this guy runs a cb250 on vegetable oil

[colin1]

https://ratbike.org/docs/616.php

this seems odd to me as i thought only diesel engines could run on vegetable oil

what does he mean 10 to one ? is he using 10 part veg oil to one part white spirit or something ?
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colin1 is officially faster than god

[stinkwheel]

He's mixing it with the petrol in a 10:1 ratio.

Probably not recommended in the normal course of things.

I know someone who has run his MZ 2-stroke on a variety of fuels, including White spirit, BBQ lighter fluid and 50:50 meths and petrol. He has an SU carb fitted with a lever on the bars to adjust the main jet on the fly.

[colin1]

[stinkwheel]

Good question. Given how he only has a 2l bottle of vegetable oil, I would guess at 10 parts petrol to 1 part oil.

[colin1]

in that case, i wdnt be surprised if the oil isnt really helping and is more hindering, but i guess if his mpg doesnt drop, its working. I wonder if he has made a note to check.
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colin1 is officially faster than god

[Pete.]

I like that "Honest Johns 250 superdream - he runs it on veggie oil"

Perhaps he should think about changing his name to "Dishonest John"

[stinkwheel]

[Rob W]

[colin1]

[doggone]

Seems a bit unbelievable really.
You can add a percentage of cooking oil to older diesel engine's fuel (not high tech new ones, will soon cause probs without being set up for it)
For petrol you can add ethanol which can be produced from starchy material such as wheat and maize.
In the US this is quite widespread as ethanol can be made from maize which is for any reason unsuitable for feed, e.g storm damaged.

[stinkwheel]

Not as impossable as it sounds. I had an old russian 2-stroke that ran on 20:1 premix petrol and 30wt engine oil quite happily. It would in theory have been able to run on the same mixture of vegetable oil.

I know a couple of people who use veggie oil instead of 2-stroke oil so there is no reason why you shouldn't be able to run a 4-stroke on pre-mix. The inside of your engine would land up like a tar pit so you'd probably need a hotter plug, but you'd never need to replace a rusty exhaust.

[NinjaBoy]

[extreme3d]

[Squiffy_The_Wombat]

[Pete.]

Years ago my brother put R/C plane fuel with 10% nitromethane in a tomos moped. It went well but not far (only took him 20 minutes to push it back). We had to remove the cylinder head because the plug wouldn't come out.

[Squiffy_The_Wombat]

[Robby]

I always wonder about these stories about aeroplane fuel.

Avgas 100LL is just a 100 octane leaded fuel, like decent petrol. Most planes that run on avgas will run on normal unleaded petrol.

Jet planes run on Jet-A, which is basically kerosene, similar to diesel. Diesel engined piston aircraft also use Jet-A.

Aeroplane fuel is not some mythically powerful explosive magic fuel. Its just like the fuels you buy at a filling station.

[extreme3d]

[nrml76]

I knew someone who used to run his Jawa on a mixture of diesel or kerosine (whichever was at hand) with petrol. I dont know what ratio. He used to get excellent mileage, but acceleration was very poor and it was very smoky and smelt strange.

[Pete.]

Back then R/C model airplane fuel was a mix of castor oil, methanol and nitromethane. I think mostly it's synthetic these days without the castor oil.

[NinjaBoy]

[stinkwheel]

[Kickstart]

Hi

Biggest problem with methanol is that it burns with a clear flame, so the first you know about being on fire is the pain. And it is a cumulative poison, which can be absorbed through the skin.

Other problem is that it has a FAR lower energy content than petrol so you need one hell of a lot more of it. You need roughly twice the volume of it compared to petrol for the same amount of energy. Plus point is that it has a very high octane rating so you can put the compression through the roof (although you are then running into the possibility of getting a hydraulic lock in the cylinder).

All the best

Keith
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[binge]

I used to put a dribble of Castrol R motor oil In with petrol on my old Honda XL125. It didnt affect the running, but it did smell BLOODY nice!

As for running a scooter off RC car fuel. I persoanlly dont believe it because its not a flamable substance like petrol it. It ignites under compression (like a 2 stroke deisel engine).

<|Ben|>

[stinkwheel]