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Recycled fuel

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Old 19th Dec 2008, 14:25
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But it's a good fuel for those vehicles that pre-date catalytic convertors. Legal off the public highway only, of course
One had a Mini that was breathed upon and became almost a par with a Cooper (engine wise, brakes howerever....another story) and it did just fine on 110 out of the planks in the hangar. At 11.5:1 compression, Avgas was like mother's milk and there was a standing order for any and all samples. Then I got to know the fellow who ran the pumps to fill the piston planes, Ahhh, bliss!
Now the 1978 Moto Guzzi enjoys the benefits of 100LL when possible.
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Old 19th Dec 2008, 18:20
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I recycle all clean-looking sampled bowser fuel back into the bowser.

I keep my bowser inside my hangar under cover. It keeps the hose dry and reduces the chances of condensation being a problem. The fuel fraction I worry about is the 1L or so trapped inside the hose after each refuel. Replacing the cap on the pump nozzle reduces the chances of crap and moisture getting up the hose but this is presumably the bit of fuel trapped in the hose that is most at risk of being contaminated.

Having read about some of the highly dodgy fuel put into an R44 by those 2 blokes that flew to Oz a couple of years ago, I'm pretty confident that you need a LOT of contamination to cause combustion problems.

BTW My father ran his Austin car on avgas 100LL in the 1960s. It worked really well until it destroyed the engine.

SB
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Old 19th Dec 2008, 18:56
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Not surprising! It contains so much tetra-ethyl lead that it should be diluted about 10 to 1 with low lead / unleaded. In an engine not designed for it it can whisker spark plugs (aero engines use surface discharge plugs which are less prone) and cause build ups on the back of exhaust valves and on piston tops.
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Old 19th Dec 2008, 19:00
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CAP748 Aircraft Fuelling & Fuel Installation Management

CAP748
Chapter 2
Para 1.1
"Sampling checks should be made throughout the fuel handling, storage and distribution process to ensure that the fuel is free from water and solid particle contamination, is of the appropriate grade, and is in a state fit for use by aircraft."

Para 1.3
"Samples should be taken and retained for a minimum of seven days"

Para 1.6
"Fuel that is not to be retained and is found to be free of contamination can be returned to the tank."

BTW My father ran his Austin car on avgas 100LL in the 1960s. It worked really well until it destroyed the engine.


FYI. It would have been 80/87, 100/130 or 115/145 - all of them full-lead, full-fat. 100LL was introduced in the seventies.

TRC
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Old 20th Dec 2008, 00:27
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BTW My father ran his Austin car on avgas 100LL in the 1960s. It worked really well until it destroyed the engine.
If an engine is running 10:1 compression or higher then Avgas is the ideal food for it.
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Old 20th Dec 2008, 09:49
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If an engine is running 10:1 compression or higher then Avgas is the ideal food for it.
From an anti-knock point of view, I would agree to some extent, if you can accept the plug fouling problem and its propensity to attack some types of sealing materials.

Not all engines of 10:1 CR or above need that high an octane rating, especially if they have an alloy cylinder head on a small cylinder size. One of my engines is well above 10:1 and certainly likes a dose of a gallon or so in the tank, but I would never run it on 100% AVGAS because I've found there's really no need.

Anyway, it's illegal for road use.
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Old 20th Dec 2008, 13:54
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Used in a 50/50 mix it works a treat in Land Rover 5cyl Turbos, or add a good quart of Derv/Turbo engine oil if used in greater mixes, did 45k in my LR 5TD with no bad side effects whatsoever, like wise ASDA Cooking oil is also a good alternative but still needs a 50/50 split, smells a bit like Harry Ramsdens but its still cheaper than paying thru the nose to the Labour Party's favourite charity!

Vfr
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Old 20th Dec 2008, 14:29
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BTW My father ran his Austin car on avgas 100LL in the 1960s. It worked really well until it destroyed the engine.



FYI. It would have been 80/87, 100/130 or 115/145 - all of them full-lead, full-fat. 100LL was introduced in the seventies.

TRC

Then the engine must have died of lead poisoning

SB
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Old 20th Dec 2008, 18:42
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Jet A1

I know a few people who have run their diesel cars (from older Ford TDs to newer CDi Mercs and Land Rovers) on a mix of 50% Jet A1 and 50% Diesel for many many many 1000s of miles with no problems whatsoever.
Most of them maintained they had better power with that mix than straight diesel!!!

Chester

ps. I once knew an instructor who used to add a few gallons of avgas 100LL
to his turbo diesel car. I wouldn't recommend it but it worked for him!!!

Chester
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Old 20th Dec 2008, 23:22
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Just Jet A1

I was on a heli logging operation in Sarawak where the diesel engined truck that moved the big fuel pump around to the logging area rarely got diesel in it. It run 99% of its time on Jet A1. Plenty of power and smooth running.
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