Our fuel has more than just Nitro... Some have color added, some have a mixture of synthetic oil and castor, as well as some other additives. What causes the rust? Not sure, but there is something that keeps it inside motor and absorbs it.rocket wrote:... An interesting side note, with Fai fuel there is no Nitro. We usually don't use after run oil. If you disassemble one a week or even a month after the last one you don't find Rust. Completely coated with Castor on the inside. The only difference is the Nitro. You hear rumors about the alcohol evaporating out and leaving moisture if that was the case why don't the FAI
Motors rust like quarter midget and quickie Motors.
DK