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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Sep 2004 Posts: 241 'Bolter | | 'Bolter Joined: Sep 2004 Posts: 241 | Has anyone used E-3 spark plugs in a 235 six? Is there any truth to the advertising of increased fuel economy and horsepower? I'm skeptical. | | | | | Joined: Feb 2004 Posts: 29,748 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,748 | Gimmick spark plugs have been around as long as I can remember, and I've been tinkering with engines for nearly 60 years. They're equal parts of wishful thinking and outright lies. Like P.T. Barnum was fond of saying, "There's a sucker born every minute!" Keep the engine well-tuned and the spark plugs clean and gapped right, and any plug will give good gas mileage.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Sep 2004 Posts: 241 'Bolter | | 'Bolter Joined: Sep 2004 Posts: 241 | I agree with you. I'm not convinced. But you read some of the reviews and people swear by them. It's all perception. | | | | | Joined: Aug 2011 Posts: 45 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2011 Posts: 45 | Ditto on Hot Rod Lincolns reply. Ive been a auto tech for 40 years and customers have had me install all of the "gimmick plugs" and no one got back to me about how much better they run and how much better the fuel economy is. I proved it to myself with my 2000 Toyota Tundra, on two 800 mi. identical round trips to Portland. One with orginal plugs and one with the E-3 plugs as mentioned above. Less than .1 mile per gallon difference, always driven at the legal limit and with the cruise on. The only advantage is that you will not have to change plugs very often.
The older I get, I only want to work on older rigs.
| | | | | Joined: Apr 2005 Posts: 1,971 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 1,971 | Most people who buy gimmicks feel that it works because they spent more for it.
| | | | | Joined: Nov 2006 Posts: 247 'Bolter | | 'Bolter Joined: Nov 2006 Posts: 247 | If it sounds to good to be true, It probably isn't true.
Jim | | | | | Joined: Jun 2006 Posts: 693 'Bolter | | 'Bolter Joined: Jun 2006 Posts: 693 | i always figured that if any of this stuff actually worked it would be OEM. CAFE standards are tough and mileage bragging rights are always on the minds of the marketing people. if a simple spark plug change could really make a positive difference in MPG, you can bet they would be in new cars. even at $10 more per plug that's only $40-$60 on most cars and thats a drop in the bucket on a $20K-$30K ride...
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