Originally Posted by
houston
some of the fuels being made troday are NOT being made for engine longevity but rather performance at any cost . they are using high synthetic to castor oil ratios and some even use 100% synthetic oils which requires a drastically leaner needle setting than other fuels with some natural castor oil.
another thing , i get engines in here that run many different fuels so i get to see first hand what how much of what kind of fuel does what or doesnt do what to the internals of your micromotor . from what i have seen , i have deduced that 100% synthetic oil fuel is NOT good for your engine , i repeat NOT good for your engine !!!

i know of 3 companies at least that use full synthetic oils in their fuel .
so i dont know about you but i have to purchase my engines , i am not 100% sponsored by anybody but myself!!

and i would like to protect my engines

i use byrons 30/9 pro driver fuel , rbmods after run oil ,kyosho air filter oil , it seems to work and work well

Agree completely. In fact, for our high strung onroad motors, I like at least 6% castor. Not 6% total oil but at least 6% castor PLUS some amount of synth. Any less than that leads to early failures. This is why most of the onroad pros are adding castor to Byrons. 9% genII is only 4.5% castor.