'O' rings on your cylinders could be worn, check your gasket seals, check head clearance and spark gaps. Could be many, many things, if you are not technically and mechanically minded then leave it to the Pro's.Whats wrong if the car drinks oil fast and hasent got an oil leak?
You normally see burning oil coming from the exhaust as blue smoke in the daylight hours,but sometimes it does not show up as such and the only way to see it is to go out at night driving and keep your eye on your rear mirror,you should see clouds of pale smoke in the lights of cars behind you.This will be ,badly worn or stuck in the grooves rings,worn or burnt out exhaust valve guides and valve seats,it could even be a blocked crankcase relief valve causing the sump to pressurise the oil up the bores into the combustion chambers,just check the plugs,you will see .I would drop the engine oil out,check the relief valve and fill will new oil and fit new filter,wash or change the air filter,fit new points and check your tyre pressures,the old beast deserves a bit of love possum.
The simple answer is that oil is getting into the combustion chambers and it should not be, therefore it is being burnt with the fuel,please dont be fooled by other suggestions that the oil smoke changes colour depending on what time of day it is,oil burns blue in the combustion chamber all the time but it just depends on how it gets into the combustion chamber and where from as to its colour when ignited.
Blue smoke is usually oil from the sump meaning the piston rings are letting past and the oil is coming up from the sump but it will also be blue if your valve stem oil seals have hardened and oil is running down the valve stem. as other answers suggest if you have an oil/fuel mixture set up fault then black or grey smoke will appear. if you have an old ford you could spend ages messing about with mixtures and levels and in the end it really ain't worth it just keep topping it up until the engine eventually gives up.Unless you are prepared to overhaul the entire engine then I would nurse it until it dies and then get a new car or engine unit whichever you think is worth it at the time.
good luck my freind. .MACLAREN.
You will need to have the engine compression tested to find if it is worn pistons and rings or worn valve guides. After recording the pressures on each cylinder a small amount of oil is poured through the spark plug holes and the pressures taken again. If the second readings are the same as the first then it is the valves that are worn.If the second readings are greater than the first than the pistons or rings are worn
Older cars have metal wear - especially in the rings (on pistons). Consider using a heavier oil. Consider adding an oil additive that makes your oil heavier. Check the oil often! Check you radiator water too (when the engine is cool). Don't check it hot !! Any automotive store will have additives - they can reduce engine wear and oil consumption. Check you other fluids more often too like transmission %26amp; brake fluid. It can have a lot of mile left if you drive it gently and keep all the fluids up.
How many miles on the clock? could be worn piston rings, In which case it would chuck the oil out the exhaust. Does the car smoke badly? if so that's your answer.
Usually it's a worn-out, high-mileage, badly-maintained engine. Look for black smoke from the exhaust.
Engine is shot. Trade it in. Scrapage if it 10 years old, or some garages will take 8 year old cars.
It's knackered!
That's BLUE smoke from the exhaust. Black smoke indicates an improper fuel/air mixture.
Big ends small ends rings bore pistons,expensive
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