Being a canadian and all i see adds for formula 1 motomaster engine oil all the time.... Is it any good? I hear that it is made by shell, is it the same oil or shell oil with a poor additive pack? I see they have 5w20 versions of this and it's dirt cheap. Is it any good? If so it be awesome if i can get 5w20 for like 15 bucks a jug. If anyone can give me the low down on the motomaster brand oil, it be great.