caster oil

Yep, just make sure it says 100% USP with no added sugar. Sugar will murder your engine.

I buy it occasionally to mix with car fuel.

Stimulant/Laxative, funny it goes right through our engines as well.

If you need it as just an additive to raise the content a few percent, that will do the job just fine. But if you mix fuel in larger quantities, you should get de-gummed castor racing oil like Klotz. That's the brand Sig uses in their fuel. There are others too.

thanks again guys for the quick feedback,dont know if id still be into cox stuff if i hadnt found this site!!

As Rusty pointed out, Klotz is one of the primary suppliers for model fuel lubricants, SIG included. Klotz is the company name and they manufacture a host of lubes ranging from pure synthetic to synthetic/castor blends to pure racing castor oil. What you want is BeNol --- it's an all castor lube with some anti-corrosion and color additives. The Klotz lube listed on SIG's site is Techniplate, a synthetic --- don't use this. If you order from SIG, buy their pure castor.

Since you live in Charleston, there should be a host of motorcycle and kart shops catering to racing. Many of these shops likely carry Klotz lubes and some should have BeNol. Just let your fingers do the walking.

Hyperracing

Moto-Man

Klotz Lubricants

We sell castor oil (SIG brand):

http://coxengines.ca/castorlube-castor-oil.html