l have a Lexus LS, everytime l start the car excessive amount of white smoke comes out of the exhaust. It only happens If l leave the car sitting there for more then 2 hours. Some say it can be water leaking, but all my water and anti freez are still in tack. So l really do not know.

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white smoke usually means a blown head gasket, and somethimes water wo not stay in the radiator.

Take your car for a full checkup. White smoke is comes out of the exhaust only when the engine oil leaks into the combustion chambers and gets burnt with the fuel. It is really bad for your engine, get it fixed fast.

Your engine is getting old.

The white smoke u see is oil that runs down the valve stems past the hardened-by-age seals & worn guides into the combustion chamber where it is burned & becomes white smoke.

If this is the problem, u should only see the smoke at startup, & not for very long. If u have volumes of smoke for a long time after starting, then it would be coolant.

The way to tell the difference is in the smell of the smoke. If it smells like vapor of antifreeze, well, that is what it is, but if it smells like burnt oil, well it is that!

There is other possibilities, but they would not apply if it is just at start up & no other time.

If coolant levels remain normal, l think you just have condensation in the exhaust system that is boiling off. :-)=

Do not sound good

What u have is a product of General Motors cloked as a foreign product. The products created by Toyota, AKA General Motors, r sludge mobiles. These cars all have problems with oil into the engines because of the design. The oiling passages r too small & the oil sludges up & does not lubricate the engine components properly. The valve guide seals wear out & coolent & water leaks into the combustion chambers mixing with the fuel. The white smoke is the byproduct coming out of the exhaust. Toyotas need to have preventative maintenance like oil changes every 3000 miles including oil filter with the right oil for the year & model, coolent flush & the right coolent for the model & year of the car & good gas. Your water & antifreeze may be at adequate levels now but u will see them decrease over time & then it will be too late for the engine because moisture in the engine destroys the engine & the engine components.

it might be thetype of gas or your fuel injectors

i'd check the engine. l brought a 90 honda prelude si from a private owner, and l had to replace the engine because of the white smoke. it comes from the engine.