Based on my research, because of the altitude I'm at (6,700 ft), any compression tests will read about 18% lower than at sea level (a huge relief as now my compressions levels are actually OK and I don't need rings).

Would the same correction also need to be applied to oil pressure readings because of the altitude?


Thanks

 

this is only an issue when a car is imported but in most cases it has to be or has been setup for the altitude and the baro sensor will soon throw a fault code if its not right so I wont worry about it