Originally Posted by Toombs
I agree and share your skepticism, especially when it comes from a dealer, but there are some cases where Subaru REQUIRES you to change @ 3000 miles for first oil change. Specifically, I'm referencing the 3.6l 6 cylinder engines, after this change it follows 7.5k OCI. I'm curious about the justification. The 2.5 NA Forester required a first oil change at 3k miles but was changed in the manual with a revision in 2012.
Would anyone have data (MSDS) about current Idemitsu Subaru 5w-30 oil?
Best I could find is a revision in March 2012, which I don't know is the same as supplied to Subaru.
CATERHAM from BITOG, has information in his post but conflicts with above.
It is however from a revision in Aug 2011.
The 3.6R is the only engine left with the 3k mi initial oil change. Also the only Subaru engine which still recommends conventional oil. The EJ series have had a 7,500 mi initial OCI for a long time, even on conventional oil.
The best way to get info on the Idemitsu oil is to talk to Subaru or Idemitsu. UOAs seem to indicate it's nothing special.
Originally Posted by subi400
Just restating what has been said a few times is why not add a quart of redline 5w30 in there in place of one quart of the 5w30 subaru oil or whatever gets used?
Bump the additive level, zddp and moly content... lol
I know I would do it if I had a new subaru car and was under the warranty...
Not a bad idea, though I wouldn't use Redline, I'd use RT6 and PU 5w30. They're much more likely to have optimally compatible additive packages. M1 TDT and 5w30 would be a good combo too.