Yeap, I do go WOT quite a bit, but mostly around 75%-90% lately to try and up my gas a mileage a bit.
Thanks for explaining the ECU bit and the fuel dilution also
I will try and not go as hard to see what happens this go around.
Originally Posted By: d00df00d
Originally Posted By: DARKSTI
A mix, about 40mi every day or so and sometimes 20mi, this also included a trip to San Francisco which was about 500mi total. I also drive in the mountains often and I have a bit of a lead foot on on-ramps and in the mountains
Right on.
Doesn't sound too bad, but remember, highway trips (preferably spirited) are your friend.
Do you go WOT when you drive hard? Try not to go past 80-90% on this next OCI and see what happens. Most ECUs usually run a little rich at WOT, so that might cut down on your fuel dilution without actually slowing you down.
Originally Posted By: DARKSTI
Also, what part of the UOA shows the fuel dilution? As I am learning
Well I can't be sure because I'm only an amateur myself and the report doesn't give all the necessary data. However, I'm guessing there's fuel dilution because:
- Both the flash point and the viscosity are much lower than the virgin oil
- This happened with every oil you had, including Red Line 5w-30, which never thins out unless it's diluted (as far as I know)
- Subaru engines are usually very easy on oil, so they're not likely to cause shearing except maybe with track use