What is the best synthetic oil?

WarmAndSCSI · 07-25-2010, 08:50 PM

Quote:

Originally Posted by tranceformer

It is indeed a thick oil for a 30 weight oil. It was definitely heavier than the 5w30 castrol syntec I used before. The UOA looked good, I needed a thicker oil for the 90+ degree heat down here in south Florida.

and how the heck did you manage 30+ mpg??

I'd recommend it as well. I'm on my second fill of that oil, I just got the UOA of the first fill. 4200 miles of 75% highway / 25% city and dozens of passes at the drag strip and it was looking pretty good.

It could be the altitude or the car might just be a factory freak. Computer reported 31.8 mpg average after a ~90 mile leisurely highway canyon trip the other day. That was also with about 10-15 city miles thrown in there. That and the low oil consumption both let me know this engine is healthy.

Awesome on the oil analysis - ours should be really clean since the Z really doesn't see that much action being my wife's car. I think I can be confident leaving it in for 5000-6000 miles based on your usage and UOA.

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