2014 Subaru Forester 6MT 2.5L NA
ODO: 93,550
Estimated hours on oil: 2,972/42 = 71
Miles on oil: 93,550 - 90,578 = 2,972
Out: Mixture of Delo XLE, Mobil 1 5w-30, and QSE (+ the 1 pint residual Rislone 4102)
In: 1 gallon Redline 10w40 and 1.5qt M1 EPHM 5w-20
Off: XG7317
Estimated hours on filter: 70 + 71 = 141
Miles on filter: 5,901
On: XG7317
Car consumed 1 quart by 2000 miles. Consumption doesn't match rpm from what I can tell now. Topped up 20oz and kept on going. Used Lubegard engine flush prior to oil change. How would I describe the old oil? Hmm, well I poured it in the midday, bright sun, and I could barely see through it when it was a wispy drizzle. I would call that done. It was about as loaded as I have seen my old 2GRFE when it was at 8,000 miles on VML. While I was under, I noticed some oil weeping from the timing cover, which uses FIG. The valve cover gaskets also look like they are weeping, but they don't show any cracks while I was wiping it all away. I would be happy to say that the weeping was severe, as that's the better of two problems, but the weeping is not severe enough (in my investigative reasoning) to account for the missing quarts I get in the OCIs. I took the skidplate/splashpan off the bottom and there wasn't any oil visible on it (nor exhaust, or anywhere under the car). I don't know what the Redline may do to FIG at this state, hurt or help. I am anticipating that it will need to be replaced. It may go well with a pretty large service that includes a litany of things. I still like this car, but I wish it was a little bit more bulletproof. I don't know how long of an OCI I'll go at the moment.
2014 Subaru Forester 6MT 2.5L NA
ODO: 103,434
Consumed: 4.5qt
Top up: 4qt
Miles on oil: 103,434 - 93,550 = 9,884
Estimated hours on OCI: 9,884/44 = 225
Out: 3 quarts Mixture of: Initial fill (1 gallon Redline 10w40 and 1.5qt M1 EPHM 5w-20) + 4 quarts top up blend (4.5 quarts Traveller SAE 40 + 2.5 quarts QSEuro 5w40 + 1 qt ETO2380)
In: 3 quarts blend (4.5 quarts Traveller SAE 40 + 2.5 quarts QSEuro 5w40 + 1 qt ETO2380)
Off: XG7317
Estimated hours on filter: 225
Miles on filter: 9,884
On: XG3593A
Car consumption status: 4.5 quarts over 9,884 miles (2,196 mi/qt) or 225 hours (50hr/qt)
Consumption is not very dependent upon RPM anymore; I'm glad because I want to drive this car over 3k rpm without conviction (the people stuck behind me do, too.)
Early in the OCI I removed and cleaned the throttle body and replaced the PCV with a "Standard Motor Products V554 Valve" (a steel-bodied one, because apparently this is the 3rd iteration of a PCV valve the FB25 Forester was given over the years, the second of which was an aluminum bodied one that supposedly broke internally and caused many failures. Don't need that one..)
Oil catch can is consistently trapping oil mist vapors now; caught about 8oz in total for the OCI.
I started to do blot tests at about 6k miles to see if the DD package was capped, but all the way to the change (checking every other day), none of the blots ever produced
any such indication (halo feature inside blot), and always developed/finished into a tan color. (also, no signs of fuel dilution FWIW) Changed the oil and filter because I figured the filter might have a lot of deposits caught in it, and I don't really need to run the DD package to capacity, as that just creates more of a mess.
Tested new filter for leaks or fitment problems--none found.
