I think you can run as high of a compression as you want with pump gas if you weren't ever going to get on it.
Some of the big hitters on Drag Week run 15:1 compression, but they run race gas on the street all week. Curt Johnson is a prime example of this, and his 632 CI engine with LOTS of compression, runs race gas all week. He told us if he tries to run any type of pump gas through it, it will wash the rings out right away. He changes oil every day as well.
