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Rc Fuel Faq

Old 04-11-2009, 11:16 AM
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Default RE: Rc Fuel Faq

sorry if this has been asked before, but what is the proper way to dispose of nitro fuel? I have about 1/5 gallon left that is almost 1 year old.
Old 04-11-2009, 12:13 PM
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Default RE: Rc Fuel Faq


ORIGINAL: GlassBullet

sorry if this has been asked before, but what is the proper way to dispose of nitro fuel? I have about 1/5 gallon left that is almost 1 year old.
Before you try to dispose of it, Try and run it. If it works, use it up. I have never thrown out fuel because of it being old. If there is moisture in it the engine will either not run at all ,or it will run poorly, if so then throw it out. I've had some fuel as old as 10 years old and it still ran well even though there was only 1/2 a gallon.
Old 04-11-2009, 12:59 PM
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Default RE: Rc Fuel Faq

alrite thanks. i'll give it a try.
Old 04-11-2009, 01:02 PM
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Default RE: Rc Fuel Faq

I use the old fuel for break in fuel
Old 04-11-2009, 07:39 PM
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Default RE: Rc Fuel Faq


ORIGINAL: w8ye

I use the old fuel for break in fuel
does it being old make it better for break in or something?
Old 04-11-2009, 08:22 PM
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Default RE: Rc Fuel Faq

Bad fuel,

you can never get the HS needle peaked out and the engine will not run without heat on the glow plug. This is all OK for break in. You can leave the heat on and leave the engine rich.

If your fuel does not follow these parameters and runs OK, then it is OK to fly with it
Old 04-11-2009, 08:47 PM
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Default RE: Rc Fuel Faq

by heat, you mean the glow starter, right?

and i should have mentioned that this is fuel for a car. does that change anything?
Old 04-11-2009, 08:57 PM
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Default RE: Rc Fuel Faq

Glow starter is heat

Car fuel does not have enough oil for a airplane engine

If you are going to use the fuel you need to get some oil at the hobby shop (Castor oil) or buy some at the drug store
Old 04-12-2009, 12:27 AM
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Default RE: Rc Fuel Faq

no no no. it's car fuel being used in a car. no airplane anything involved. sorry for the misunderstanding.
Old 04-12-2009, 12:34 AM
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Default RE: Rc Fuel Faq

Well heck, if it will run use it up. Don't worry about it
Old 04-12-2009, 10:59 AM
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Default RE: Rc Fuel Faq

hah ok will do. thanks again for your help
Old 05-12-2009, 04:52 PM
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Default RE: Rc Fuel Faq

I'm trying to mix fuel for my buggy/truggy .
I have bought:

5 gallons of Methanol
1 gallon of nitro methane
2 pints of castor

I could not find a synthatic oil. The motorcycle shop I went to didn't carry it at all. Where can I find any synthatic oil? is synthatic same as the motor oil (5w-30) or marvel mystery oil?

Also I read on here to add 1 ounce of Propylene /gallon of mixture to make the idle more consistant. Some people are also suggesting adding aceton and armaroil, are those necessary for my application?
Old 05-14-2009, 04:09 AM
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Default RE: Rc Fuel Faq

Propylene Oxide is very dangerous and is banned by the American hot rod association. It boils at 34C (about 93F), has a flash point of -37C (about -35F) and any vapours can explode within an extremely wide range (2 to 37% !!).

Acetone isn't necessary because you'll be using nitro. Armorall stops foaming of the fuel in the tank from vibrations and all that's needed is one quick squirt into a gallon of fuel. Your engine will love the castor, it'll protect the rod bushes and stop the bearings from rusting too.
Old 05-14-2009, 12:05 PM
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Default RE: Rc Fuel Faq

You are better off ordering your oil from Morgans, Sig, or Fox Manufacturing that from a motercycle shop. It will cost much less, and you don't have to worry about confusion about which oil for alcohol powered engines VS gas.
Old 05-14-2009, 01:34 PM
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Default RE: Rc Fuel Faq

