Review on π₯ High-Performance Set of 4 OEM SP509 Platinum Spark Plugs - Boost Your Engine by Martin Alvarez
Engine ran smoother and fuel economy better
How can you rate the product of a binary state: either it works or it doesn't work. These were original Motorcraft spark plugs made in Japan. As promised they fit my Ford F-150 with a 5.4 liter engine and after 65,000 miles with the original spark plugs the engine ran smoother and fuel economy improved. Very satisfied.
- Test for one year
- No power
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