Originally Posted By: y_p_w
Originally Posted By: HangFire
Mobil 1 warrants their AFE oil for 10K miles, if all is well with your engine then the oil is up to the task.
What does that really mean though? It's been noted that it would be extremely difficult to prove anything. I mean - what do you do? Maybe provide a UOA that the oil has a TBN of zero after 10K miles and maybe they send a coupon for 5 quarts of M1?
While we all know it would be hard to collect against any oil manufacturer warranty, the fact is Mobil puts out different warranty mileage values for different products, and at the very least we can use these to select the correct product for the intended OCI.
Originally Posted By: y_p_w
There's one case where someone's engine sludged up on regular uses of Mobil bulk oil at a dealer, and Mobil duked it out with the carmaker, which didn't want to admit that the VDC was abnormally hard on the oil.
If you're referring to the Honda, that oil was Mobil (non-1) Super 5000, which is NOT warranted by Mobil for 10K miles and was often run beyond 10K miles without UOA's due to the MM, in an engine known to be hard on oil. In a case like this, it is no surprise if Mobil refused to warrant that engine!