If I remeber correctly we discussed the 4/2 stroke battle quite wellin your previuos Avon/Ring thread so there is no point going in to it on this one.
The bottom line is the difference in the cost of fuel will be very small and I think the choice is personal. It's like the difference between the Corrs (beautiful, desirable supremely talented, perfumed) and Lynnyrd Skynnird (hairy arsed, supremely talented , smelly and needed expensive fluids/substances to perform well) both produce excellent quality cd's but only one of em performed Freebird
For me it's a no brainer get the Opti. The Avon will take the power and like any situation in life having a bit in reserve won't hurt.
we did 300 hours plus on our Opti this year most of it flat out and loaded with people. I have just checked the accounts and we spent 170 quid on Opti juice, ( I then bought a 45 Gall drum at the end of the season which I have only started to break into)
That's me I am done
Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
Pullin' me back to you - Deja Voodoo