When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
wow thats an extremely bland question. any one of a hundred things, and since you didnt post any details theres really nothing to say here. sooooo.....ask your buddy if its got blue-ish smoke comming from his tailpipes - that means its burning oil. if its not burning oil, then he needs to start checking for leaks under the car. this is not rocket science.
how much oil is he losing over what period of time?
He is losing about a quart per fill up of gas. And it is not burning the oil, I think it's the rear main seal, but I don't see how that could already be a problem