New plugs, +4 mpg
05-14-04, 04:18 PM
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Displacement > Boost
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New plugs, +4 mpg
Wow, I just changed my spark plug with stock NGK heat range type (around five bucks apiece x 4), and my gas mileage went from 21 to 25 mpg mixed city / (mostly) highway. I don't go easy on this car and it has a street port, so I'm surprised that it has responded to fresh plugs like this. It even has heavy wheels and stock exhaust.
Piston cars will run fine on fouled plugs I guess. I've only owned this car for about 7k total miles, and it was on the plugs it had when I bought it. My Integra would never change much with new plugs.
The $22 spent on new plugs should pay for itself in exactly 1498 miles, based on the current price of gas ($2.159 around here).
Piston cars will run fine on fouled plugs I guess. I've only owned this car for about 7k total miles, and it was on the plugs it had when I bought it. My Integra would never change much with new plugs.
The $22 spent on new plugs should pay for itself in exactly 1498 miles, based on the current price of gas ($2.159 around here).
05-14-04, 04:27 PM
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Super Raterhater
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Yeah, it's amazing what plugs will do for you. Speaking of which, I really need to change the plugs in my Turbo monstrocity before i foul them to all hell and back.
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05-14-04, 07:07 PM
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Lava Surfer
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yeah i've noticed my milage is at its best only for the first 2-3 tanks after a spark plug change...thats only like 700 miles and then it starts going down 1-2 mpg every few tanks it seems.
05-14-04, 09:37 PM
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Boing
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I've noticed big improvements on all my rotories as well with new plugs. I need to swap them out on my 'Vert this weekend! I'll post some before/after mileage if I can remember. It should be fairly accurate because I drive the same 100+ mile route on a daily basis and always keep track of gas usage.
05-14-04, 10:23 PM
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Displacement > Boost
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The local price of gas just went up to $2.239/gal. It will probably keep climbing. A new O2 sensor is looking pretty cheap all of a sudden. 
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