Adding WD40 to Gas

by Jen Davis
David De Lossy/Photodisc/Getty Images

WD-40 is a lubricant that has a number of uses, including lubrication, cleaning and rust prevention. Some automotive enthusiasts also advocate putting WD-40 into the gas tank of a vehicle along with the fuel to help clean the tank and eliminate contaminants, such as water, that may be in the fuel. The effectiveness of adding WD-40 to your gasoline will vary, depending on the type of gasoline you're using and the type of fuel system your car has.

Step 1

Purchase a gallon-size jug of WD-40 liquid lubricant. Measure out eight ounces of the liquid in a measuring cup. Many people are familiar only with the aerosol cans, but the gallon bottle of WD-40 is preferred for this use; it's difficult to collect eight ounces of lubricant from the aerosol cans. Pour the WD-40 into a container that has a lid, so you can transport it to a gas station.

Step 2

Drive to the gas station and, after you park near the pump, prepare the WD-40 and funnel. Add gasoline until your vehicle's tank is about half full.

Insert the tip of the funnel into the gas tank. Pour the eight ounces of WD-40 into the top of the funnel, then finish filling your gas tank with fuel.

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