ORIGINAL: Flyboy Dave
There is no reason why a slightly larger displacement S.T. engine
must have fuel with a lower oil content. That is an Internet myth.
The big Tigers have the same ball bearing crank and plain bushed rods as the other S.T. engines.
MY S.T. 3000's run fine on 15% nitro. They are
not high compression engines, and they need
not be run on low nitro fuels. They run fine on standard 15% nitro, 18% oil fuels.
I have not experienced any detonation or overheating on my big Tigers on 15% nitro.
FBD.
Each to his own, but why use expensive fuel when the big Tigres run fine on an inexpensive 0-5% nitro / 12% oil fuel using an OS F glow plug?
At least in Europe where nitro is very expensive a lot of money can be saved by following the
recommendation by the manufacturer to use fuel with low oil and nitro content.