JJthegreat

Anyone know if 15% Omega would fire up a Cox 0.049? Cox fuel isnt available in my area and looks pretty expensive. Some people say it looks like you need 20% with 20% oil content. Any ideas?

rctimm99

My Feedback: (34)

I user Power Masters 15% nitro / 18% oil...just fine Also used all syn 15% / 18%
Tim

ZAGNUT

My Feedback: (1)

the lhs over here sells a 10% nitro, 16% klotz benol mix for the cox engines used on the trainers they usually start new flyers with. tried it in the past and allways ran good but nowadays i use a 25%/25% mix to get a little more power and hopefully longer life.

dave

JJthegreat

Ahh good, so you dont really "need" that 30% fix for it to just run?

SpaceCase

My Feedback: (4)

Use 30% nitro with a lot of castor erl in it. Those engiones like high nitro content, 15% should be ok though, lots of castor though, hot will burn em up.

downunder

15% nitro should be fine but you ABSOLUTELY need castor in the Cox engines. You might get away with a 50/50 mix of castor and synthetic at 20% total oil content but you'd be safer with all castor. If you run it with the Omega then you'd better have a ball joint reset tool handy

These engines use a ball joint to connect the rod to the piston which allows the piston to rotate and castor is the only oil that will stay in place under these extreme conditions.

blue62

My Feedback: (3)

if ya buy cox fuel you get 25 or 30 % nitro wonder why they sell it that way. maybe they know what works best in their engines. they really dop run better on high nitro, i think its because of the iron cylinder and steel piston. hence the need for the castor also


john