You guys keep harping about Pennzoil Platinum and Mobil 1, but in the meantime, you're missing out on an outstanding oil! Ever since I switched over to MAG 1, my engine has been extremely smooth. I'm talkin' Alaskan king crab dipped in hot butter smooth! The engine is noticeably smoother and more powerful. I'm also getting 3/10ths of a mile per gallon better fuel economy. I've gone from 18.7mpg to an even 19.0mpg of accumulated in town driving. And don't say it's because of other factors because I've been checking the mileage computer everyday for the last 3 years. The only thing that's changed is the oil type and filter type. I'm tellin' ya, you guys are missing out!