Originally Posted By: spj
4wd for sure! Lets hope there is some meat to it.
The whole AP thing doesn't make sense. They charge you a large premium in price, yet you only get 5000 miles more out of the oil than you would with Extended Performance. EP is good for one year and 15,000 miles, so only if you are driving up to 20,000 miles in that year would you get any benefit from using AP. But then you're paying quite a bit more for that 5,000 miles than you would if you just changed out the oil when the EP came due.
No one here can do any sort of test or analysis to show the AP is "better" than the EP in any material way. Therefore you can only go by what the manufacturer tells you, which is that the oil is guaranteed for 1 year or 20,000 miles. That's all you have, and you need to compare that to the other guarantees ExxonMobil gives you for their other oils.