if you are looking to silence yer valvetrain, i'd suggest you stay away from the 0w40 weight for the time being, and that you try out various brands of conventional w40 weights to see which one quiets things down the best. as seen here
http://theoildrop.server101.com/ubb/...=000095#000000
mobil 1 0w40 is a very thin 40 weight, as shown above. i only suggest that you be more contemplative about it because i know how hard stuff like that is to get in canadia
,( expensive too) and i wouldn't want you to waste money and go out of your way to get something that doesn't get the job done. the mobil 1 5w40 is thicker:
http://theoildrop.server101.com/cgi/...;f=11;t=000202
but i'm sure you'd have a hell of a time getting that up there if you have trouble finding the 0w40. i looked at bobistheoilguy.com for a virgin oil analysis of mobil 1 10w40, but couldn't find any (must not get much play in the US market). you could probably buy a fancy boutique french oil like motul in canada for near the same price as the rarer mobils. me, i know that my vehicle runs well NVH wise with a moderate weight 40 oil, so i might either try to use a real thin cheapie oil with visc. close to m1 0w40 to see if it would work. if it doesn't, ill just bite the bullet and pay the $1 premium a bottle for the 5w40.