So I have two old blowers that run pretty well. However they have almost no compression. one is 60 lbs the other like 75#'s. My dealer told me that they were designed for leaded gas and since there is no lead now to add a little 2 stroke oil to lubricate the top end. Ive been running them on 100/1 synthetic 93 octane. Will a valve job increase me compression and running reliablility? How hard is it? I have never oped up one of the but I do rebuild chainsaws from the cases up. Any thoughts of wisdom. They do die in the heavy snow and I want to power through that crap. The one with the lower compression actually runs better than the higher one but I have to keep playing with the carb on the bigger one to keep it running sometimes. They also both burn a dipstick oil on every tank from full to add. Thanks for the help!!!!