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Old 12-02-2012, 05:44 PM   #88
Scooby Specialist
Member#: 216984
Join Date: Jul 2009
Chapter/Region: NWIC
Location: Coeur D Alene, ID
1996 Impreza outback


Originally Posted by bluesubie View Post
There's a lot of misinformation in this thread, but i'm busy so I'll just respond quickly.

Subaru of America has allowed 7,500 intervals since mid-2011 MY.

Yes, this is on 5W-30 and, as noted by others, the manual only refers to 5W-40 CONVENTIONAL for replenishment only. There is no such thing as 5W-40 conventional!!!

To those running Motul 5W-30, it is not API SN certified. IMO, this is a good thing but some people are afraid of not running SN oil. A dealer will not ask you if your oil is SN or not. Motul Eco-nergy is a thin 30 weight and is SL rated with a stronger anti-wear package. X-clean is a thick 30 weight that meets Euro ACEA A3 specs like GC. It also has a nice shot of zinc and meets API SM specs.

Amsoil OE and XL lines are fully API SN / ILSAC GF5 certified.

Mobil1 5w-30 API SM shears from just shaking the bottle, but the API SN has shown decent uoa results in a WRX. Check bitog. There's just not much data on it.

Rotella T6 meets API SM specs for gasoline engines.

Royal Purple xW-30 API SM has been shown to shear like Mobil1 and EVERY other Energy Conserving 5W-30. RP High Performance Street is their good non-girly man oil.

Reflash your ECU or mod your car and your powertrain warranty is out the window anyway. Warranty schmarranty. Buy M1 5W-30 for the receipt and exchange it for M1 0W-40. Not that I condone this behavior.

To those that think one or two random $30 uoa's are useful in comparing wear between brands, this is not true.

Note that the manual says that 5W-30 synthetic is required for "optimum engine performance", not that 5W-30 API SN is required for warranty coverage. BTW, there is no industry definition of synthetic. It is only a marketing term.

The bold sentence up top would be a good thing for new 11-13 subaru wrx owners looking to stay with a 5w30 and in compliance with their warranty.

There needs to be a new thread stickied with the now available 5w30's that are good like this Motul X-clean 5w30
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