Wondering how much it costs to fix o-rings

he means oil rings. In order to replace oil rings you are talking about overhauling the entire engine. If you want to try some home remedies ( may or may not work), you can try full synthetic oil (they say it doesn't smoke). Also clean and/or replace pcv and breather system. Also a thorough fuel injection system service to clean existing oil deposits in intake or exhaust. Maybe a can of Restore in the crankcase. Now that said that is a lot to just pass a snap test especially if it doesn't work. NONE of these will fix your oil consumption problem if your rings are bad. Hope this was helpful

Marvel Mystery Oil-- add 1 quart , then drive the hell out of it for 500 miles make it WORK under load - as much as possible! do an oil change , add a quart (in place of a quart of conventional oil) and drive again No loss if it doesn't work!