Turbo leaking i have a 51plate passat. underneath the car the panel covering everything is damp.i have been told by a friend its oil coming from my turbo diesel. he said leaving the leak wont be a problem, as this wont effect the car overall??

sounds like the oil is staying in the head
and not returning to the lower end fast enough
the oil returns are clogged and restricting the flow.
The fix for this is remove valve cover clean returns
change the oil and filter reinstall valve cover.
If you do not know what you are doing take it to a mechanic.

Replace the oil pressure sender itself.

more than likely turbo, if it were rings that bad the car would run very bad. pull a spark plug and if it is dry it is most likely turbo.

I have a 2000 Passat V6. They told me that same thing. To replace the gaskets is easy. You just remove the covers and the air filter box and unscrew the 6 bolts holding the valve cover on it and there you go. You want to clean around the gasket service and add a little bit of sealant to the edges. Replace the old gaskets and put everything back together, be careful not to overtighten the bolts, can flatten out the gasket and cause oil leak again. On the right side of the engine, you have to remove the coolant box to get to it. Same procedure....

oil pressure switch

There are two gaskets, one is between the lower pan and the upper pan, and the second is between the upper pan and the engine. You only need to replace the gasket that leaks. If both are leaking, replace them both. To find out where the leaks are, raise the car, get underneath, and look closely all around the oil pans to see where the oil is coming from. Use a flashlight if necessary. You should be able to trace any leaking oil upward to its source.

The oil pan gaskets are not necessarily the only sources of oil leaks. Check to see if any oil is coming from behind the timing cover, and look for oil coming from the valve cover gasket.

if it's a diesiel the it's coming from your oil line to your turbo. if it is gas then it could be a leak coming from a leaking valve cover gasket.

turbo oil seals will cause a lot of smoking .

I had the same problem with my wife's 2006 passat turbo. We lost 2.5 quarts in 3000 miles and the warning light came on. They put us on a 1000 mile oil test and I lost 1.8 more quarts of oil. They finally agreed to replace the rings. Service tech told me that the factory rings are defective, they begin to lead after about 25,000.

blue smoke out of 1.8 turbo its allways bad oil seal inside turbo.need new turbo or rebuild OEM. with 24 years experience working with vw never seen single headhasket go bad on 1.8 turbo engines.blue smoke its 100% turbo every time