hi i just got a 91 prelude si with the four wheel steering, and its got a b21 in it that seems to be burnig more oil than gas. i want to just get another engine and put in it because this one has alot of miles. but i dont know if i want to put another b21 in if they are notorious for burning oil. can somone tell what i can put in and how? please, thanks alot!can i put in a b20 and if so what do i have to change to get it in there, or can i put a bigger engine in it?