Ok so my car has been eating oil pretty bad. I changed the oil and filter a month and half ago with 5 quarts of 5w30 castrol GTX. I've been noticing that I'm losing oil pretty bad. Its not leaking, just burning, gives out blue smoke at WOT. The thing is, its mixed in with black smoke because the car is running really rich.

So my question is, because of the car running super rich, could it have "washed" the piston rings? Heres a dyno chart to give you an idea of how bad this richness is.

http://img.photobucket.com/albums/v3...tsbday003a.jpg

 

Ya sounds like your rings are bad. I have never heard of running rich damageing the rings. I know you can warp valves if it runs rich to long.

 

I'm confused.. what does a blurry pic of a dyno sheet have to do with your car running rich?

 

huh? Its not blurry at all lol.

Anyways, I was posting it to show you the Air to Fuel ratio graph shown at the bottom. It dips to 10:1 and never sees daylight above. The problem is that the dynos particular wideband doesnt read any lower than 10:1 which means I'm probably sitting below that... I know that 13:1 is bout as rich as you want it on an N/A vehicle and I've heard about being TOO rich (in the 6:1 area) can cause all sorts of problems, including "washing" rings. I'm not all too sure what that term means, I just know that it makes the rings almost useless.

 

Basically the gasoline washes the oil that the rings slide on away, and causes excessive wear to the rings, cylinder walls and the pistons as well...

I'd suggest taking things apart and checking to make sure that your cylinder walls arn't glazed, and make sure that your cylinder bore isn't worn out of spec...

 

why don't you put the dyno sheet away and try trouble shooting. might want to consider a compression test and a leak down test. both would be a lot more meaningful than a stack of dyno sheets to determin if your rings are bad or not. since rings aren't the only reason for an engine to burn oil it might be more cost effective to investigate before you rebuild your engine.