But not use it on the road.
My friend got fined SIX HUNDRED quid last year for using Avgas in his V8 Landrover.......
No, I wasn't referring to the use of AVGAS on the road.
It's possible to buy tetraethyl lead additive and mix that with unleaded petrol.
The blue dye colour of AVGAS would tend to be a bit of a giveaway if that's all that's in the tank..
As far as using veggie or biodiesel in "any" diesel engine...not so in my car. The owners' manual specifically says it's
not to be used.