DRonland

Hello Goirish,

Your Fox needs to run with at least 15% Caster. From there you can use Synthetic added to that mixture of15% Caster, around 8oz per gallon. Brings you to about 21%. Here is the deal: Synthetic oil has only a heat range of about 150 degress F, Caster has a heat range of about 400 degrees, so if your carbarator is not adjusted just right, the engine will not stay cool enough or last much longer. Only 5% nitro. I repeat only 5% nitro, fuels are different then the where years ago, here is a link that can help you: [link=http://www3.telus.net/fliteline/fuelprops.html]Fuel[/link]

Once you make or purchase this fuel it will good for your Bushing Engines(ie OS FP) it will make them last almost forever.

Also there is a modification you can do to the carb to prevent leanout in the 3/4 range of the throttle - a common problem with Eagle 1's. 2fast is right about the carbruator adjustments...low first. Why the synthetic oil then...it keeps the engine parts clean, otherwise with just staight caster you will have to clean it inside and out once and awhile.

Here is a link about the throttle: [link=http://www3.telus.net/fliteline/carbs.html]Throttle[/link]

Anyway...happy flying.

Here is a picture of my Eagle: [link=http://www.rcuniverse.com/gallery/galleryItem.cfm?itemID=117362&dummy=3582.084114794 9327&opener=/community/profile.cfm%3Fsection%3Dgallery%26memid%3D224806]Fox Eagle 1 - .60[/link]

Remember to keep your Fox clean! Thanks again Duke!
DRonland