How To Figure Compression Ratio

Also unfortunate is the variance of 93 pump gas from station to station in any area.

My buddy hauls gas and on occasion will dump regular into the premium tank if after topping off the regular tank and there is gas left in the truck. They drive that truck till every station on their route has gas no matter how long it takes. He is a relief driver on Sundays and its a long day, 12 hours or more.