Just got through my first oil change using AMSOIL 5w-40. It meets all the MB standards and if you order online and sign up for the preferred customer discount you can get a case of 12 for $68.40 and a WIX filter (same brand that NASCAR uses) fo $10.35. With shipping it cost me $99.98. Add tax for California. And AMSOIL DOES outperform Mobil-1 in all independent tests.