2010 XC60 with 160K miles. Previous posting - engine lost compression, ~10-15 PSI in 1,2,4,5,6 and 40 PSI in 3. Oil in the cylinders brought it back up to 145 PSI in all.
Previously, Foreign Sports ($215) said it was the air-oil separator, replaced that, still misfiring. Got nothing more from them. After replacing the plugs, coils, injectors, MAF sensor, Air-Oil separator, intake seals and cleaning the throttle body I still had a misfire.
Took it to Rusnak Volvo and said I wanted to know what was causing the misfire. I told them all I had done. They came back with pistons and rings do not hold compression and oil mist. Rebuild engine for $25,331.63. Also gave a list of things that needed replacement - front wiper blades $170.60, rear wiper blade $85.45, battery $542.21, coolant $384.11, power steering fluid $322.11, tie rods $789.53, rear brake pads $1093.60, alignment $270.00, power steering cooler hose $1339.99, rear sway bar links $766.27
I did not ask them to give me a list of everything they could replace. I measured the cylinders at 145 PSI, which is a little low but should not be causing a misfire. You can smell fuel in the exhaust. The engine does not smoke and the plugs do not show much carbon. A waste of $271.
A 100K miles engine is $1200, a crate engine is $12k. Carmax says a running 2010 XC60 is worth $1000.
Are people really dim enough to pay $170 for a pair of wiper blades that costs $22 (Bosch) retail?

 

Update on misfire. I sold the car because I could not smog it with the misfire. The guy had a mechanic come out and in about 20 minutes of checking he said "I think the coil plugs for cylinders 1&2 are reversed. He swapped them and the misfire was gone.
This probably happened when I either put oil in the cylinders to bring the compression back up, was changing plugs, measuring compression, changing coils or something. The original misfire was likely due to the air-oil separator diaphram having a tear and the coil plug swap just added to it so I did not see it as the cause of the misfire.
However, Rusnak Volvo claimed they measured the compression and stated that the compression on cylinders 1&2 was low and that was the cause of the misfire. They had no written measurements of the compression and I wanted a record of the compression. They gave me a piece of paper with numbers, probably picked out of the air.
Checking the plugs, they were clean on cylinders 1&2 and had soot on the rest.
Apparently the mechanic does not know the order of the coil plug connections and plugged them back in the way they were, which was WRONG!
I sold a serviceable car for much less than it was worth.
Do not trust Rusnak for any service, besides the idiotic prices they charge for parts and labor.