Where is the oil going?

[Dwight]

I had the same problem with a 347. Change to dinosaur oil and I think you oil consumption will go away.

Dwight

[bingo2]

Dwight....switching to dino oil was suggested by a local engine builder also, I'll try it at the next service interval.

Gary....the hose from the PCV to the carburetor is in new condition and I'm aware of how engines work but, a quart in 500 miles seems excessive, even for a performance engine. I've given some thought to an oil separator as well.

My daily driver is a 2010 Mustang, supercharged, and the engine doesn't consume any oil between service intervals. Maybe comparing apples to oranges though.

Ken

[jhv48]

Since you've eliminated most of the major players, and since your engine doesn't smoke and the plugs look fine, it's probably just a characteristic of your particular engine. I wouldn't lose any sleep over it.

From what I've heard, many new car manufacturers won't even consider a quart of oil every 500 miles as being unusual. And that's Toyota, BMW, and Mercedes.

[lippy]

In past years, the manufacturers would generally consider anything more than 1 qt/1000 mi to be an issue. These days tolerances are better. My daily driver, which is a BMW twin turbo with 113k miles, uses about a half quart per 7,500 miles. My other daily driver, a Chevy Truck, uses the same or less. I think 1 qt/500 mi is a lot and I would try to identify the issue.

[Luce]

What's cheaper, oil or an engine overhaul? Ditch the PCV for 500 miles and see where you are maybe, but if the smoke and puddles don't embarrass you, it's not burning or leaking enough to worry about.

Mine uses about 1 quart to 700 miles...more with more time at redline. Consider it a continuous oil change.

[DAVID GAGNARD]

Originally Posted by Dwight

I had the same problem with a 347. Change to dinosaur oil and I think you oil consumption will go away.

Dwight

I'd try this first,switch to any name brand 10/30 or 15/40 dino oil and see what happens.......

I have a buddy that farms and has been using one particular type/weight of engine oil in his equipment for years, no problems....some time back a salesman from a competing oil company paid him a visit and gave him enough free oil for an oil change in a couple of tractors hoping to get his business...he tried the competitors oil and found his tractors would "use" about a quart of oil every 5 hours of run time whereas they would use about a quart of oil every 20 hours of run time with the other oil........needless to say, he didn't switch oils......

Some engines are funny that way....

David