Choice of fuel
My question is that if I have to make a choice between 91 octane Unleaded Mogas or standard Avgas, what would be the preferred fuel. It may only be used to top up the tank to get to the next destination. I would never use either of these fuels exclusively.
We are all flying with 914 engines and always use Premium grade 98 or 95 unleaded Mogas and only use Avgas if we have to.