RESULTS: Statistical Analysis of MPG -- Long
#151
hmm..I've been getting about 250 miles with 13.5gal of gas.
that's about 18.5-19miles per gallon.
It would be nice to get about 22-24miles per gallon like my evo did
but I am not complaining.
BTW, I have a pretty heavy right foot so I am not granny driving my car.
I just bought the car about 2 weeks ago with 10k miles on it.
It's a 6spd GT.
I just went to mazda to have some TSB's and was told that it had a new motor
put in @ 6500 mark.
Im really hoping I don't have any future probs with this car.
that's about 18.5-19miles per gallon.
It would be nice to get about 22-24miles per gallon like my evo did
but I am not complaining.
BTW, I have a pretty heavy right foot so I am not granny driving my car.
I just bought the car about 2 weeks ago with 10k miles on it.
It's a 6spd GT.
I just went to mazda to have some TSB's and was told that it had a new motor
put in @ 6500 mark.
Im really hoping I don't have any future probs with this car.
#152
hmm..I've been getting about 250 miles with 13.5gal of gas.
that's about 18.5-19miles per gallon.
It would be nice to get about 22-24miles per gallon like my evo did
but I am not complaining.
BTW, I have a pretty heavy right foot so I am not granny driving my car.
I just bought the car about 2 weeks ago with 10k miles on it.
It's a 6spd GT.
I just went to mazda to have some TSB's and was told that it had a new motor
put in @ 6500 mark.
Im really hoping I don't have any future probs with this car.
that's about 18.5-19miles per gallon.
It would be nice to get about 22-24miles per gallon like my evo did
but I am not complaining.
BTW, I have a pretty heavy right foot so I am not granny driving my car.
I just bought the car about 2 weeks ago with 10k miles on it.
It's a 6spd GT.
I just went to mazda to have some TSB's and was told that it had a new motor
put in @ 6500 mark.
Im really hoping I don't have any future probs with this car.
#154
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Join Date: Aug 2006
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At first, I reported to this thread (last year) I was getting 18mpg @ 70% hwy (aggressive)
Now, after 15k miles, I am getting around 20mpg @20% hwy miles (moved) (aggressive).
Now, after 15k miles, I am getting around 20mpg @20% hwy miles (moved) (aggressive).
#156
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Alright, so after a highway trip, here is what I was getting:
70mph avg (hilly 4k-7k elevation) 24.5 mpg (full tank) 90% highway
90mph avg (same as above) 23 mpg (3/4 tank) 100% higway
70mph avg (hilly 4k-7k elevation) 24.5 mpg (full tank) 90% highway
90mph avg (same as above) 23 mpg (3/4 tank) 100% higway
#157
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Join Date: Aug 2007
Location: Western Mass.
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Kind of surprised everyone complains about gas mileage on these cars. I drive mostly back roads with some city and in the last two weeks have gotten between 21.5 to 24.5 mpg. Just driving normally.
#158
Less Weight = Better RX8
I wish I had your milage
I have owned the car about 2 1/2 months. I average between 13.8 to 14.3 MPG. I do 95% off HWY driving but the higher numbers did have 30% HWY miles. I do have a big right foot, but I am having trouble beliving the RX8 getting WORSE MPG than my 318HP/380lb.ft. 4000lb Audi A6. I drive both the same way. I get 16-17 in city and 24 on the HWY in the Audi. Granted the RX8 is much more fun to drive but the A6 is much faster. Does anyone else get this bad of milage?
Last edited by psonoda; 10-24-2007 at 08:11 AM.
#159
there is a recall on the plugs and some other things you shoudl get done. then you MPG should go up. mine did.
went from 18-19 to 23-25 best ever was 27.
new plugs and recalled cat was my problem.
HR.
went from 18-19 to 23-25 best ever was 27.
new plugs and recalled cat was my problem.
HR.
#160
Registered
iTrader: (7)
My average 234.7 miles/9.093gallons, 87 reg unleaded
Filled up went to local grocery store, 3 miles
Drove 234.7 miles. Mostly doing 57-59mph. North 45 to Madisonville.
Slowest 49mp, fastest 64
One bumper to bumper stretch- burning van on freeway.
Hit 81mph but only briefly.
So what's my average mpg? 25.81mpg?
9.093 gal reg unleaded @$2.529/ga = 23 bucks !l
Oh yea, everyone passed me, including a one legged duck!
Dealer replaced 2 leading plugs / emissions recall 4206F yesterday
Drove 234.7 miles. Mostly doing 57-59mph. North 45 to Madisonville.
Slowest 49mp, fastest 64
One bumper to bumper stretch- burning van on freeway.
Hit 81mph but only briefly.
So what's my average mpg? 25.81mpg?
9.093 gal reg unleaded @$2.529/ga = 23 bucks !l
Oh yea, everyone passed me, including a one legged duck!
Dealer replaced 2 leading plugs / emissions recall 4206F yesterday
Last edited by Myardor; 10-24-2007 at 12:49 PM.
#161
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dAMN the most i can get out of a full tank of 91 is like 250 miles and thats with the low fuel light on for quite a while. my car has 54k on it and its a manual i might change the spark plugs this weekend which i think should help out a little
#162
Less Weight = Better RX8
Thanks for the info
Coils
Plugs
Cat
All the othe PCM updates have been done. I really don't think my MPG should never get above 14.3.
Is their anything else I should have them check?
Thanks everyone
#164
Less Weight = Better RX8
What bad english. I meant to say my MPG has never been above 14.3. It typically ranges between 13.8 to 14.3. Very Bad!
