Originally Posted by CanyonCarverR1

Unless I'm going to run the engine again within 3-4 days, I always run all the fuel out of the tank then run the engine until all fuel is consumed. I tear the engine down completely, spray it clean with Nitrowash or similar, coat all parts liberally with Mugen after-run oil, then re-assemble. The fuel is very corrosive, plus I like to inspect it to look for possible problems and to learn how it's running.