Sea Foam and ethanol in classic muscle cars [SOLVED]

Hi Joseph,

Thanks for the question. Yes and no. Sea Foam Motor Treatment will slow the degradation process of fuel, ethanol blended or not, and stop the varnish and gum residues from building in the fuel system. Sea Foam Motor Treatment’s petroleum ingredients will add protective lubricity to fuel system parts as well. Sea Foam will not change the fuel quality or ethanol content in “good” fuel.

No matter what kind of fuel you are using, know that Sea Foam in your fuel is always working to clean and lubricate your fuel system.

Hope that helps and let me know if there’s anything else!

My 1964 GTO has developed a fuel system problem from sitting for prolonged periods. No fuel was getting to fuel pump. I removed inlet line at fuel pump and ordinarily gas would be pouring out but there wasn’t a drop. That said to me there was a clog in the line, likely at the pickup tube. I removed fuel tank cap and took an air compressor nozzle and forced air back through line. When I removed compressor line fuel began running. I reconnected to fuel pump and car started right up and ran for about 10 minutes before it apparently clogged up again. Did the same thing again and it ran again until line clogged again. Will SeaFoam help dissolve the deposits that have apparently formed in the fuel line or pickup tube? I really don’t want to have to pull the tank or the sending unit. Thanks.

Thanks for the question. If it’s caused by varnish deposits, Sea Foam will help clean them up. Try running your GTO on a high concentration of Sea Foam High Mileage (1-2 cans in 2 gallons of fuel, or higher concentration).

If the clog is caused by something else, unfortunately Sea Foam won’t help in that case.