What to do about excessive oil consumption in GM cars?
What to do about excessive oil consumption in GM cars?
The engines have aluminum or cast iron blocks and are equipped with active fuel management systems (AFM). The fix includes installing an AFM oil deflector and cleaning carbon from the cylinder head.
Why does my GMC Envoy have high oil consumption?
This bulletin does not apply to the Buick Rainier, Chevrolet TrailBlazer and GMC Envoy equipped with LH6 due to a different design oil pan and AFM pressure relief valve. On higher mileage vehicles (30,000-40,000 miles) you may notice high oil consumption along with a service engine soon light on and a rough running engine.
How much oil does a car use per mile?
On higher mileage vehicles (30,000-40,000 miles) you may notice high oil consumption along with a service engine soon light on and a rough running engine. All engines consume some oil, but these vehicles consume more than one quart every 2,000-3,000 miles.
When to re-evaluate your engine oil consumption?
Re-evaluate the oil consumption. Important: Some minor scratches may be noticed on the cylinder walls during piston and ring replacement. If the scratch cannot be felt when running your finger nail over it, the scratch is considered normal wear and the block or engine should not be replaced.
The engines have aluminum or cast iron blocks and are equipped with active fuel management systems (AFM). The fix includes installing an AFM oil deflector and cleaning carbon from the cylinder head.
Is the GM 5.3L V8 engine eating up too much oil?
Now, to be fair: Not every GM 5.3L V8 has problems with AFM. Many consumers report a trouble-free ownership experience. Still, AFM problems exist. The AFM excessive oil consumption problem usually crops up on vehicles that go on long highway drives.
How often should I burn oil on my 07 suburban?
Many 07 Suburbans burn a lot of oil – GM will try to tell you that a quart every 1500 – 2000 is normal – which is just ridiculous. If you burn a quart every 1000 as mine did they will repair it (if you are under 100,000 miles). It’s a big repair, major engine rebuild.
What causes an engine to use too much oil?
Oil consumption, which most consumers define as an engine that uses more than one quart of oil every 3,000 to 5,000 miles. Engine problems due to fouled or damaged valves, which can be caused by the excessive oil consumption issue.
