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dakotaman
Dodge Dakota
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11/10/2002
22:37:24
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 Subject: Which spark plugs
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Does anybody know of a sparkplug that can increase fuel economy? I know everyone is promoting the autolite 3923's, but do they increase mpg? What about splitfires or NGK v-power plugs, has anybody tried these. Are they better for fuel economy? I am looking at changing my plugs in the next couple of days and would like something that could increase mpg.
1998 3.9 v6 cc
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R/Truck
Dodge Dakota
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11/11/2002
15:40:12
|  RE: Which spark plugs
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Your not going to get an increase in mpg with a sparkplug change. I switched over to the NGKs and it did smooth out my idle.
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Perpetrate
Dodge Dakota
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11/11/2002
15:53:02
| RE: Which spark plugs
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I installed the NGKs and some wires at 70K miles. Slight power increase due to the old plugs being worn out at 60K. NGK plug number is 7252 and can not remember the wire number. This is the OEM replacment so no major MPG change. You might receive an increase if you go with an expensive plug like a splt-fire or the v-power plugs.
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Jacque
Dodge Dakota
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11/11/2002
16:05:21
| RE: Which spark plugs
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I have heard of people installing sparkplugs like Rapidfires, Bosch Platinum +4's, etc. that unshround the spark to produce a bigger flame combined with a hotter aftermarket coil getting better gas mileage. One guy with an RT said that on the same amount of gas took to go 65 miles, he could now go close to 100. Usually gives reliable info. Now that was with a heavy foot because that is the only way he knows how to drive. He had Platinum +4's and a Jacob coil. Instead of buying these expensive plugs, you can take any regular sparkplug and grind the ground electrode back so that the center electrode is exposed. You just carefully bend up the ground electrode so you can use a bench grinder to take off what is needed, bend back, and then set gap. It doesn't take much practice to know how much to grind off. Just be careful and don't take off too much at a time. I haven't installed a hotter coil yet so I can't say one way or the other. I have grinded back some 3922's for my truck. The real benefit is noticed when you go with the hotter coil supposedly.
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