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In other words, could T6 5W-40 be SN rated as is or is there some chemical composition/performance metric that precludes it?

My extensive UOA testing on several vehicles from years ago suggests to me that once dilution occurs, no amount of normal usage will mitigate it. Enough of the fuel constituents will remain to show up in the oil. I suspect that one reason for this is the modern automobiles I have owned seem to...

Do you remove the driveshafts to do this? Ho-hum report, which is a good thing.

From the 2022 MB G Series Owner's Manual:

Dumped factory fill at ~1,500 miles. The test was done on the second fill.

But it sure is thirsty up there! That is the plan.

Oil in use one year and a few days. Towards the very end of interval was ~3,400 miles over 5 days of towing a 7,500# (total) U-haul trailer with vehicle to Moab from Alabama and back. (FWIW, averaged 8.1 mpg on trip out and 9.1 mpg on trip back. Engine worked pretty hard.) Day after trip was a...

I'll give you this, you are indeed bold using an non-approved-grade, unlicensed-formula motor oil in the engines you do and appear not be the least bit worried about warranty claims.

"... From Mike Miller's [of Roundel and Bimmer Magazine] maintenance schedule: 'Before they started paying for maintenance, BMW performed a break-in service at 1,200 miles on new cars, which included changing the engine oil and filter, manual gearbox oil, and differential oil. With the advent...

If a totally different oil formulation (that certainly by no coincidence contains high levels of anti-friction/extreme pressure components) than specified by BMW for future use in the engine was initially installed (or there was assembly lube used that subsequently disbursed into whatever oil...

The ICE mileage is predominately highway time with very few cold starts. Use strictly battery power for the numerous, daily 1, 2 and 3 mile runs.

Factory fill. Six months use. Fluid time is ICE miles, component time is ICE + EV miles. I presumed this would be LL-17 FE when I entered data in the Polaris system but when compared with an LL-17 FE VOA it clearly is not, but it is consistent with a couple of other recent BMW factory fill UOA's...

With only one limited-parameter test, do I really know what the data tells me? If I could get just fuel dilution, viscosity and TBN tests without all the other stuff, it would probably be more useful. Personally, I thought doing a UOA on a vehicle with 300,000 miles was superfluous in the first...

That would put me at about 5 years between changes at the current rate. Maybe a bit too long?

Six months (or 5,000 miles, whichever comes first) is Toyota's recommendation. If I were to base it on this analysis, more time sure seems doable especially if I run this little mileage. Probably will not fret if I let more time pass. I would consider my usage (especially rock crawling) to be...

Third oil change by me with same oil. Prior owner used it at least once according to quick lube sticker. Only thing "off-label" was last two tanks of gas I used CataClean during the last 1/4 tank.

Eight months on oil. (Went 2 months longer than recommendation because only drove about 400 miles in last 2 months.) Mix of high-speed highway, dusty 4WD off-road rock crawling and stop/go city miles. I suppose it is so worn out there are no more wear metals to be had. Fram Extra Guard oil...

To my knowledge they never backspec'ed 5W-30 in the 2018 model, of which I owned one since new until last week. (Mine never had the consumption issue.) I am also not sure they ever determined a cause for it, or at least made it known to the public. Yeah, they put in a dipstick that didn't read...

Maybe trying to deal with the oil consumption issues that plagued some early 5.0 Gen III Coyotes.