One of the best ways to improve your gas mileage is by replacing your spark plugs, but by how much do you exactly improve your mpg? In this video I am going to replace some 100,000 miles old spark plugs with new ones than measure the difference in improved MPG and calculate approximately how long it would take to pay off the cost of the new spark plugs with the money you save by the improved mpg.


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Due to factors beyond the control of Ratchets and Wrenches, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Ratchets and Wrenches assumes no liability for any property or personal damage that may arise from doing a repair on your vehicle after watching any of my repair video's. Due to factors beyond the control of Ratchets and Wrenches, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Again Any injury, damage or loss that may result from improper use of tools, equipment, or the information contained in this video is the sole responsibility of the user and not Ratchets and Wrenches.