High oil consumption 2001silverado 4wd, 4 door 6.0
I purchased the truck used. drove it 1500 miles and the oil level light came on. when I checked the oil it didn't show on the stick. added 2 quarts, and have had to do so every 1500 miles. Truck doesn't appear to smoke and does not leak. have tried synthetic, and now have rotella 10-40. nothing seems to help. Dealer says gm says a quart every 1000 miles is normal...sounds like the dealer is blowing smoke ...is he?
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Re: high oil consumption 2001silverado 4wd, 4 door 6.0
Every manufacturer has a guideline. But a quart every 1,000 miles seems higher then necessary. Try the easy steps first.
1. Check the PCV valve if clogged will caused pressure in crankcase and oil burning.
2. Remove spark plugs and perform visual inspection. IF electrode is covered in gook(technical terms, sorry), then oil is leaking into that cylinder. Most likely cause would be faulty valve stem seals.
3. Worse case scenario, engine oil rings are leaking. If all else is good. Perform compression test of each cylinder recording measurement, then add two small squirt of engine oil into each cylinder as you perform a second round, complete both dry then wet compression test on each cylinder before proceeding. IF any cylinder shows a more significant increase in compression then it would indicate that cylinder's oil rings are faulty. This is a major repair. Keep me posted
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How many miles on your vehicle ? Do you see any leak spots on the ground from the truck ? Blue exhaust , oil burning , valve guide seals , piston rings , PCV clogged .
Oil Consumption Diagnosis
Excessive oil consumption, not due to leaks, is the use of 1 L (1 qt) or more of engine oil within 3 200 kilometers (2,000 miles).
The causes of excessive oil consumption may include the following conditions:
• External oil leaks
Refer to Oil Leak Diagnosis .
• Incorrect oil level or improper reading of the oil level indicator
With the vehicle on a level surface, run the engine for a few minutes, allow adequate drain down time, 2-3 minutes, and measure for the correct engine oil level.
• Improper oil viscosity
Refer to the vehicle owners manual and use the recommended SAE grade and viscosity for the prevailing temperatures.
• Continuous high speed driving and/or severe usage
• Crankcase ventilation system restrictions or malfunctioning components
Refer to Crankcase Ventilation System Inspection/Diagnosis .
• Worn valve guides and/or valve stems
• Worn or improperly installed valve stem oil seals
Refer to Spark Plug Inspection .
• Piston rings broken, worn, or not seated properly
Allow adequate time for the rings to seat.
Replace worn piston rings, as necessary.
Refer to Cylinder Leakage Test .
• Piston and rings improperly installed or not fitted to the cylinder bore
Refer to Lower Engine Noise, Regardless of Engine Speed
No oil on the stick does not mean the engine is dry.Usually only about two quarts show on the stick.Top it off and look for leaks.Some oil consumption is normal on break-in.1000 miles should seat the rings so if you are still missing oil after that whoever rebuilt needs to take a look.Good Luck!
Factory says 5W-30.
You can do better with Walmart's full synthetic 5W-30 with a filter and oil change every 5 - 6,000 miles.
Just keep an eye on oil level - the V8 version of this vehicle does use oil after about 120,000 miles. The 6 is a bit better until about 150,000 miles.
what would a CV joint have to do with oil consumption? the answer ZERO, if the VC gasket was leaking that bad you would have a large puddle of oil under the engine every time you parked it for more than a few minutes, so doubt that is the problem, has the dealer run a clyinder leak down test to determine if the piston rings are sealing properly? that is the next step, sure sounds like they don't know what they are doing and they are guessing, make them do it for free, they changed out the turbo for no reason it seems, u are out $1800! and no change in oil consumption, make them do there job right or get ahold of the dept of consumer affairs for your state and open a case, that will light a fire under there ****.
Because your car is consuming so much oil, you need to check the level often, so the level won't go down more than one quart. You will get an idea how long you can drive the car before it is down one quart, and should keep the level at the full mark. You should change the oil filter, as it is still collecting contaminants. Have you checked the spark plugs condition? It seems the oil consumption will result in the plugs being fouled soon . Keep that oil level up, or the result will be a seized engine. Also, I'm guessing the tail pipe shows black residue, another sign of high oil consumption. This is probably why someone sold this car, they didn't want to deal with an expensive repair of an engine rebuild. You are correct, an oil change should be done every 3k miles.
Look for Castrol TWS 10W60 Motor Oil. This car should not burn so much oil, you need to use a different kind. It is recommended by BMW as well. I also heard the VANOS isnt an issue anymore, can be fixed with a different MAFF. Good luck!
The oil you took out was probably a lighter weight. A heavier oil will show a higher oil pressure. Make sure you are using the proper weight for the temperature conditions in your part of the country. Squido