Well, i have always had extra noise with mobil1. (but i never thought it was not protecting my engines) and i have told alot of people about it. So i must also tell people that i put mobil1 10w30sm (not ep) in my 2001 impala with 3800 engine and i now think it is SUPER QUIET ! The sm mobil 1 i got did not look like mobil 1 when i poured it. and it did not act like mobil 1 in the funnel. looked acted and stuck to the funnel like dino. anyone else notice anyhting ?