Low compression on all cylinders?

[SpeedyRu08]

2005 LGT ej255 is burning oil like no one's business, particularly under boost. I started diagnosis with a compression test and the results were:

Cyl 1: 90

Cyl 2: 60

Cyl 3: 80

Cyl 4: 45

I did the test with the engine completely cold (car was sitting outside in 40⁰ weather) and throttle closed so I was expecting the numbers to be a bit lower than usual but not this low.

The engine runs pretty damn good and doesn't even have a check engine light.

It was rebuilt in 2013, it has a BNR 16g turbo and Cobb catless downpipe. Any thoughts? I plan on doing a leak down test tomorrow.

[Max Capacity]

Have you replaced the PCV tree, that has been the cause for oil usage in some cars. NAPA has one for little money.

 

I replaced mine a few weeks back.

[Pleides]

Not all compression gauges read the same, but if yours is anything to go by, even if we multiply all of your compression numbers by 3 to get something more normal, your fourth cylinder is fucked.

[silverton]

recheck the compression when the motor is at operating temperature like you're supposed to.

 

with 4 being that low, it should sound like it has a dead cylinder when cranking.

[leetdrv]

the No4 issue could be a tight valve clearance, when was the last valve adjustment?

 

however, if the oil burning issue is not PCV related I bet you're rings are done.