If I were you, I'd take 3 ounces of the 10/20 fuel that you already have and mix with it 3 ounces of straight methanol. This will give you 6 ounces of 5/10 glow fuel (5%nitro, 10%oil). Then add 12 ounces of straight high test gasoline for a total of 18 ounces, which will be plenty for a good test run. The nitro would be rather low, but it may run just fine. If you don't get good results, then you need to locate a quart of RC car or boat fuel with a high nitro content and 10% oil content such as 30/10. I think you can order a quart from Tower and not pay the high HAZMAT fees. Anyhow, if you go this route, you would mix 3 ounces of 10/20, 3 ounces of straight methanol, and 1.5 ounces of 30/10 to get 7.5 ounces of 10/10 glow. Then add 15 ounces of high test gasoline for a total of 22.5 ounces which will again be plenty for a test run. I typically don't mix more than about a half gallon of fuel at a time so that it won't go bad before I use it. Send me a PM and I can e-mail you a spreadsheet that would help you with your mix.