I have a chrysler 300 v6 with 34000 miles, and it uses about 2 quarts of oil a month or so. there is no visible leakage anywhere. what should i do. will so lucas oil treatment work? or what else do i need to look at or for to diagnose an issue before something big happens?
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Re: car using oil, but not smoking or knocking
Sounds like you have a piston/cylinder problem. If it is under warranty, take it in and have it looked at because if you have no visible leaks and no smoke, you have an internal motor issue. You can try Lucas Oil, it is a cheap fix for right now. I have it in my 76 Chevy pick up with 187,000 miles on it and it stopped my oil oil consumption problem.
1 bottle of Lucas is 32 oz. You use the whole bottle with a V-8.
Also, the internal problem is a piston ring or cylinder issue.
Bring that car back and demand a new motor! no way should it burn 2 qts a month. those cars are ****. get a new motor and then sell it to the first fool that is willing to take it off your hands. take the money and buy a toyota. US cars are JUNK. don't be fooled by the cartoonish appearance or the word "hemi." these things whould have never been built... get rid of it while you still can.
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WHITE smoke? Or BLUE smoke? White smoke is usually caused by burning antifreeze (possible blown head gasket). Engine oil burning causes a bluish colored smoke.
Changing the oil two months ago means absolutely nothing to me. I have customers that travel 6000 miles or more in a month. Oil consumption is measured in volume over miles, not volume over months. It is normal for most 4 cylinder engines to use a little less than 1/2 quart in 1000 miles (even more than that for 6 cylinder and 8 cylinder engines).
One quart per month is a bit more than I'd expect but you didn't mention how many miles you drive during that month.If you live where the ambient temps are very warm, it may help to use a good synthetic. Synthetic oils do not burn off or break down chemically as fast as conventional oils do. I'd use a 20w40 grade. Depending on the miles you've driven you shouldn't have excessive ring wear but the valve stem seals may have dried out and cracked. If the usage remains constant and there is no smoking etc, you could either leave it alone or have new seals installed. Average driving is approximately 1,000 miles per month so when figuring consumption, use that as a baseline. One quart per 1,000 miles in very hot conditions is a bit high....I'd expect to see 1/2 qt or slightly less. One odd thing though is that generally, especially in an engine that holds six quarts to begin with, at five quarts, the engine should not feel any different!!! Also.....you use miles to determine oil change intervals. Oil is best changed at between 3K and 4K miles. Only way you use the 3month method is if you don't use it much. (you can run most good synthetics longer than that)
if it is not leaking then it is being burned by the engine, how many miles go by before you need to add oil?, if u are adding more than one quart every 1000 miles u have piston reing problems and or valve guide seal leaks. U won't see any smoke in most cases unless you are really going through the oil, like 1 quart every 300 miles.
At 40K miles it shouldn't burn that much oil, unless the motor has been abused or overheated. With no signs of oil leaks, the engine must be burning it via the exhaust,
Change the oil (use a good quality oil) and then observe oil consumption.
If it still uses excessive oil check further as below:-
1) if it blows blue smoke on steady accelleration (pistons or ring wear),
2) only blows blue smoke on initial accelleration after a period of steady coasting or de-celleration (faulty valve stem oil seals).
It is not normal for a car with 29,000 miles on it to consume this amount of oil in 10,000 miles. We usually change our oil between 3 and 5 thousand miles and thus may not notice small amounts consumed but certainly not 1-2 quarts. It is more likely that you are leaking oil, but if it is burning it, that is a real problem. If the car was pre-owned do a CARFAX. If it was wrecked, find out was was done. If the odometer is correct, this car needs to be inspected by a professional. I can tell you to look for unburned oil in the tailpipe, smoking exhuast, leaks from the oil pan and drain. Change the oil and filter and closely monitor the level.
If you love the car as you say than be prepaired to shell out the bucks for a rebuild or replacement engine, because thats the only fix for your situation. You may not see any blue smoke but believe me its burning it, or you got a leak witch you say you don't. Its going someware and most likely its out the exhaust.