ORIGINAL: downunder
Armorall stops foaming of the fuel in the tank from vibrations and all that's needed is one quick squirt into a gallon of fuel.
I've found one drop per liter is just about right. More than that it might precipitate out.
Old 05-14-2009, 02:51 PM
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Default RE: Rc Fuel Faq

I don't know how much to put in but I do know if it is too much it will coat the element in the glow plug and it idles and runs horrible. I got a bad gallon once and had a to speak to the fuel engineer about it.
Old 05-14-2009, 09:04 PM
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Default RE: Rc Fuel Faq

hi new to the R/C truck stuff (duratrax rtx with supertiger 4.4 cs) and am amazed at the cost of fuel. I bought a gallon of trinity monster hp 20% nitro at 30.00 a gallon for break in and playing but have ran out. Now I am having great difficulty finding fuel other than traxis at 15.00 per quart so I read all the post here and used some common sense (ie 20% 99% pure nitro and 62% 99% pure methanol and 18% oil (75%syn 25% caster) is the same no matter what the intended vehicle type states on the bottle). I have decided to buy the 17.00 gallon of airplane fuel and give it a try. I did not make it to the hobby shop so I called duratrax support to make sure it would not void the warranty and they stated 18% oil is there recomendation and the fuel would be fine. The tech did say not to use traxis fuel in there truck. I had bought 1 quart of traxxis when I first ran low on fuel and had a very hard time getting the engine up to operating temp (half a tank) before it would shift then hard to keep temps under 330 could the problem have been from the fuel itself or may I have hurt something already
Old 05-14-2009, 09:12 PM
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Default RE: Rc Fuel Faq

I have read all threads and only saw one snipit about boat engines I own a kb 3.5cc outboard and a duratrax rtx with supertiger 4.4 is there a fuel that will work for both. I do not race as I know no others in my area with the same interest although I have found Embassy raceway only 25 miles from my home to play with the truck.
thanks in advance Gary L Sundman
Old 05-14-2009, 09:36 PM
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Default RE: Rc Fuel Faq

15% nitro model airplane fuel should work fine in both engines. It normally has 18% oil
Old 05-14-2009, 10:09 PM
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Default RE: Rc Fuel Faq

My son uses simple home brewed 80/20 methanol/castor fuel in his car engine and it works perfectly. With a standard engine it's slightly down on power but if you're not racing you'd never know. My suggestion for your car and boat engines would be to get some plane fuel (usually has more oil than car fuel) with a low nitro content.
Old 05-14-2009, 10:36 PM
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Thanks for the replies will follow the thread but now wondering about the venom fail safe with temp sensor? anyone use one? and what is the proper way to get an abc engine up to operating temp????? Gary sundman New Carlisle In.
Old 05-14-2009, 10:51 PM
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Default RE: Rc Fuel Faq

Run it hard
Old 05-16-2009, 11:18 PM
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Ran 1 tank of wildcat 15% nitro 18% oil (80%syn 20% degummed caster) 18.00 in my rtx (4.4 cs supertiger) after a complete tear down and resealing with copper permatex to the back of the engine and fuel inlets. Also used losi green slime to the needles and output shaft to the rotostart. Seemd like the needles both had to be opened considerably more than factory but it ran like a scalded dog once I richened it to stop bogging at the shift point with wot. Refilled the tank and switched glow plugs and the rotostart did not function right so I will be trying again tomorrow when I get the engine back in. (rotostart works after cleaning the one way bearing) </p>

Gary L Sundman</p>

New Carlisle In.</p>
Old 05-16-2009, 11:53 PM
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Default RE: Rc Fuel Faq

Good luck
Old 06-11-2009, 08:33 PM
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Default RE: Rc Fuel Faq

well after a half gallon of wildcat 15% nitro 18% oil 75%syn 25% caster truck is still running great and easier to keep tuned to keep temp 300 and under, usually shoot for the 270 mark as recomended by mfg but it sure sings at 300   Gary

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