Veco

My Feedback: (28)

Hi; I am running a 20% castor syn. mix fuel and I want to boost the castor oil content to make the oil content 23%. Does anyone know how to figure how much castor to add to one gallon of fuel to bring up the oil content to 23% ? Thanks

splatt

128 oz. in a gallon.... 12.8 oz. would 10 % 1.28 would be 1 %

1.28 x 3 = 3.84

My brain would say add alittle less than 4 oz. and you'll be there. But than again I don't rely on my math to save my life

splatt

I'm doing the same thing. I got a MDS .78 for 60 bucks from the LHS and the "theys" of the world say to have a higher caster content for these russian engines. So I got some caster to add to my mix too, makes 'um run alittle cooler since castor can carry the heat out the exhaust pipe. Just alittle messy

Veco

My Feedback: (28)

Thanks, I will add around 3 1/2 oz. per gallon

XtremeNitro

by adding oil to the gallon u no longer have a gallon of fuel. a gallon is 128 oz and if u add 3 or 4 more ounces u have 131-132 oz which makes all the percentages of the fuel wrong on the bottle. u may want to consider this. between 20-23% oil it won't make a difference if it is a good quality oil. i market my own fuel and for planes i run 12%, heli's 18% and cars 8% and most engines i have seen do more than 6 gallons of fuel. my own personal engine runs on 6% oil and it has 9 gallons thru it so far and still going.

rajul

My Feedback: (58)

Try using Klotz Benol castor oil, if you can get your hands on it. It's the best there is

hauckf

Xtreme is right about the calculation. To increase the oil content from 20% to 23%, you would need to add 5 oz of oil, not 3.5 oz. The formula for calculating it yourself is as follows: Oz of oil to add to one gallon of fuel = (D%-S%) x 128/(100-D%), where S% is the starting % oil, D% is the desired %. In your example, 3x128/77=4.99. I agree Rajul about Benol too.

jessiej

Or if you don't want to do the math go to www.nitrorc.com. Click on Custom Blending Workshop. At the bottom of the page is a realy neat program that allows you to come up with any % of oil, nitro etc. by simply plugging in a few numbers.

jess

rajul

My Feedback: (58)

Nothing like deriving equations from first principles

Veco

My Feedback: (28)

That is a nice little program on the nitrorc.com website. It makes adding oil to your fuel a snap, thanks

jessiej

I got my fill of equations in college, back in the day of the slide rule. I'll take the easy way out every trip of the train.