I'm surprised the "High Mileage Oil" fans haven't tried this one. It is a good 75 cents to a buck cheeper (at least at the store near me) than the Castrol, Valvoline and Pennz high mileage offerings. I think the Havoline HM was $1.80/qt. Heck, thats only 20 cents more than the Wally World HM 10w-30. Anyone here tried the Havoline HM or plan to?