...ok, so it's not the oil magic trick you were hoping for, but I got your attention didn't I?!

I have about 2-3 quarts of oil "disappearing" every 300 miles or so. I change the oil and within a few hundred miles my oil light comes on. I check the dipstick and no oil! I completely cleaned the undercarriage of the truck - no signs of leaks. No oil in the driveway where I park it. No smoke or burning oil smell coming from the exhaust. Even if it was burning oil, I highly doubt that 2-3 quarts in 300 miles could go unnoticed in my rearview.

My 83 pickup has a 22R (131,000 miles), desmogged with a Weber carb - breather filter on the front valve cover hole and PCV valve routed down to the EGR plate provided by weber. I use 10w-30 pennzoil high mileage.

The motor seems to be running great, but has a way of making oil disappear! I simply can't figure out where it is going and it's driving me nuts.

Any ideas??

 

No blue smoke huh? Does the oil, when you drain it change it, smell like gas? Sounds like blow by, but if you don't smell burning oil...
I have a breather on my valve cover, and it definitely makes the area around it wet, but not 3qts wet.
So if I read your post right, you ran your PCV valve to the egr? So it's dumping into your exhaust manifold? I like the idea, just never heard of doing it that way. I would think that routin it that way would pressurize the system, rather then running from the intake which is producing a vacuum.
Sorry I don't have any answer for you.

 

Someone is messing with you. Kill one of your friends and keep killing one at a time until the oil leak stops. Then you fixed it.

:wabbit2:

 

^^^^lol wabbit. With no signs of loss, it seems possible a neighbor is borrowing some for his oil changes.

Has it eaten the 2-3 qts more than once?

 

ahahahahhah!

 

Well, my wife absolutely hates my truck so.....maybe I have my first suspect! LOL

RBX, the PCV valve is routed back to the EGR port on the intake manifold, not the exhaust. I may have mis-spoke.

I'm thinking that it could be blow by, but 2-3 quarts in 300 miles still seems alot.

Anyway of determining for sure if it is blow by? Wouldn't I notice oil coming directly out of my exhaust??

 

take your oil cap off and see how much blowby you have

 

It is for sure. Has it used this much oil more than once?
What do the spark plugs look like?

 

I bought the truck about a 1,000 miles ago. Spark plugs look good, and it's been losing oil like this since I bought it. It's weird though because
The motor is otherwise running really well. Should I seafoam it and then run some Bar's Leaks through it??

 

IMHO If you cant find any leaks right now, I think adding Bar's Leak will only create a new problem now or down the road. That stuff can clog it up even worse.

 

Looks like a rebuild is closer in my future than I thought huh?

I was planning on doing it in the fall, but I don't want to run any irrepairable damage to that motor.