So am I supposed to just throw away my 10 year supply of what has been working for me for the last 20 years & go with FL? Yeah, when I run out of what I have I might give FL a try, but what I use works just fine for me, & I'm happy with it. While a synthetic oil like Mobil 1 might work better than the Dino oil I am using now, I still have gotten over 250,000 miles from some cars I have used in the past. The motors were still perfect, but I junked the car for other reasons. Mobil 1 could help for Z06 Corvettes at 7000 RPM, but I just drive a Chevy Impala that rarely see's 3000 RPM. When I finally run out of my Slip 2000, TW25B, & Tetra gun grease in 10 years or so, I will be glad to try FL. GARY