Ive already done compression ck- all 8 within 200 - 220 psi range


leak down test with 100psi of regulated air - 7 of the 8 are approx 15 % loss. , cyl #2 is the worst at 20% loss.
Put my hand over the crankcase breather and thats where I feel air escaping.

Had both valve covers off , taking a mirror and probe around under the intake and NO signs of a gap anywhere between the intake and cylinder head on either side

The fact I get a puff of blue smoke on warm startups makes me think valve seals or guides maybe ??????


BUT, why such a dramatic difference in oil consumption. Simply because of one trip was almost entirely expressway versus other trip was 50-50 split hiway and city driving

Like I said,,,,,Im at a total loss and stumped. I truly expected it to use at least 2 maybe 3 qts on this trip and it didnt .