for example.

Quote:

Originally Posted by davidyan (Post 160099)

So does Amsoil - here is a snippet from a paper on group ratings that has been quoted a number of times in this forum (emphasis added):

Quote:

The oils that are commonly mentioned are Group II and Group III synthetics with the exception of Royal Purple, which is a Group V. AMSOIL is a Group IV synthetic (PAO) but also uses Group V Ester technology. It gives you the best of Group IV and Group V synthetics. Mobil 1 is a Group III synthetic. AMSOIL is a Group IV synthetic.

Good >> Motul H-tech 5w30
Best >> Motul 300v 5w30 double ester