My 2006 Volvo S40 does not have an oil leak but it is burning through all the engine oil in between oil changes. I get my oil changed about every 4,000 miles.

Blue smoke is often the result of bad rings on the pistons. Engine rebuild time. It is possible that the turbo is leaking oil into your engine.

Burning oil may be the cause of the rest. Bad PCV system? Worn rings? Bad valve guide seals? Fully describe how and when it burns oil.

Need more information

The oil filter housing also houses the pcv system. What causes the noise is that there is a check valve in the pcv system that is supposed to regulate the pressure in the crankcase. The valve gets stuck and causes vacuum to build in the crankcase, which in turn sucks air wherever it can causing the noise, which is also why when you pull the dipstick it stops. This can also cause a check engine light with codes for fuel trim. The oil filter housing will need to be replaced. Good news is that Volvo extended the warranty on these to 100K miles so it should be free of charge at the dealer. One thing to watch for is oil leaks after the replacement from the camshaft seals. If air can get past a seal, usually oil can too. If the seals leak too long it can contaminate the timing belt and cause it to break, which causes a lot of damage.

Yes, When you run an engine low on oil enough to cause the light to come on then damage is being done. It sounds like you caught it just in time. I would change the oil and filter for shure as soon as possible. Then I would Change them again In a week or two. Then you should be OK.

Read my other posts to the same problem. if the noise goes away with the oil filler cap removed you need to replace the oil filter housing and hose. good luk

Hi,
I've reset this particular model I held down tripmeter button turned on ignition whilst still holding it down for 20 seconds at least then Bingo sorted.
If unsure hold all buttons on speedo face down.
Good Luck!
Paul 'W'
Onyer~EDson(:0) {#><U.K.

Its really easy... open the hood... looking back toward the car, its at the front of the engine, left hand side near the top... you'll see the hose coming out.. its held in with 2 large torx screws... make sure you change the rubber seal around the thermostat when you remove it.. also be aware some antifreeze will leak out.. so take proper precautions.. don't do it when the car's hot.. difficulty 1/10.. easier than an oil change.

It's very common for the turbo return line seal to leak. That is what I would check first, when it leaks, it will spray oil all over the turbo lines and the rear of the engine.

Bret
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