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Excessive oil loss

This engine still has good power but the oil level is low after 400 to 600 miles. Valve guides worn?

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  • Cars & Trucks Master
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Worn valve guides are indicated when after the engine has been idiling for a while ie at lights etc there is blue smoke from the exhaust when the engine is given some revs. check under the vehicle for oil leaks. they will show up as wet on the underbody. check all oil hoses. loose or faulty oil filter. loose sump plug etc. with that amount of consumption something should be obvious. How having said that I rebuilt a 4 cyl petrol motor for a dodge fuso 3 ton truck and it empied the sump in 100 miles It had a ring problem.. If the motor has been rebuilt it is possible the rings are fitted upside down and act as a pump pushing the oil into the combustion chamber

Posted on Jan 08, 2013

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Posted on Jan 02, 2017

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  • 7 Answers

SOURCE: oil consumption, no smoke, no leaks

Yes a crappy PVC valve can cause some of your problems but not necessarily all of them, they are cheap, I always replace it to start. The air cleaner housing being full of oil is like how the oil is being consumed. In addition to a PVC valve, there may also be a blow-by hose running into the housing. check to see what other hoses go into the housing & which ones have oil coming from them. I'm not familiar with the "Motor Honey" you mentioned but I rarely add additives to my Engine oil, especially if they are thickeners. The only stuff I recommend is a Quaker state or similar "High Mileage Oil". These semi-synthetic oils have additives to swell old rubber & cork seals in older engines and can help reduce oil consumption & leakage. Again, it may not be a total solution, but it couldn't hurt to drain out all of the existing oil & replace with a high mileage type & also change the filter at the same time. Never mix it with other oils, despite the manufacturer telling you it may be safe to do so.

Posted on Mar 29, 2009

  • 12173 Answers

SOURCE: 2002 Trailblazer. My oil pressure low dsiplay came

could be a few things-(if oil pressure is showing low usually under 20 lbs recheck oil level) bad sensor,oil pump,low oil level ,sludge have truck scanned for trouble code some stores such as auto zone / advanced auto scan for free

Posted on Nov 04, 2009

Sean80000
  • 1867 Answers

SOURCE: 2006 BMW 325i - low oil level 5 different times.

There is a lot wrong with "low oil" and low oil is not normal in a low mileage healthy engine.

The dealer is fobbing you off in the hope you will go away.

If the oil is being changed at least every 5000 miles or so there should be minimum oil depletion between changes with only very minor top up needed. Some oil consumption is normal but it should be minimal.

If the oil level is dropping to a very low level in about 4000 - 5000 miles of normal motoring you have a significant problem. The oil is either leaking out or the engine is burning excessive oil or a combination. If there is no leak through faulty seals or by other means such as oil escaping into the cooling passages of the engine, then there is excessive burning.

These engines are known for excessive oil consumption because the problem is a common one in the 06, 05, 04 and previous year builds back to about 98/99. The dealers know all about this problem - as does BMW - and they will try to fob you off until the car is out of warranty because the fix is expensive.

From what you say the problem has not been fixed on your car. Document the oil loss and insist on your warranty rights because your engine is using excessive oil and this is NOT normal in a properly functioning motor with as few miles as yours has. Make it clear to the dealer that you are well aware that excessive oil consumption is a common problem in many of the 325 petrol engines and you want it fixed under warranty.

Then sell the car as these vehicles will cost you quite a bit in repairs once out of warranty and once you clock up around 60000 miles or more. If you have an auto you can expect major problems at about 65000 miles (later if you are lucky) and replacement of the transmission will be necessary. Once you notice any significant problem with the auto transmission it is on it's way out.

Cheers
Sean

Posted on Dec 17, 2009

  • 1 Answer

SOURCE: excessive oil consumption

I had same problem....valve seals were bad....dealer fixed free...warranteed 7 years or 70,000 miles...good luck!

Posted on Jan 27, 2010

zaldyboy01
  • 293 Answers

SOURCE: Oil level low light comes on. When I turn

some cars with oil level warning light on, it doesn't mean that its only reading the engine oil level is low, sometime the transmission fuid too. Did you check your transmission fluid if it is ok or not? try to check and let us know, ok.

Posted on Mar 14, 2010

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Why is my 2000 kia sephia blowing blue smoke from the tailpipe. it has 86,000 miles. the check oil warning light is on even though the dipstick reads full.


The most common cause of blue exhaust smoke is oil leaking past engine seals and into the cylinders where it then mixes and burns with the fuel. This is most frequently seen in older or high mileage cars with worn seals and gaskets. It only requires a very small amount of oil leaking into the cylinders to cause excessive blue exhaust smoke.

Blue exhaust smoke only at start-up can indicate worn piston seals or damaged or worn valve guides which may also cause a rattling noise. An external engine oil leak can drip onto hot engine and exhaust parts causing what appears to be blue exhaust smoke. Other possible causes of blue exhaust smoke include: piston wear, worn valve seals, a dirty or non-functioning PCV valve, worn piston rings, an intake manifold gasket leak, worn engine oil seals and possibly even head gasket failure.

