Better MPG?
#76
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My spark plugs were replaced along with my engine replacement...so that was about 35000 miles ago.
I'm not 100% sure but i don't think my coils were ever replaced. Im going to see how the gas mileage test goes then im going to go from there.
Im going to guess like yous all stated that its my plugs/coils.
I'm not 100% sure but i don't think my coils were ever replaced. Im going to see how the gas mileage test goes then im going to go from there.
Im going to guess like yous all stated that its my plugs/coils.
Last edited by PeteInLongBeach; 03-31-2010 at 02:30 AM.
#77
Go ahead and test at 65 and 60 mph and you'll see that I'm right.
#78
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how much am i looking at for coils and spark plugs?
how much together and for each individually...i have a uncle who can get me them for what his dealership pays and he said its still few hundred.
how much did yous pay to replace?
not talking labor im putting them in with my dad.
how much together and for each individually...i have a uncle who can get me them for what his dealership pays and he said its still few hundred.
how much did yous pay to replace?
not talking labor im putting them in with my dad.
#79
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how much am i looking at for coils and spark plugs?
how much together and for each individually...i have a uncle who can get me them for what his dealership pays and he said its still few hundred.
how much did yous pay to replace?
not talking labor im putting them in with my dad.
how much together and for each individually...i have a uncle who can get me them for what his dealership pays and he said its still few hundred.
how much did yous pay to replace?
not talking labor im putting them in with my dad.
#80
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The only worthwhile way to increase mpg I believe is efficient driving behavior coz the price of modding is very unlikely to offset the money you could have spend on gas unless you will be keeping the car for a long time. Here is an article on mpg I find helpful at least for me:
http://www.everytime.cummins.com/***...Whitepaper.pdf
http://www.everytime.cummins.com/***...Whitepaper.pdf
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#83
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Can anyone give me a site where i can buy new plugs wires and coils?
I cant search on my iphone...will take wayy to long.
I was told from my uncle, he works at an acura dealership. He said for plugs and coils alone is roughly 300$
I cant search on my iphone...will take wayy to long.
I was told from my uncle, he works at an acura dealership. He said for plugs and coils alone is roughly 300$
Last edited by MarcMiller; 04-06-2010 at 02:54 PM.
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#87
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no ****...but when my car only gets 11 mpg...thats not something im gonna leave alone...i obviously know the 8 doesnt get good gas milage...if you read the thread from the begining you would know that...my spark plugs, coils havent been changed in forever..
#91
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But theyre racing plugs? they arnt different at all?
would yous recommend just getting stock over the rb?
would taking cats off stock exhaust sound like crap?
could be a temporary thing until i get an exhaust.
would yous recommend just getting stock over the rb?
would taking cats off stock exhaust sound like crap?
could be a temporary thing until i get an exhaust.
#92
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"This spark plug is NOT recommended for street use" is what it says for the racing NGK ones from Racing Beat. They're way too cold, won't do well in a daily driver.
No amount of mods is going to do miracles to your mpg... it's just something you have to live with. Have you measured what mpg you're getting yet?
No amount of mods is going to do miracles to your mpg... it's just something you have to live with. Have you measured what mpg you're getting yet?
#93
Momentum Keeps Me Going
Originally Posted by MarcMiller
I only filled up completly twice...and i didnt really think about the gas i was still overwhelmed by the car.
#94
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Marc, not to be a pain, but I thought a week ago 3-30-10 you weren't sure about mileage...now it's 11mpg. Can you pls post up your last three fillup amts from your gas slips and the odometer mileage at each fillup? 11 mpg sound a tad low and I wonder how you suddenly are so sure...and I say that only because, well, take my word for it, it's happened a lot that people don't get their true mileage straight and get all worked up over the fact their RX-8 isn't an economy car. No one want to spend money fixing things that aren't broke, and I'm sure you don't either. So for any of us to give you the best advice, we need to know the real mpg backed up by your slips first.
i would post but i dont have how many miles i went on my gas tank...i think it was roughly 155-160...thats on a FULL tank.
now my most recent one which was 2-3 days ago i filled up and right now im alittle under a 1/4 tank and im at 190mpg...but i drove to and from the shore so all highway miles.
#95
Momentum Keeps Me Going
Here's the problem Marc. Trying to compute mileage based on full tanks and half tanks can't be done. Tanks and half tanks **are not** equal to a certain number of gallons. Gauges aren't accurate.
