Very smokey (smelly) exhaust

Possible cause is several drops of oil are leaking past the valve guide seals when the vehicle just sits. When it is started the oil begins to burn off in the cylinders and after awhile the smoke disappears. I have always recommended cha going the oil to a synthetic and adding an oil additive called Restore. It comes in a cylindrical can in 4, 6 or 8 cylinder size. Put 1 can in with the new oil. Drive the vehicle on the highway for 45 - 60 minutes. I recommend putting on a few hundred Mrs. The additive restores the valve seals preventing the oil from dripping into the cylinders. Have used it on my customers vehicles for 20 years. Saved them a lot of money from replacing the seals.

What a year and mileage ,could be head gasket .I try head gasket fix,works for me.

You don't mention what that smell is reminiscent of?

You don't mention the colour of the "smoke" and you didn't say whether the engine is petrol or diesel?

You don't mention whether the road behaviour/performance is normal?

White smoke is almost always steam or in the case of a diesel it could be an unburned fuel mist, grey/black is excess fuel and blue or grey/blue is burning oil.

Some steam is fairly normal until the engine and exhaust system is hot but excessive amounts could be one symptom of head gasket trouble. If the engine is drinking coolant and sending it through the exhaust as steam it will sometimes smell spicy.

Burning oil smells a bit like burned eggs in the frying pan.

If the car hasn't ultra-low sulphur oil and fuel the catalytic converter will convert sulphur traces into hydrogen sulphide - the bad egg gas...

I can't imagine that your car is "burning" all that oil in 20 miles. To be sure, remove the spark plugs and look for a lot of ash or really black/oily plugs. I would say more than likely you have an oil leak. Check under your car for a lot of oil streaking. At that rate it should be everywhere underneath.

yes,volvo,s have a problem with this,remove clean and reinstall the pcv filter or replace it,excessive crank case pressure can allso lead to blowing engine seals and gaskets.

Black smoke points to unburnt fuel. I would start by replacing the spark plugs and wires if you have not done so in the last couple of years.

hi, this consumption seems high, i would take it to a dealer and ask them to check the oil sensor.......
P.S. is there a lot of smoke coming from the exhaust, if so, it may be burning a little oil, ask dealer to check it

have you driven it at least 100 miles since repair?, the oil residue builds up inside the exhaust and burns off very slowly from the previous failed turbo seal.

i pretty sure thats a head gasket. black smoke comes from burining oil. white smoke comes from burning antifreeze.

run the fault codes
indicates a cat converter problem coupled with injector problems