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Sedans Honda Accord Honda Accord Real World MPG
2666 messages, Last post on Nov 08, 2009 at 12:49 PM
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Replying to: dudleyr (Mar 23, 2009 11:31 am) i think 40 psi is overkilled...The rolling resistance may be decreased, but you get less traction and extra center wear on the tire. 07 Accord V6 auto average about 18mpg with 90% city/10%highway this winter (5W-20 Synthetic, X-ice winter tires 215/60R16  32PSI all around).
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Replying to: dudleyr (Mar 23, 2009 11:31 am) ....Congrats on 40 EZ - twice at that. I recently did a graph (exponential regression) of my 10 tanks averages and they show an increase in mpg over the two years I have owned the vehicle, so it was just a matter of time for you. In my experience mpg improves with age for the life of the vehicle, assuming the engine maintains compression. Gains taper off as the car gets older though. ........appreciate your words/insightful base 10 forecasts..... The first 40+ tank was so high - - - I just had to try and re-validate. Anyway one looks at it, these cars put to rest the concept that performance AND economy are mutually exclusive. I feel some what the traitor when I consider replacing the space soon to be vacated by my small sloop/trailer - - - - with a Miata. I reckon what I'm really saying is that my 6M perception sets the bar big time high. hang in there, senor............ best, ez.... |
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Regarding 40 psi. Heat is a major contributor to tire wear, and heat is caused by the tire flexing as it rolls. More pressure means less flex and less heat. More pressure sometimes means that the sides wear more slowly than the center, but the center can still wear longer than lower pressure tires. In my personal experience with the Accord - my tires wear evenly and I still have my original tires (about 30k on the bridgestone summers and a little less on the michelin x-ice winters) All 8 of my tires are at half wear or less so I expect to get about 120,000 miles total or about 60,000 miles per set. As far as traction goes, greater pressure results in a stiffer sidewall, so the tire acts like it is a lower profile and does not roll over in turns and maintains its contact patch. One easy way to tell if a tire is underinflated is all the squeeling in turns because of the tire rolling on its side slightly. Personal experience - the car handles more crisply with 40 psi and squeels less around turns. The body roll gets annoying way before tire grip is a problem. The only real drawback to higher pressure (at least in the range I use) is a harsher ride, but the ride is still way smoother than my Integra so it is not a problem to me. If you have never tried 40 psi give it a whirl - you can always go back if you don't like it, and it does help with mpg. Also remember to only check tire pressure when the tires are cold. Best way is to pump em up a little high and then drop the pressure to what you want the next morning after the car has sat all night. btw - love the x-ice tires I have no problems with blizzards in the Dakotas and they are wearing extremely well - better than my summer tires. I have used blizzaks and yokohamas and the previous michelin (arctic alpin) and these are the best of the lot.
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| Has any body tried that new Castol synthetic 5W- 20W in there car yet. | |
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Replying to: dudleyr (Mar 24, 2009 6:34 am) Maybe you should aware that over-inflated tires make your car harder to stop. It's caused by less contact area and the front tires bounce. |
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Replying to: packer3 (Mar 24, 2009 2:13 pm)
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Replying to: dudleyr (Mar 24, 2009 6:34 am) Interesting that yours came with Bridestones. Mine did as well. I know we've discussed that on Edmunds before but I can't remember if there was any particular reason. We both have manuals though... and great mileage. Hmmmm  It also sounds like those who have Michelins aren't too happy with them. Mine are at 65k and doing fine. |
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Car: 2004 Accord EX V6 sedan Load: 2 people plus some light luggage Tires: Yokohama W4S, 32/34 psi Mileage: 78k During Valentines Day weekend my GF and I went to a little B&B just south of Morro Bay, CA. The round trip was 430 miles (95% highway, 5% city) on one tank of regular Costco gas (14.932 gallons). We took I-101 to route 1 all the way down which was relatively slow and scenic. There were some sections where the road was clear and we could get some speed. Route 1 overlooks the Pacific coast so it has a lot of twists and elevation changes and we weren't going that fast (<50 mph max). Coming back we crossovered to I-101 via 41-E and then took 46-E to I-5 north where traffic was moving briskly (as usual). There was a lot of traffic (Sunday evening) so there was a lot of passing and darting in and around traffic. I'd say the average speed on the return was around 75 mph. The entire trip, though mostly the return, had a lot of heavy sustained acceleration (love the V6 power for passing!) and braking. We put 430 miles on the odometer and averaged an astounding 28.8 MPG!
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Replying to: mark4490 (Mar 29, 2009 8:35 pm) My last several tanks, post november, when winter hit have been sub 26. Hoping once the winter blend is out of the picture again my mileage will improve. |
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Replying to: catmike (Mar 26, 2009 11:00 am) Use the Recommended Grade of Motor Oil You can improve your gas mileage by 1-2 percent by using the manufacturer's recommended grade of motor oil. For example, using 10W-30 motor oil in an engine designed to use 5W-30 can lower your gas mileage by 1-2 percent. Using 5W-30 in an engine designed for 5W-20 can lower your gas mileage by 1-1.5 percent. Also, look for motor oil that says "Energy Conserving" on the API performance symbol to be sure it contains friction-reducing additives. Fuel Economy Benefit: 1-2% Equivalent Gasoline Savings: $0.02-$0.04/gallon No mention of synthetic vs conventional.
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