I took it to the dealer yesterday. They told me the MPG might improve if I changed the plugs. A dealer cost of $240. Ouch.
Interesingly enough the problem I reported to Jake Sweeney Mazda about the cluch engaging funny came back with "No problem found" However, Kings Mazda was able to find and replace two broken motor mounts. The car is feeling much better as a result.
I bought plugs from Napa for just under $100 for the set. (Dealer wants $160) Plan to replace them this weekend. Will let everyone know if there is a milage change.
I took it to the dealer yesterday. They told me the MPG might improve if I changed the plugs. A dealer cost of $240. Ouch.
Interesingly enough the problem I reported to Jake Sweeney Mazda about the cluch engaging funny came back with "No problem found" However, Kings Mazda was able to find and replace two broken motor mounts. The car is feeling much better as a result.
I bought plugs from Napa for just under $100 for the set. (Dealer wants $160) Plan to replace them this weekend. Will let everyone know if there is a milage change.
#166
RX-8 with no Mazda Dealer
Join Date: Sep 2007
Location: Dhaka, Bangladesh
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I drive my 05, RX-8(SE3P Auto 4 Speed) in Dhaka, Bangladesh, where temperature is around 35 degree celcius and in city driving I get around 4 kilometer per litre with 92 Octane.
Can someone tell me why do I get a horrible fuel consumption?
Thanks.
Can someone tell me why do I get a horrible fuel consumption?
Thanks.
#167
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I was getting a consistant 13-14mpg on my original engine. Seems to be close to the same with my reman one so far, but I figure I ought to wait for it to be broken in before I worry.
I do 70 city / 30 highway and drive moderately.
I do 70 city / 30 highway and drive moderately.
#168
Re:
New 07 RX-8 MT here, the past 3 months I average 18mpg if I drive very very conservately, 16mpg if I romp throughout full throttle 7000-9000rpm during the trips.
#169
Less Weight = Better RX8
I am glad I changed my plugs!
I just finished chaning my spark plugs. I thought is was going to be a real pain until I realized there was easy access through the driver's wheel well.
By jacking up the car and removing the front wheel, I had almost a straight shot to the plugs.
As you can see the plugs were somewhat dirty. If you change your spark plugs, I recommend you have lots of extensions. It made the job much easier.
Another thing I found was the the forward leading spark plug boot was loose while the rear trailing plug boot was nearly off. I had to pinch the boots to get good contact between the boots and the spark plugs. I will let you know about the milage with the next tank. Going to fill the gas up and test her out.
By jacking up the car and removing the front wheel, I had almost a straight shot to the plugs.
As you can see the plugs were somewhat dirty. If you change your spark plugs, I recommend you have lots of extensions. It made the job much easier.
Another thing I found was the the forward leading spark plug boot was loose while the rear trailing plug boot was nearly off. I had to pinch the boots to get good contact between the boots and the spark plugs. I will let you know about the milage with the next tank. Going to fill the gas up and test her out.
#171
Less Weight = Better RX8
Slight Improvement
My first tank after the spark plug change has improved my milage slightly. This tank I got 15.1 MPG. A small but welcome improvement.
I was wondering if anyone who has added an upgraded air box or air filter has noticed a MPG improvement? I was thinking about changing to a K&N filter while modding the factory airbox (Removing the internal baffles) and reducting the air out the front of the bumper for less restricted cooler air.
Any thoughts?
I was wondering if anyone who has added an upgraded air box or air filter has noticed a MPG improvement? I was thinking about changing to a K&N filter while modding the factory airbox (Removing the internal baffles) and reducting the air out the front of the bumper for less restricted cooler air.
Any thoughts?
#173
damn... 10 mpg sucks.
have you checked your cat? the way you check them is drive the car till it's fully warmed up. then let it idle and jack it up. take a temp gun and check the temp on the front and the rear of the cat. the guns are rather cheep kinda like and infer red temp gauge. when checking have some one rev the engine a few times to get a good amount of exhaust flow. if the temp on the front is higher then the back of the cat then it's plugged. and needs to be replaced.
the back of the cat should be a lot hotter then the front. that means its doing it's job.
HR
have you checked your cat? the way you check them is drive the car till it's fully warmed up. then let it idle and jack it up. take a temp gun and check the temp on the front and the rear of the cat. the guns are rather cheep kinda like and infer red temp gauge. when checking have some one rev the engine a few times to get a good amount of exhaust flow. if the temp on the front is higher then the back of the cat then it's plugged. and needs to be replaced.
the back of the cat should be a lot hotter then the front. that means its doing it's job.
HR
#175
RX-8 with no Mazda Dealer
Join Date: Sep 2007
Location: Dhaka, Bangladesh
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damn... 10 mpg sucks.
have you checked your cat? the way you check them is drive the car till it's fully warmed up. then let it idle and jack it up. take a temp gun and check the temp on the front and the rear of the cat. the guns are rather cheep kinda like and infer red temp gauge. when checking have some one rev the engine a few times to get a good amount of exhaust flow. if the temp on the front is higher then the back of the cat then it's plugged. and needs to be replaced.
the back of the cat should be a lot hotter then the front. that means its doing it's job.
HR
have you checked your cat? the way you check them is drive the car till it's fully warmed up. then let it idle and jack it up. take a temp gun and check the temp on the front and the rear of the cat. the guns are rather cheep kinda like and infer red temp gauge. when checking have some one rev the engine a few times to get a good amount of exhaust flow. if the temp on the front is higher then the back of the cat then it's plugged. and needs to be replaced.
the back of the cat should be a lot hotter then the front. that means its doing it's job.
HR