Oil leaking into the cylinders can cause a rough idle, misfire and fouled spark plugs. In addition, a reduction in power and oil loss can be indicators that the blue exhaust smoke is caused by an internal engine oil leak. Internal engine oil leaks can also allow fuel to mix with the oil in the crankcase which will degrade the oil and prevent it from adequately protecting the engine.

Operating a car with a severely dirty oil filter, air filter or improperly functioning PCV valve can also sometimes result in engine oil blow-by, oil loss and blue exhaust smoke. Periodically checking the engine oil level with the oil dip stick will indicate if there is excessive oil consumption. Higher viscosity engine oil can sometimes temporarily reduce the amount of blow-by; however, this is not generally recommended. Excessive blue exhaust smoke indicates a possible internal engine oil leak that should be inspected by an ASE certified mechanic.

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My 2008 chevy avalanche is burning 1 quart of oil every 1000 miles


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
Checks
Causes
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).
Preliminary
The causes of excessive oil consumption may include the following conditions:
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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

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check that the oil level is not over the mark as this causes foaming of the oil and loss of pressure. At 80km/hr you will be doing around 3 grand and that will be enough to whip the excess oil into froth.. Too much oil is worse than too little oil.

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Abnormal exhaust smoke


definitely an oil consumption problem. How many miles? Could be worn rings and or valve guides. The oil light on when hot indicates low level or possible or weak oil pump. Check compression for possible head gasket or cracked head. I wouldn't drive it untill diagnosed.

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1998 Chevy Malibu is using excessive oil. Had an oil change done back in October 2012 . Then checked Oil level in December of 2012 and was about 3/4 low in oil! why ?


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Why does the van smell like gas when i come to a stop


If the engine is buring oil, it usually smells like burned toast. Check the oil level on the dipstick to see if the oil is low (add oil as needed to bring it back up to the full mark. DO NOT let the engine oil level get too low or serious engine damage will result!. Do a compression check or leak down test to diagnose worn pistons or rings. The underlying cause may be worn or broken piston rings, worn or damaged cylinders, worn valve guide or valve guide seals. A PVC valve could also be at fault leaking oil into the intake.

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General rules of thumb: Low speed engine on acceleration with smoke in the exhaust plume = worn piston rings High speed engine accelerating (spooled up turbo) with smoke = oil form turbo bearing and/or piston rings Engine on over run (coasting down, foot off the gas) with smoke = oil from valve guides. VW/Audi make good engines with tight tolerances so none of the above should apply at 62K miles; just make sure that the oil (the right oil) and oil filter are changed regularly.

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1 Answer

Engine smoke&sludge


Smoking & sludge ...OK, first, smoking on startup generally is the result of worn valve guides or valve stem seals. Excessive sludge in the engine can worsen this condition as sludge buildup can block oil from draining back to the pan, instead remaining inside the valve cover where it can run down the valve guides overnight.
If you just got the car and want to get rid of some sludge, change your oil every 2000 miles for a few months. Use a good quality oil and add a pint of marvel oil to it each time. On an engine with substantial sludge, I don't advise using any flush products. They work too fast and end up jamming residue into the oil screen, preventing proper oil flow to the pump. It took a long time for the sludge to form, don;t expect anything will remove it immediately short of a complete teardown & rebuild. If that's the only problem you have just follow what I said and you will be OK.
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1990 ford 460 (carburetor) using excessive oil.


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1 Answer

Oil consumption


Bad valve seals
Worn valve guides
Pressurized crankcase (oil pan) due to a clogged PCV valve or breather system
Blow-by from worn piston rings

Bad valve seals: The valves are located in thecylinder head above the combustion chamber. Oil is pumped at 50 to 80 psi of pressure into the top of the head, lubricating the valve-train; the valveshave seals on them to stop the flow of oil down into the engine when the valve is open. If the seals fail, oil is allowed to flow down into the combustion chamber and is burned.
Worn valve guides: The valves are guided by a small cylindrical chamber called a valve guide. These guides wear over time causing eccentricity (or slop); the excess gap allows the flow of oil down the valve stem into the combustion chamber to be burned. What about the valve seal you say? Well, the gap is too great for the seal to stop the oil flow, so down it goes to be burned.
Pressurized crankcase due to clogged PCV or breather system:The car's engine is a giant pump, consequently it must breathe. The PCV (Positive Crankcase Ventilation) system does just this, allows the engine to exhaust the excess pressure build-up (which is a natural phenomenon of the internal combustion engine). Carbon build-up is a by-product of an engine and can build up in the PCV system, clogging the breathing passages. This in turn pressurizes the oil pan and pushes oil up into the fuel delivery system, where it is fed into the engine and burned.
Blow-by from worn piston rings: The pistons in your car's engine have seals around them in the form of rings. These rings do two things:
  1. Seal the combustion chamber so the precious power developed from the firing of the cylinder is not lost.
  2. Provide vital lubrication to the cylinder walls.
When the rings wear out, the pressure from combustion reverses down into the oil pan, pressurizing it and forcing oil into the valve covers, through the breather system, back into the fuel delivery system, and into the engine to be burned.
You may ask yourself, "What can I do to stop this from happening?" Keep your oil and filter changed every 3,000 miles and keep the air filters changed every 12,000 miles!! This will keep sludge and carbon buildup down to a minimum. Understand that you can't stop mechanical wear, but you can slow it down!

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