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Coupes & Convertibles Mazda RX-8 Mazda RX-8 Gas Mileage Reports
91 messages, Last post on Feb 13, 2009 at 9:37 AM
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Replying to: dwynne (Nov 18, 2005 10:19 pm) After 3500 miles with my RX-8 AT using full auto, no paddle shifting, no fast take offs, and staying under the speed limit, I pulled 17mpg. Full auto constantly shifts to the minimum speeds for 2nd, 3rd and 4th and drops rpm to 1500 or less for maximizing coasting. You end up riding the brake a lot more since there is little engine breaking available in 2nd, 3rd and 4th at low rpm levels. But driving like that all the time would be a horrible waste of the RX-8 resources and probably would cause carbon build up in the engine systems along with extra brake wear. Driving with paddle shifting between 2500 and 4000 rpm strictly, I get 15mpg. This is the best balance of enjoying the RX-8 resources and traffic reality during the day. Driving with paddle shifting between 4000 and 6000 rpm strictly I get 11 mpg.  This is hard to do on a practical level in the city. Late nights is the only possible time and even then traffic can get in the way.
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Replying to: trispec (Nov 19, 2005 5:31 am) I'm very happy with that. |
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2004, MT with 14,200 M on the clock. Took weekend trip to Palm Springs from LA. One passenger, trunk full but back seats empty. Outbound: 168.2 miles at average speed of 29.5 MPH (2 hours plus in stop/go 1st gear traffic due to overturned truck on 10 FWY  ) 17.84 MPG Return: 136.7 miles at average speed of 63.5 MPH (steady 75 -83 mph on 60 FWY  ) 20.12 MPH
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| 20.12 MPG | |
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I've been keeping track of gas mileage since day one, which is over 2 yrs ago. miles: 26275.7 gallons: 1398.596 miles/gallon: 18.79 price: $2847.39 price/gallon: $2.036 miles/dollar: 9.23 miles/day: 30.62 octane: mostly 89 The normal mpg range is 17-22. The 3 exceptions were when I took the car to Sebring Racetrack where it average 8-9 mpg. Fun, fun, fun! |
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Replying to: dwynne (Nov 18, 2005 10:19 pm) Well, the next tank is back down to 14.5 mpg for the same commute, so getting over 16 mpg was just a temporary thing  Dennis |
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2004 RX-8 33500 miles bought new Nov 2005 for a real good price. Worst mileage 14.8 Georgia mountain autocross Best 22.8 hwy - 74 mph (wife driving) Daily driving 16-17 45 mile round trip commute. Drive easy 17.7 maybe, Drive hard 16.0 - I pick drive hard... BTW first set of tires lasted 30K now have Dunlops - much quieter, better ride, slightly better mileage. |
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Would I be harming the RX8 engine if I used regular 87 octane gas? Also would that effect my gas mileage negatively?
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Replying to: stbarton (May 01, 2006 9:24 am) |
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I could never justify buying such a small car, that isn't as fast as the competition that gets such lousy gas mileage. The 350Z gets about 25 MPG. Even the Mustang GT gets better mileage and it is a V8! I owned a 1973 Mazda RX2. Fast little bugger, but it had oil burning problems. I wish they could work out the kinks in the Rotary engine. Seems like they haven't yet.
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