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Your cart is empty.The E3.72 auto spark plug is a high-performance 18mm, 0.430” reach spark plug designed with a taper seat, primarily for Ford applications from the 1950s to the 1990s. Featuring E3’s patented DiamondFIRE technology, this spark plug utilizes three legs to secure the DiamondFIRE electrode to the shell, ensuring superior heat transfer and promoting increased turbulence within the cylinder for better combustion. The unique DiamondFIRE side wire design has been proven to increase power, improve fuel efficiency, and reduce hydrocarbon emissions during long-term use. The full-size center electrode and specially designed ground electrode provide optimal performance and durability, guaranteed for up to five years or 100,000 miles. With a fixed gap that cannot be adjusted, the spark plug creates an edge-to-edge spark path through its DiamondFIRE open design, which allows the spark zone to be replenished with a fresh fuel/air charge while directly exposing the flame front to the piston head. This revolutionary design leads to increased engine power, improved fuel economy, reduced carbon monoxide and hydrocarbon emissions, and a longer-lasting spark plug. Perfect for lawn and garden applications, this spark plug contributes to smoother acceleration and enhanced engine efficiency.
David E.
Reviewed in the United States on March 12, 2024
fuel economy has improved, Engine power has impoved also. Fast delivery, good looking product.
les m.
Reviewed in the United States on December 11, 2024
No adjustment needed just install them and go.
Codybonham
Reviewed in the United States on March 8, 2023
Was a perfect fit to bring my 1993 4.9L f150 back to life again ! Would definitely recommend!
Scott D
Reviewed in the United States on April 30, 2023
I replace the plugs in my mower every spring. These are great.
Daniel Feist
Reviewed in the United States on October 26, 2019
I run these E3 brands on all my gas engines they work great. This plug went on a 91 ford f150 with a 300 6 cylinder. Seems to run smoother now
Juan
Reviewed in the United States on October 2, 2019
My 1992 Ford F-150 with a 4.9l was due by miles for tune up but otherwise running great. Decided to try these to see if could get a little more power or better gas mileage as they claimed. These have been in for over a month and trucks acceleration has gone DOWN from the start of installation and misses terrible at idle. I am extremely disappointed as they cost twice as much as OEM plugs and will now need replaced. Cap, rotor and plug wires all meter within OEM specs so it’s not them. I do not suggest these and am very unhappy.
Aristocrat Carpet installation
Reviewed in the United States on September 11, 2018
This is a great plug...expensive, but it is worth every dollar of it....goodbye motorcraft spark plugs !!!
D. L.
Reviewed in the United States on June 25, 2018
Been using these bad boys for a while. Work great in my 93 F150 with a 300 straight 6. Pricey but quality.
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