You need to go from a fixed mileage on your odometer. Write your mileage down, fill the tank to click off, drive until the next fill up, fill to click off, write down the mileage again. Repeat three times to get a reasonable average then divide the total miles driven (1st fill to last fill) by the total gas bought (total of three gas slips gallons) to get any mileage number that reflects reality and a sound mathematical calculation. And saying the city mileage sucks and the highway mileage is ok...well that's why you get the average...you need to, well, average these out.
BTW 190mpg isn't all that bad ... even on the highway
You need to go from a fixed mileage on your odometer. Write your mileage down, fill the tank to click off, drive until the next fill up, fill to click off, write down the mileage again. Repeat three times to get a reasonable average then divide the total miles driven (1st fill to last fill) by the total gas bought (total of three gas slips gallons) to get any mileage number that reflects reality and a sound mathematical calculation. And saying the city mileage sucks and the highway mileage is ok...well that's why you get the average...you need to, well, average these out.
BTW 190mpg isn't all that bad ... even on the highway
![Wink](https://www.rx8club.com/images/smilies/wink.gif)
#98
I'd actually suggest getting your 02 sensor and cat converter (leaning towards 02 sensor) checked/replaced first before anything, even if you don't have a cel, it might be a sign that either is failing or maybe has failed already...I'm in the same boat as you...getting 12city n 15 highway...compared to other rx8s that's pretty bad...n I'd say yours isn't normal either...I had a post about it but no1 cared to help so i'm jus researching it myself...its for my own good anyway.
I did everything people mentioned in your thread as far as improving mpg...from filter, cleaning maf, seafoam, even got bhr coils (wanted to upgrade 2 it regardless of the problem...its great!)...in the long run I increased 1-2mpg. So I kinda think its not something as simple as cleaning ur air filter and "whooop...there goes that 8-10mpg i'm missing"...but wut do i know?...i'm still learning so jus take my word as advice n not a definite thing...or not...up2 u
I'm gonna change my 02 sensor nxt week n let u know how it goes
I did everything people mentioned in your thread as far as improving mpg...from filter, cleaning maf, seafoam, even got bhr coils (wanted to upgrade 2 it regardless of the problem...its great!)...in the long run I increased 1-2mpg. So I kinda think its not something as simple as cleaning ur air filter and "whooop...there goes that 8-10mpg i'm missing"...but wut do i know?...i'm still learning so jus take my word as advice n not a definite thing...or not...up2 u
I'm gonna change my 02 sensor nxt week n let u know how it goes
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
#99
I'd actually suggest getting your 02 sensor and cat converter (leaning towards 02 sensor) checked/replaced first before anything, even if you don't have a cel, it might be a sign that either is failing or maybe has failed already...I'm in the same boat as you...getting 12city n 15 highway...compared to other rx8s that's pretty bad...n I'd say yours isn't normal either...I had a post about it but no1 cared to help so i'm jus researching it myself...its for my own good anyway.
I did everything people mentioned in your thread as far as improving mpg...from filter, cleaning maf, seafoam, even got bhr coils (wanted to upgrade 2 it regardless of the problem...its great!)...in the long run I increased 1-2mpg. So I kinda think its not something as simple as cleaning ur air filter and "whooop...there goes that 8-10mpg i'm missing"...but wut do i know?...i'm still learning so jus take my word as advice n not a definite thing...or not...up2 u
I'm gonna change my 02 sensor nxt week n let u know how it goes![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
I did everything people mentioned in your thread as far as improving mpg...from filter, cleaning maf, seafoam, even got bhr coils (wanted to upgrade 2 it regardless of the problem...its great!)...in the long run I increased 1-2mpg. So I kinda think its not something as simple as cleaning ur air filter and "whooop...there goes that 8-10mpg i'm missing"...but wut do i know?...i'm still learning so jus take my word as advice n not a definite thing...or not...up2 u
I'm gonna change my 02 sensor nxt week n let u know how it goes
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
#100
weeeeeeeeee
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The MPG thing gets a lot of attention. You google Rx8 you're going to find mention of it everywhere, so its more on people's minds than other cars. Someone said "OMG it gets horrible mileage" because they couldn't find anything negative to say and now that's the reputation we get to live with. Me, I'm tracking MPG to see how I can improve it through driving better, just like trying to improve track times, etc. So far I've found, by the way, that grannying it gets you worse MPG than being moderately aggressive.
I'm totally stealing your signature!