I would recommend any of the model tecnics fuels. The one that I tend to use is
the Bekra blend. This fuel features many oils from low temperature to high
temperature so even if the engine is running a little hot it will be protected
for longer than many fuels. This high temperature oil also has a funny smell
once burnt so its normally quite clear that the engine is running hot/lean.
If you are inexperienced with 4 stroke engines I would however add a few % of
caster oil to the mix. This will also help to protect the engine is you do
inadvertently run it lean.
