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Regular
Posts: 52
| Hi everyone,
Searching didn't help, but I may have just missed a result. I just bought a 56 Belvedere and before I get too far into this thing I'm wondering if I need to run leaded additive in the fuel or if unleaded is fine. Thanks for the info for anyone who responds. |
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Expert 5K+
Posts: 9665
   
Location: So. Cal | Leaded would of course be better, but I can't be bothered with that so I just run unleaded, and when it eventually needs to be rebuilt, I will put in hardened exhaust seats. They will run fine without it for many thousands of miles. Typically, we don't put $150k miles on these cars so you may never need to worry about it. |
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Veteran
Posts: 148
Location: Mandurah, Western Australia | You can protect your exhaust valves by using lead substitute Flashlube additive to the unleaded fuel, either add 50 ml per tankful or install a dosing unit. You may also need to adjust ignition timing a bit |
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Extreme Veteran
Posts: 580
| If you have the flathead six cylinder it already has hardened valve seats and no gas additives are needed. |
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Regular
Posts: 52
| Thanks guys. I have the v8, and I'm going to run a compression test this week to see what it looks like. I'll go with the additives suggested, really appreciate it |
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Expert
Posts: 2905
Location: little rock, AR | Non Ethanol fuel. Make sure your using fuel injected fuel hose. Ethanol eats up rubber. Destroys fuel pumps. The list goes on and on.
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Expert
Posts: 4040
Location: Connecticut | No additives needed, assuming you have a small V8 in there. Ron |
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Expert
Posts: 1267
Location: San Antonio TX | oldwood - 2019-03-04 12:03 AM Non Ethanol fuel. Make sure your using fuel injected fuel hose. Ethanol eats up rubber. Destroys fuel pumps. The list goes on and on. This. Ethanol is a bigger concern for you than unleaded fuel. If you can't get ethanol free, consider using an ethanol treatment to help negate the effects of ethanol. https://www.pure-gas.org/
Edited by drosera88 2019-03-06 7:13 AM
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Fuel / gas type for 56 Plymouth