How do you guys check compression on a stripped down engine. I have a couple used engines with no housing for mounting a pull starter. I'd like to test the compression before going any further, but I have two questions. 1. If I use a starter motor to turn it over, will higher rpm's result in high/misleading numbers? 2. If the engine has not run in some time, the rings may not have the right amount of oil on them to create a seal. I could lube the cylinder walls, but would that also cause a wrong reading?