I agree with you both, my existing fuel is probably fine (I never had any fuel "go off" - ever). But I live in the UK and when (or if!) I return my VMax-7 to Lite I want to know that I've given it "every opportunity" to actually fire-up and run. It wouldn't look very good if Lite simply dripped a little of the "correct" fuel into the carb and found my engine ran perfectly, if you see what I mean

I'm thinking I should add 10 fluid ounces of nitro to 50 fluid ounces of my 10% nitro fuel. If my maths is correct (and it may not be) this will make the fuel around 25% nitro and just short of 17% castor

If my maths is sound, and if I get to ok from Lite to do this (without invalidating the warranty) . . . . is anyone running 25% in a V-7 and if so, how many washers are you using?

Tony