Engine Mechanical problem
1985 Other Isuzu Models 4 cyl Two Wheel Drive Manual 180000 miles
my work truck seems to go through alot of oil. The only thing there is no oil leaking on the ground and it don't blow any blue smoke out of the exhaust pipe. It will go through about 1 - 2 qts 100 miles
The oil must be going out the exhaust or on the ground, it cant go anywhere else. If you have no external leaks, check the spark plugs for signs of oil burning, (whitish deposits) the burning may just be minor but constant. Try changing the weight of the oil and keep the services up as oil oil will burn off quicker than fresh.