This is very good oil. It has a high PSI lubrication ability. Check out over 200 oils ranked by PSI --by 540 RAT GUY. He has a blog to ask questions and has ranking of all the popular oils put to his test. Amzoil 5w-30 Signature series is his highest ever ranking oil ever..But M-1 0w-40 Full Synthetic is right behind it. He runs 800 HP motors and his oil of choice is QS 5w-30 FS because it holds it values at higher temps. Anyway, good read and take it for what you get out of it.