Info needed: 1967 M38A1 Lubrication?

[rob love]

1/2 a quart in that time/mileage period is quite bad. You have covered the only 3 places it could go. Leakage standing still is not relevant, especially one to two drops per day.

Take a measuring cup and fill it with a half liter of water. Pour that on the ground and you'll see just how big a puddle you are talking about. Huge.

So either you are burning it, or leaking it. I would suggest leaking. Run the front wheels up on a pair of those little metal Cdn tire ramps like you might use for an oil change, and leave the vehicle running. Now you will see what the true oil leakage will be if it is from the rear main.

If it is not leaking then it is burning it. You have no idea how old those plugs are......they could have been changed a week before you bought the Jeep. Try a compression check. Cylinders should be at 120-125 each with the engine warm. Anything lower will indicate worn rings. What I normally found was that the cylinders would deeply score. These old engines have a very long stroke, and the scoring would go all the way from the top to the bottom, and deep.

In my experience, once compression was below 115, you were in trouble. At 110 consumption would get very high, and at 90 you will have trouble just to get the Jeep to start on a cold day.

Perhaps that is why you had a 2245 plug in the one cylinder?