ORIGINAL: hpi apollo
has anyone had problems with engines that have internal one way bearings and run high castor oil fuels?
Not so far. My son is using 20% castor and zero nitro in his pull start .28 car engine (Hyper 7) and I must admit I'd never even considered there could be any problem. So far I think he's only run about 4 or 5 litres through it though.