The low compression, if not from engine damage, is from sticking rings and this takes some time to work through. Seafoam poured directly into the cylinders and left to soak overnight will eat the deposits and unstuck the rings quickly. Deep black smoke after the restart is expected. It is the carbo...

The answer to your question involves how much work you want to put into the vehicle. My concern is the oil pressure warning - it could be just the oil pan o-rings. Most of the time that is the issue. It could also be sludge which will be addressed. First thing I would do is drain the oil and look c...

With nothing to lose, maybe I could try letting it sit for a week? with 4- 5 litres of diesel fuel in the the crank to dissolve the sludge from the oil passages, pickup/ oil pan. I could add some on top of the cylinders as well. If I crank it over once or twice every day with the spark plugs out it ...

What would you do with this xc90 if it were yours? ..I recently got a 2006 XC90 2.5 T5 from my boss..for free. He said it needed a battery and alternator. I had it brought home on a flat bed tow truck and changed the alternator $280 and recharged the battery (which was brand new last year.) runs and...