After doing a bit of reading, research into viscosities, etc, I decided to try M1 0w40 in my 17yo 4Runner.
Most PDS sheets show it on the thinner side of 40wt oils in comparison with Castrol Edge (which I also considered).
The bottles I purchased at WM listed it as European Car Formula, which I thought was the old version--but all the PDS sheets were for "Mobil 1 FS 0w40."
My understanding was the FS lost the BMW LL-01 certification while the European Car Formula retained it--but the bottles I purchased do not carry that cert.
This is mostly a curiosity thing as it really doesn't matter (and it seems to run really well), but which oil do I actually have?
Most PDS sheets show it on the thinner side of 40wt oils in comparison with Castrol Edge (which I also considered).
The bottles I purchased at WM listed it as European Car Formula, which I thought was the old version--but all the PDS sheets were for "Mobil 1 FS 0w40."
My understanding was the FS lost the BMW LL-01 certification while the European Car Formula retained it--but the bottles I purchased do not carry that cert.
This is mostly a curiosity thing as it really doesn't matter (and it seems to run really well), but which oil do I actually have?