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Old 02-29-2008, 12:05 PM   #1
Scooby Guru
Member#: 90347
Join Date: Jul 2005
Chapter/Region: AKIC
Location: Anchorage AK
2013 BRZ & Imp 2.5RS
Yamaha FZ8

Default UOA for RP and Valvoline 5w40 (I searched)

I'm about to switch to synthetic oil on my 2007 stage 1 STi and have been reading up on the oil issues people seem to be having with modified cars and 5w30 oil. I have been advised by some friends/techs to look into a 5w40 synthetic oil but haven't been able to find any recent UOA on them. I searched but did not see what I was looking for that was newer then a year old.

Does anyone have a UOA on Royal Purple 5w40? I'm also looking for UOA on 5w40 valvoline and even mobil 1. I did find a 5w40 UOA on valvoline but the thread was about a year old lol.

Any thoughts, advise and UOA you all can give me would be appreciated. My 07 is stage 1 for now. But that will change.
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