Originally Posted By: fdcg27
It would be interesting to see a UOA of this oil after it's been run to the point that your old Subie requires a quart of added oil.
I think we'd all be curious what that UOA would look like.
That's the plan, anyways... but there is no set timetable. For some reason that I have not yet figured out, my Subaru does not consume oil with any rhyme nor reason. I ran T6 for the first 3-4 oil changes and maybe had to add 0.5 quarts for all the OCIs total (7,500 mi each). Then, because I couldn't just leave well enough alone, I went with M1 0W-40. And it sucked down a quart in about 4k miles. Next up, Pennzoil Ultra Euro 5W-40. This was cruising along with zero usage up until about 6k, then used a full quart over the next 500 miles. This led to PPHM (last fill before this Harvest King) which didn't use any oil over a 5.8k OCI, but made all kinds of racket on startup.
Oh... I'm a filter [censored] too. Had PureOne 14610, M1-104, a K&N spec'd for a Porsche 924 (why? because it fit, didn't leak, and held over a half-quart more of oil!), and a Bosch D+ 3323 I believe. So in terms of being absolutely scientific, it wasn't. But I would imagine the time to hit a half quart of oil is probably around 4k. At current usage, it may be spring before I get there. How harsh the winter is will determine the amount of miles the old Forester gets since it's about 9.5mpg down on the Fusion I'm currently driving.
Glad you guys 'enjoyed' this new oil. So far, for $12, I'm good with it at 6k changes. Sometimes our expectations of oil these days beat up the reality of economy...