Hey Scotty:
I bought 2017 Lexus LX 570 used about 1 and 1/2 years ago. It started to burn oil. Have to put in 2 quarts every couple of months of so. I just took it in for service and low oil level light came on. I took it back to Lexus dealership and they explained per tech bulletin the 5.7 liter engine can burn up to a quart of oil every 2000 miles. The oil recommended for this night is 0W-20.
There isn't any visible oil leaking around oil pain or head gaskets and no white smoke out of the tail pipe??
This just seems very excessive.
Please give your thoughts??
Thank you very much and love your YouTube Channel!!!
Ken K.
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How many miles?
There isn't any visible oil leaking around oil pain or head gaskets and no white smoke out of the tail pipe??
Coolant in the exhaust creates white smoke. It's actually steam, not smoke. Burning oil produces a bluish smoke, and smells like burning oil.
I took it back to Lexus dealership and they explained per tech bulletin the 5.7 liter engine can burn up to a quart of oil every 2000 miles.
Ideally, no engine should burn oil. A little bit (talking a half quart over 5k miles) is normal. Given the really thin oil your engine uses, more probably leaks past the piston rings than older designs using heavier oil. Engine oil systems aren't totally sealed internally. The oil degrades from heat and pressure, and lighter fractions enter the PCV system to be burned.
low oil level light came on.
This indicates oil pressure, which is not necessarily indicative of low oil volume. Check the oil on the dipstick after it's sat for 30 minutes or so. If it's full and still on, check the oil pressure with a manual gauge you can rent at auto parts stores. Somewhere between 25 and 65 PSI is in the normal range. The pressure sensor can go bad and need to be replaced.
Have to put in 2 quarts every couple of months of so.
If you're driving two quarts low before you add more, you're wearing out the engine prematurely, oil pressure is directly related to the tightness of bearings. If they're too loose, even just a tiny bit, oil pressure won't be correct, which will cause more wear, and the oil pressure light may come on. You didn't say the mileage your car accumulates over this time to judge how much oil it uses.
Please give your thoughts??
Do the simplest thing first and change the PCV valve. It's usually pretty easy to get to, and they're dirt cheap. If they get stuck open, they can cause the engine to burn more oil than normal.
