Duralube you bet I run it in all my cars. I used it in a 283 that was really tired probely at most would of lasted two or maybe three months be for going to the great engine god In the sky . Or maybe because my wife drove the car but three yrs later it died. But only because she did not put antifreeze in one winter and cracked the block in the valley.That was a heck of a test for me If it could make that old 283 last that much more longer Im hooked