Sounds like what I experienced with my '95 855T (~190K miles). Most likely, your PCV system is clogged. It's a common problem, reported here and other Volvo websights. It's not likely that your turbo seals are NG so save your money. FCP Groten sells a breather box kit which includes the breather box...

I'm using a MBC so with the stock ECU, I wasn't able to boost too much before reaching fuel/Ign cutoff and I'd get an CEL with an overboost code. So......being an older car and one out of the 3 that I own, I really didn't want to spend $800 from IPD and discovered the InMotion chips via Ebay (discus...

Yesterday I added 2 more qts (had consumed 3 qts total) and it drained normally so I don't know why the one seemed strange the day before, perhaps I just dumped it in too fast? I doubt that anything had to do with the Mobil 1 now. I replaced all the clogged PCV hoses, breather box, cleaned the gunk ...

The first thing I noticed after switching to Mobil 1 (10w30) was occasional smoke from the exhaust on decel. I'm in the midwest so it's now super cold out and this car sits outside, not garaged. Recently I drove it and noticed that it was smoking even more than before. I opened the fill cap with it ...