Well, everyone will laugh at this, but being an old-school guy, I 1st started using Havoline Supreme in 1976 on my 1st car (69 Buick Skylark GS) at my mechanic father's recommendation and I've been using it in everything I've ever used since (60s & 70s muscle cars, 3rd gen Camaro's, 90s and 2000's SUVs) and after hundreds and hundreds of thousands of miles, I've never had an engine problem.