It's probably like Valvoline's transmission warranty...if you use MaxLife ATF and you have trans problems/issues due to the fluid, we will warranty. YEAH RIGHT!! The installed it in my last Stratus (req'd atf+3/+4). The clutches had high wear, the shifting was bad and it wouldn't go into 4th gear at times. Fluid was tested and found to be the culprit. Did Valvoline even return phone calls? NO. Did they really give a darn? Not in the least. Did they do a thing? Nope. Not until court action was pressed, did they flush with ATF+3, which somehow made the symptoms go away, but the damage was still done. If the car wouldn't have been smashed, I would have pursued more. All-in-all, saying an oil company will warranty sure must help sell products, and that seems to be in their best interests, forget the customer when issues arise. On the other hand, oil/lubrication realted failures are very rare if an engine is even halfway well maintained. As mentioned before, it would be interesting to see how long an engine would last on SuperTech, or any cheap current API rated oil, just to see the difference oil makes. I, and several others, do believe in better oils or oils for a certain application, but in the long run any major oil should do just fine.