I used M1 from 140k-238k on my old car and burned about a quart every 5k miles compared to a quart every 3k miles on Castrol Syntec. The oil consumption never increased at all and the engine ran perfectly :dunno: worth it to me if I can get 8k miles out of an oil and peace of mind. I know Honda recommends 7500 on dino oil but that makes me queasy h: