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Sedans Honda Civic Honda Civic Tires and Wheels
238 messages, Last post on Oct 29, 2009 at 6:41 AM
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We purchased a 2006 Civic EX new and recently replaced the tires at 55,000 miles. Our mileage on the highway has ALWAYS been 44-48MPG - we set the cruise at 5 mph below the limit and rarely have to change speeds -driving in Alabama, Mississippi, Arkansas, Georgia, North Carolina (flatlands) & Florida. I put Yokohama AVID TRZ as replacements and consistently get highway mileage of 36-40 mpg driving in all the same places. I even added about 10% air pressure (32 to 35psi) with no recognizable benefit. Have others had these problems? What were your actions? Thanks, Ernest1934
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Replying to: ernest1934 (Jan 03, 2008 1:07 pm)  70-71 mph where the limit is 65 and never exceed it (OK never say never..rarely then) but you realize those claims are squarely within hybrid territory and unless the speed limit you are 5 mph under is 55 mph the I have trouble believing your claim (from very first hand experience). That said, tires should not cause any appreciable fuel economy loss. Notice I said appreciable especially if they are direct replacements in size. Certainly not what you claim. In fact the "after" fuel economy sounds a whole lot more like what we get on the highway (the middle 30's), You may just now be calculating the "normal" fuel economy for this car after somehow inflating it for 55K miles. Don't ask me how that is even possible but that is what it seems like to me.
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Replying to: targettuning (Jan 04, 2008 5:40 am) Rather than to simply dispute someone's credibility, you might consider a little time to study the rolling resistance on various tires and, additionally, the effects on gas mileage by varying your speed on the highway every time you slow down or accelerate the car to pass another. The math is fairly simple. You can make more friends that way. I asked a question if others with Civics had experienced any similar results to mine. I can apparently assume that you have not.
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Replying to: ernest1934 (Jan 04, 2008 6:59 am)
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Replying to: targettuning (Jan 04, 2008 7:52 am)
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Replying to: kiawah (Jan 05, 2008 2:50 pm)
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Replying to: targettuning (Jan 07, 2008 4:36 am) |
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Replying to: ernest1934 (Jan 03, 2008 1:07 pm) I have been trying to obtain the numerical rolling resistance for the original and replacement tires without success. However, I just talked to the Honda repair shop and they stated that they have had problems with the 06 Civic Hybrids that came with the same original tires as our non-hybrid EX when the original tires were replaced. The replacement tires have reduced the mileage 4-6 mpg. The reason, as I understood him, had something to do with the construction of the Bridgestone Turanza EL-400 and that the other tires could not compare. I certainly believe him, especially as that came from a Honda man. Since I believe I have verified that the loss of mpg as stated is due to the replacement tires, I will not respond further. |
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This is the highest mileage I've gotten on the highway with the oem Goodyear RS-A tires so I'm highly doubtful when I hear mileage figures in the mid 40's for non hybrid Civics. I guess it could be acheivable on flat terrain going 65 mph with the cruise on and no a/c but I would suspect 39 would be a more reasonable mpg amount. But anything is possible I suspect...I'm just very skeptical. The Sandman 
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Replying to: ernest1934 (Jan 03, 2008 1:07 pm) I even added about 10% air pressure (32 to 35psi) with no recognizable benefit. Have others had these problems? What were your actions? You will probably get a better response if you post your question in the Honda Civic Real World MPG forum. That's where the gas mileage experts hang out. Also if you review the forum called: Honda Civic Hybrid MPG-Real World Numbers You will see that the tires that comes standard with the Hybrid can have a big effect on gas mileage. When the standard tires were changed to other tires of the same size, the gas mileage would decrease significantly. So claims made by others in response to your post, that tires can not affect the gas mileage that much, are not true. |
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