my 91 civic si is burning a whole lot of oil (2 quarts in the last 1k miles). what could be the cause??? maybe the piston rings? i don't see any blue smoke or anything coming out of the exhaust or from under the hood. any ideas?

 

bump

 

are you sure you have no oil leaks and that engine is leaking oil and not burning it?

Also, if confident of no leaks, how many miles on engine?

 

it has 157 k miles.... that sounds like quite a few but not for a honda so i don't know whats goin on

 

Do a compression test, then add a cap full of oil in your cylinder and do it again. If it raises up a bit most likely your rings. that'll answer your question if its your rings