F850 help
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4wd Low
Joined: Apr 2025
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If it's not run much, and if you have it available in your area, consider paying the extra coin for ethanol-free gasoline. The fuel systems in these old trucks are not ethanol-safe. If you run them constantly, that's not much of an issue because the ethanol stays blended, but if they mostly sit the ethanol blend fuels will absorb water from the air, eventually triggering a phase change of the fuel, and the ethanol will separate out. Then it corrodes many parts throughout the fuel system, esp. the carburetor. Many, many older carbs have been ruined by ethanol.
Where I am, ethanol-free fuel is widely available, for about $0.80 more per gallon. I buy a lot of it for my OPE (outdoor power equipment). I don't buy it for my truck, because even though it mostly sits, I treat the fuel with a stabilizer designed for marine + ethanol use. Sta-Bil has (or had) a blue-colored formulation for that, but I've switched to Pri-G -- a competing additive -- these days. It's not a lot cheaper than buying Ethanol-free fuel, but the stuff also makes the fuel not go stale as fast, so it has that benefit over ethanol-free.
Where I am, ethanol-free fuel is widely available, for about $0.80 more per gallon. I buy a lot of it for my OPE (outdoor power equipment). I don't buy it for my truck, because even though it mostly sits, I treat the fuel with a stabilizer designed for marine + ethanol use. Sta-Bil has (or had) a blue-colored formulation for that, but I've switched to Pri-G -- a competing additive -- these days. It's not a lot cheaper than buying Ethanol-free fuel, but the stuff also makes the fuel not go stale as fast, so it has that benefit over ethanol-free.
Cheers!
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Joined: Apr 2004
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Is there a tag on it somewhere? Anything stamped on it? Tanks are supposed to have that info, but being this old it's possible it predates the requirement.
Otherwise, gather the dimensions and do a little geometry and math, and find a cubic inch or cubic foot to gallons calculator and you'll have your answer.
Otherwise, gather the dimensions and do a little geometry and math, and find a cubic inch or cubic foot to gallons calculator and you'll have your answer.
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