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i tried some last night and it ran worse. the ones i took out were NGK's but it was too late, i wanted to try the bosch's. put them in and went down the road and it was sluggish. Usually its quite peppy but not this time. went back to the shop and took em out, put the NGK's back in. don't waste your money on them.

 
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I have never had a Honda that ran good on Bosch plugs. They seem to run best on NGK plugs. So I'd have to agree.

 
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agreed

 
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Bosch plugs...
the performance was good for the first day or two and then declined from there...the MPG also went down

Denso plugs...
the performance is good and havent changed since i installed them...currently, i am getting 30-31 MPG

 
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spark plugs improves MPG??? wtf, i never knew that lol.

 
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since i've had my car i have gotten 32,34,33 mpg's on three tanks of gas, all with ngk's.

 
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might b a stupid question but where is a good place to get ngk plugs and wat type?

 
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sparkplugs.com

 
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any ideas which one i should get?

 
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NGK are the best seriously...

 
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i just get copper v-power and change once a year. for $8 cant go wrong since its easy to change.

 
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hrmmm not sure where u are lookin to get $8 for copper v-power but i checked advance and their v-power plugs are about 1 buck a piece unless there is another v-power.

 
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or go iridiums and dont change for 100k+ its cheaper and willl give a smoother idle. but we have all had the discussion before huh gear?? LOL

 
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ill prob go tommorrow and grab me some ngk v-power plugs for $2 a piece which is freaking cheap. the other ones for sale there are the IX Iridiums and some wierd Laser Platinum version of NGKs which costs more than the v-powered ones.

 
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the only reason someone invented plat/irid plugs is for cars where it takes 4 hrs to change plugs. they do not last 100k and still run like new. neither does copper, but we can afford to change them. i've had mine in almost a year and they still run like new. i have another set waiting to install but really they dont even need changing yet.

 
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NGK all the way. Garunteed the best for all imports not just honda's. Go bosch if you have a domestic

 
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are you still running the copper plugs. if so yu should try to change if its been a year. i can almost gaurantee you will feel a difference

 
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car just runs so good i never noticed performance loss since last december. i'll plan on changing them anyway before winter.

 
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I bought Bosch plugs for my Honda, but I'll be getting some Denso plugs here before long. I can already feel the loss in MPG and what little horsepower it already had

 
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So now spark plugs go bad over a year regardless of how many miles are on them?

 
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lol. so what is a good estimate (safe side) to change coppers on a stock engine? i've heard anywhere between 10-30k?

 
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that is about right
coppers wear out a lot quicker because of the softer material.

what a contribution!! LOL think about it man gear hasnt let his vic sit all year. he drives it daily. so it has enough miles to change a set of copper plugs. realistically if you do have copper plug you should change them about once a year if the car is driven at all. copper when exposed to elements will corode. even if your not driving the vehicle as much then there is still a good chance they need to be replaced...

 
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i prolly have at least 10k on the plugs now... and its not a big deal to get new ones.

 
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I wish I only drove 10K miles a year...I got my car with 79 thousand miles December of 2005 and I'm sitting at 91K miles already

 
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copper plugs are crappy and cheap/low cost. this is why honda puts them in their d17s.

same reason why honda put firestones on the earlier em2s.

 
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actually the oem plug for d17 is double platinum. and out of all the plugs i tried, the copper seems to give the best mileage and performance IMO so long as they are changed often. my stock plugs and iridiums ran like crap. omg dont remind me of the firestones. im just glad they only lasted 20k and i could get better ones

 
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I got worse results w/ coppers than I did w/ iridiums.

to each their own.

firestones are trash. mine were completely bald [WITH proper rotations] by 20k miles. Treadwear rating 400 my ***.

my current michelin pilot sport 2's have gone ~25k miles with NO rotation and still have life [I was trying to wear that out fast to get different ones] ... those have a 220 wear rating ... of course there is more strain now as well since I'm not using a d17 ...


/end ramble

 
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i got the best results with iridiums as well. me and gear had a pretty long thread about this like last year. all cars respond differently to differents things.


D you should try out some falken azenis 615's i have them on my dc2 and they have pretty good traction. i havent driven them much in the rain yet though. but of course i would rather have sticky dry tires where we live..LOL

 
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I'm not really a fan of the azenis ... the older 215's in 225/45/17 were 26 pounds each, according to some sites ...

my current michelins 225/45/17 are 23 pounds, according to tirerack ...

I want to try to avoid heavy tires if possible ...

I'm pondering whether or not to get the 235/40/17's, even though tirerack only recommends a rim size of 8.0"+ ... and mine is 7.5" ... but it's wider and 22 pounds vs. my 23 pounds ... I dunno.

I used to have 215/40/17 goodyear eagle f1 gsd3's ... those were 19 pounds according to tire rack .. but they didn't do well in the straight-line department ... and the ride was very rough [ie. I was afraid of bending my rims whenever I went over hugely uneven pavement/potholes]

 
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I've been rockin bosch platinum +4's for 35,000 to 40,000 miles and still have great gas mileage. I should pull them out and give them a look though.