Well i dont drive my 300zx daily but i noticed when i moved it some oil on the floor, smells like oil anyway.

 

Today there was a lack of power above 4500-5000 rpm, when i parked at home i noticed that turning the engine off there was a loud wining noise like a failing pump coming from the rear off the car. Not sure what that was, investigation showed the oil leak was coming from the join in the offside exhaust and the mid silencer all the offside pipe from that part on to the rear of the car was dirty.

 

Im going to assume this is not a good thing

oil from the exhaust can only mean 1/2/3 things ...

 

Turbo oil seals are gone or Oil rings on one of the cylinders

dont think the pcv valve would give u that much oil pass though to leak out the exhaust

 

is your oil level right ?

oil level was fine when i checked it but the pressure is up and down like whores drawers

also just started it up to check for smoke (never seen any still none now) from the exhaust and theres a definate whiney nosey from the rear of the car when the electrics switch on like a failing pump to the rear of the car?

appears oil may also be dripping off the rear suspension arm, i would have to jack it up to see where its source is and im parked on a cobbled hill :( could this be anything to do with the diff cooler? Its a UK spec