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Mazda RX-8 Gas Mileage Reports

91 messages, Last post on Feb 13, 2009 at 9:37 AM
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Replying to: trispec (Sep 25, 2006 5:31 am) You must be short and have short passengers too. I love my 8 (except for the mileage, recalls, and lack of resale value) but my 6'+ sons really have trouble fitting in the car with me - and pretty much no one can ride behind me (and I am not that tall). But driving solo it is fine - and close to the thrill of the S2000. With a VooDoo knob the 6 speed in the 8 actually has shorter throws than the S gearbox - which has a very tight pattern. Lots of cars can do close to a g in a corner, and have more power to pull out of it. My M5 could, for sure Enough of that, since this is the MPG forum - I will just state again 14-15mpg around town and 21.45 on a 95% interstate commute is lousy gas mileage for a small car. Good thing premium here is down under $2.50 a gallon Dennis
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Replying to: dwynne (Sep 25, 2006 7:28 am) Mazda was aiming at a price point, that's why the auto tranny can't go over 7500. An auto-tranny that can handle 9000 RPM starts to get expensive. The Caparo T1, needs a $13,000 paddled shifted 6 speed auto tranny to handle it's 12000 RPM racing V8. Sticks are definitely going the way of the dodo bird, I think. Beside Boston traffic jams pretty much destroyed my shifting knee and angle after 15 years of sticking it. |
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Simple really. Changed my commute route to maximize my ability to coast in full automatic mode. Gone from 14MPH to near 18MPH in the city. I had long taken Pathstar's advise about keeping RPMs above the 3000 level via manual mode paddle shifting, because of wanting to guard against carbon build-up. But then I realized that coasting 50% or more of my commute would keep carbon down even better. There just so happens to be a certain odd combination of routes where, although traffic is heavy, coasting is also almost continuous through out. So rather than trying to have fun on less crowded hills and curves where coasting is just not practical, I'm commuting the slow and steady route with a massive traffic flow. |
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I took my 2005 AT in last month for the voluntary recall, and among other things they "upgraded" my PCM. Since then I've noticed about a 1 MPG decline in fuel efficiency. My MPG average for the month before the upgrade was 18.6. Since then it has been 17.6, with no change in driving patterns. Some upgrade!
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Replying to: rx8wannab (Dec 14, 2006 11:14 am) If you think "upgrades" should address fuel efficiency, time to buy a Prius.
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Replying to: pathstar1 (Dec 14, 2006 12:22 pm) Seriously, the cause and effect is quite clear in my case. The lower MPG started immediately with the next tank after the upgrade, and the highest MPG since then hasn't matched the lowest MPG for the month before that. I didn't expect an upgrade to "address" MPG. I knew what I was buying, and it is worth it. I just didn't expect it to degrade MPG.
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Replying to: rx8wannab (Dec 18, 2006 9:52 am) OTOH, my 2005 RX-8 AT seems to be getting slightly better MPG since the lastest PCM flash. Just got back from my annual 2000 mile trip from Boston to the mountains of NC. On one stretch I got 25.2 MPG with lots of 70-90MPH non-cruise driving on new years day.
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Replying to: trispec (Jan 02, 2007 2:43 pm)
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Replying to: rx8wannab (Jan 17, 2007 2:26 pm) |
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Replying to: mba2dna (Aug 05, 2005 8:16 pm) |
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