Right, i got a compession and leak down test done today, results were-
Cylinder 1- 240psi, 10%
Cylinder 2- 250psi, 18%
Cylinder 3- 240psi, 15%
Cylinder 4- 250psi, 10%
Are the leak down percentages for 2+3 ok? Im burning alot of oil at high revs, since my last service it reads just below the lower mark on the dipstick after only 500 miles (using shell 5w-40fs)
I also noticed there was alot of carbon build up on the exhaust ports, is it possible to burn that much oil through the valve guides alone?