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Old 10-13-2019, 09:14 PM   #3
dbtenner
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Join Date: Jun 2013
Location: Texas
Posts: 84
Default 1936 Ford flathead - is a fuel additive required

I’m curious what others will say... I use 87 unleaded normally and 89 on rare occasions if 87 is not available. They say you have a cleaner burn the higher the octane and is more efficient. Maybe for newer cars that require the premium but not for me.

Ethanol free gas is the way to go for these cars since ethanol will break down over time and gum out and attack certain gaskets.

Then I use a lead substitute by adding 18mL per gallon of gas. Lead substitute acts like a stabilizer for gas by the way just don’t use it on modern cars. =P




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