E3 plugs

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had them in my jeep liberty, they did do a little better on the gas mileage but they fouled out on me in less than 3 months so I went back to the good only copper plugs.
 
save your money the cheap champions are just as good if not a little better .
 
X 1000 , If your engine is running properly no plug will give you 3-4 mpg , maybe if the engine had 3 dead plugs . Just had a look at my cheap champions and they were in great shape after 8,000 miles light tan .
 
jerry6 said:
X 1000 , If your engine is running properly no plug will give you 3-4 mpg , maybe if the engine had 3 dead plugs.
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And this is where they can get away with such ridiculous claims. I could pull 2 plug wires off and drive my truck around for a week then change the plugs and hook all the plug wires up and claim it got 3-4 mpg better

I will admit some plugs do some better than others due to their design but in my 35 yrs. of wrenching I have never seen a big gain from installing new plugs when the ones I took out were firing good.
 
Read those ads carefully. They usually say something like "tested first w/ factory plugs, then with our snake-oil plugs, and got better mileage with latter". I expect the engine was cold the first time, then warmed up. A scientist would repeat, reversing the order. MAD-men are scientists of a different bent.
 
I agree with all the above. The spark energy will only jump one gap, not 3 at once. tmm
 
We tried them in our race Dakota and it slowed down two tenths, but the old Champion plugs back in and regained the two tenths. Yes, they are snake oil salesmen.
 
three words to sum it up, inconsistent spark pattern. There is no spark control with these things, they scatter the spark pattern all over hell and beyond making it impossible for a flame kernel to burn the same everytime it fires. bosch platinum 4's, and 2's do the same. Working at NAPA, I flat out refuse to sell ANY of the three mentioned above. Ive had more come back than not. NGK V-power plugs have my vote. Ive never had any trouble with them. From derby cars, circle track cars, daily drivers, pickup trucks, hot rods, sand dragsters, to street cars, ive never had a single one come back because of a product failure.
 
This crap has been around as long as cars. When I was a kid, J.C. Whitney and Warshosky sold "lifetime fire injectors." This sort of fire water has been around forever

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If installing new plugs made any noticeable difference, you needed new plugs. You get ONE spark, and it jumps through the path of least resistance. A sharp edge (new plug) helps a spark to form. Yes, some fancy plugs have more sharp edges, and so it may seem that they would stay efficient longer. This assumes that all those sharp edges don't erode at the same rate due to combustion chamber heat. A mild steel electrode plug lasts about 10,000 miles regardless of brand.
 
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