ORIGINAL: trstein
hobbsy, it's Byron Fuel that is supposedly good for planes, boats, and heli. Does not specify syn-castor blend ration. Just states that it contains 20% total oil. Runs great in my .46 2-stroke, and seems to run in the OS .91 4-stroke just fine, although I have only run one tank through it on a test stand to date. If anyone has thoughts on fuel brands or such, it would be appreciated. Thanks
Keep using it, you should have no problems with it in either engine. I looked on the Byron web site and pasted part of the info here.
http://www.byronfuels.com/pages/abou...and_nitro.html
Synthetic/Castor Ratio: The ratio of synthetic to castor is engineered specifically for the application. Performance Blended Premium Sport Fuels are blended with an 80:20 ratio of synthetic to castor. RACE Fuels (except RACE 1500) are blended with a 60:40 ratio of synthetic to castor.
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OS recommends
minimum oil content of 18% for the four stroke. The extra oil will not causeany harm.