With the price of gas flying higher than a kite has anyone out there considered running a lower octane in their supercharged GT/GTP?

My brother owns a Chevy Silverado with the V8 in it and he runs on 87 and gets all the power and performance he needs.

IF, and this is a BIG IF, I were to run on a lower grade fuel - what preventitive maintenance should I plan on doing to keep the engine from getting build up of garbage from not running on high-test.

"Soon to be broke in Syracuse"

Thanks!