5LiterRiceEater

ok, i just bought a 88 mustang gt, the guy who i bought it from told me that it has been sitting for 7 years and i got it running and it seems to be burning oil really bad. one of my buddy's told me that once i let all the old gas and everything burn out it will go away.. is that true?

PONY GUY

waht color is the smoke and how long ha sit been sitting .If it fule injected the gas is probaly bas so I would drain it or suck it out with a siphion hose change fuel filter and fill it up with new gas and dump a bottle of lucas injector cleaner in it with a bottle of fuel drier and drive it around town til the tank empties then changer your filter agian . If you run the old fuel in ther you might damage the the fuel system

Derf00

valve stem seals are probably dry-rotted so that smoke may never go away (if it's bluish/black)

5LiterRiceEater

its been sitting for 7 years. i already put new gas in it with some injector cleaner and new plugs.

PONY GUY

yeah thats a good start

thedude

If you see blue/purple smoke thats not good. It will only get worse. tear it down and rebuild.

Twisted

If it's blue smoke, theoretically, you may have one or more sticking piston rings--particularly if the car has been sitting a while. If this is the case (which in my experience, it never is), a few hard romps on the throttle may clear it up. Otherwise, either the piston rings are worn, or the valve seals are bad.

88stangaruu

^^^ This is the most likely thing thats happened. Its leaking down when its sitting there not running and when you crank it, it burns the oil

AdderMk2

valve stem seals are also simple as hell to replace

ZachW04Stang

The cylinder walls could be pitted too so its letting a lot of oil slip by the rings and burning oil.