My 2004 Mazda 6 Sport Wagon starts with a cloud of white smoke. It burns oil like there is no tomorrow and the dealership tells me I need a new engine because this one's dead (66,000 km). They want $2200 for a used engine for a total of $4500 with labour. Does that sound normal to you?

fuel injectors. they are most likely pouring fuel into the cylinders instead of spraying a fine mist.

sounds like head gasket

engine burning fuel.
not good sign

Sorry to tell you this is most like a head gasket leak, or a crack in engine cylinder head. The white smoke is usually anti-freeze burning. When the motor heats up the metal expands and can plug the leak. Do a search on you tube for Scotty Kilmer He has some good videos and information on head gasket leaks. It's usually very expensive to repair mechanically, but he suggests some sealants. If the leak is not too bad the sealant may work. Some cars are notorious for bad head gaskets.

The other thing it may be is oil burning if it's more of a blue gray smoke. When the car sits overnight, on older cars if the valve seals leak, some oil can may accumulate down into the engine cylinder. When the car starts this burns off. If a piston in the motor has a broken ring it can continue to smoke.

The best way to determine your problem is to check the levels of antifreeze and motor oil when the car is cold. Do NOT try to check the antifreeze when the car is hot, or you can get sprayed with hot antifreeze. Good luck.

Sounds like you should be looking for a place to trade it in. The motor has serious internal issues.

2004 mazda rx8 burning oil every 1500mile is normal? i never used a car that burns oil. do i just add oil in the eng and it will b ok?.

You probably have a bad head gasket.
To verify this see if the coolant is milky or if there is oil in the coolant reservoir. If so you need a new head gasket . If not you have an oil leak into the combustion chamber.

Approx cost for head gasket w/head cut approx $1500 to$ 2000.

If it turns out to be an oil leak into combustion chamber I really can't project . Need to know whats leaking and why.
Good luck

The jag 6 cylinder does emit white smoke on start up generally, its condensation being burnt. However, if it is excessive, you should check to see if you are losing coolant. Then its a whole new ball, game. Black smoke indicates excess fuel being burnt or lack of it , ishould say and blue smoke indicates oil burning.
Hope this helps

I'm assuming that that smoke was more previlant while going uphill because that's when the turbo would be really spolling up to max psi. I would guess that if you really got on the gas hard and got the turbo going even on a flat surface, that you would notice the smoke too. The loss of power and the white/grey smoke are tell tale signs that your turbo is bad or starting to fail. Good luck!

The more likely symptom for white smoke from exhaust is piston rings are worn out . Due to this there might be oil leakage and engine oil which is meant for engine lubrication might have entered the combustion chamber. Burning of engine oil produces white smoke. You should quickly change the piston rings as if you ignore this problem this can cause engine mal-functioning