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2008 GX tire change to low resistence - my exp

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  • 2008 GX tire change to low resistence - my exp

    This is a reprint from my rant in another thread titled GX Gas Mileage. I am repeating it here so its easier to find for those wanting to get some fresh experience on converting to so called low resistence tires (LLR I think is the term).

    I welcome your thoughts too.

    I went to the Santa Ana Honda dealership for a set of low resistence tires, with the intent of increasing my mileage per gallon and lowering of the road noise in cabin.

    That was a few thousand miles ago.

    My car, a 2008 GX, now has about 34K on the clock, after 17 months of ownership.

    I did the dealer thing to assure I got the tires that are used on the Hybrid. I have a Hybrid Civic too so I am used to these in the other car.

    What I got were Dunlops, the same brand that I had before, and with assurance these are one of the two options for these so called low resistant tires, they put as replacement rubber on Hybrids.

    I run them with the same psi as I did in the OEM tires, 32.

    WIth the new tires, I took a road trip from OC to the SF Bay Area, a round trip (via HWY 101) that is about 1,000 miles, all in. No evidence of improved mileage over other trips (ie same range per full charge), and only marginally lower cabin noise (probably normal for new vs well used tires). No discernable improvement over what a regular tire may offer.

    The $700 I spent for these tires, including alignment, balancing, whatnot, have done nothing to improve my mileage or in lowering road noise so I can talk handsfree on my Bluetooth enabled Motorola/Kenwood integrated phone. What a waste. Probably wasted $200.

    For those who may wonder how I drive, between the gas pedal and my right foot, I consider there to be an egg.

    I even shut off my car at the light if its going to take much longer than 10 seconds of wait.

    In addition, the tires have poor stopping power, as I experienced a few recent fast stops and those tires were not up to task. A set of modestly priced Yokohamas would blow these away.

    Not bragging, but I have been in various high performance driving schools in different high performance cars, from BMW to Porsche, most often with PS2s as the rubber of choice. Bridgestone, Yokohamas were other choices. The PS2s were the best in my opinion. So when I share my experiences, I do feel qualified.

    Summary: I do not recommend wasting your money with these low resistence tires,no improvement in mileage and definately not in cabin noise, when compared to a normal low cost everyday tire. Save your money!
    Last edited by dmccrary90025; 05-21-2009, 01:17 PM.

  • #2
    Re: 2008 GX tire change to low resistence - my exp

    Thanks for the report. I breifly wondered about them when I was due for tires. But, ended up going with 80,000 mile Michilens

    Comment


    • #3
      Re: 2008 GX tire change to low resistence - my exp

      Thanks for taking the time to do the science. I am curious what
      kind of "gas" mileage you got on your trip??

      Thanks,

      dbiskup

      Comment


      • #4
        Re: 2008 GX tire change to low resistence - my exp

        Typically I get about 40 MPG, plus or minus a few, when using cruise control and keeping the speed around 65-70 MPH. When I go over a pass, I cancel cruise control and ease my way over then back on CC. Of course it depends on traffic, and weather (winds can be a real bear on 101).

        Another thought occurred to me after I wrote the above tire review, I may want to have my fuel system rechecked, as I have had my car "tuned" by the Santa Ana dealer just before my tire install. This dealer is not certified to service the natural gas system.

        I will report back in a few weeks on what may become from that servicing, by Power Honda, somewhere here in OC.

        Comment


        • #5
          Re: 2008 GX tire change to low resistence - my exp

          Great review!!! Thanks for the post.

          As far as the cabin noise, does anyone have suggestions for tires that reduce the cabin noise and does not adversely affect other performance issues?

          Tyler

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          • #6
            Re: 2008 GX tire change to low resistence - my exp

            Wow you turn it off at the light? I was under the impression it wastes more fuel to restart the car than to just let it idle? Plus you kill the starter too by having to restart it so often.
            Now for gasoline vehicles. I for one when I ran my tow business never turned off my gas tow trucks at the light or even when refueling. I know the danger of static fires at refueling and was very, very careful. I never replaced a starter on any tow truck and always got over 300 thousand miles on each truck plus sold them running after that.
            Mario
            AAA CNG SYSTEMS
            CSA Certified CNG Cylinder & Fuel System Inspector

            Comment


            • #7
              Re: 2008 GX tire change to low resistence - my exp

              Are my tires on my 09 low resistance? They are Dunlaps or as my racing friends call them "One Laps". I have noticed they are quite noisy as compared to the Hangooks I had on my older GX.
              BLUE 09 GX

              Comment


              • #8
                Re: 2008 GX tire change to low resistence - my exp

                Originally posted by CNGCARS View Post
                Wow you turn it off at the light? I was under the impression it wastes more fuel to restart the car than to just let it idle? Plus you kill the starter too by having to restart it so often.
                Now for gasoline vehicles. I for one when I ran my tow business never turned off my gas tow trucks at the light or even when refueling. I know the danger of static fires at refueling and was very, very careful. I never replaced a starter on any tow truck and always got over 300 thousand miles on each truck plus sold them running after that.
                There are huge efforts now to reduce idleing longer than 10-15 seconds, particularly by deisels and heavy vehicles. I forget the number of millions of gallons of wasted fuel, but it's huge. It's spawned a whole range of anti-idleing technologies and truck stop electrification programs. Only ecoterrorists idle these days. Besides, any diesel truck should go 300k-500k miles.

                Comment


                • #9
                  Re: 2008 GX tire change to low resistence - my exp

                  I don't have before and after hard data to support it, but my first experience with LRR tires was a couple months ago when I switched from using some fairly new Kelly M&S tires to some Michelin Hydroedge LRR's with nitrogen fill that I bought from Costco. I got the set for around $470 on discount. They made a definite difference in how smooth the vehicle drives and I am pretty sure of around a 5 to 7 % change in fuel economy from what I had. This is on a 1997 Ford Crown Vic. They also seem pretty quiet. Anecdotal at best I know, but I thought I would throw this out there.

                  Comment


                  • #10
                    Re: 2008 GX tire change to low resistence - my exp

                    The Crown Vic should be quiet, I'd hope. Honda Civic's are infamous for cabin noise. I recall a CRX that sounded like the inside of a drum. Good car. Crap brakes, but I digress here.

                    To address the matter of fuel shut-off at a light, what I have read is if its more than 10 seconds, then you can save fuel by shutting off the engine. I do not do this frequently so the starter should be ok. Here in OC some of these bruser lights can take 1-1.5 minutes of wait time. I get to know which are the worst and then when I hit a fresh red, off goes my car. I do the hard look left and right to anticipate when to start-up again.

                    As for the LLRs, the purpose of this thread, on the matter of the 2009 cars, Curt can address this better than I can, thought I'd be my fancy civic wheel covers that the car is not equipped with LLR tires from the factory. This was an idea I came up with to see if there is any more I can squeeze out of my mileage.

                    I am going back to the Bay Area this weekend and will report if I see any improvement, though I have not had my gas system serviced since new, will advise.

                    Comment


                    • #11
                      Re: 2008 GX tire change to low resistence - my exp

                      Interesting conclusion on the tire testing. I know that even if there were an improvement in fuel economy that it would have been marginal. GM did an extensive amount of testing for the Saturn EV 1 and Chevrolet EV 10 (which I like to call it) on rolling resistance and proper tire selection. I thought they were made by goodyear, but honestly can't remember. Although I would like to see a noticeable reduction in fuel consumption, I will need to see some real numbers that show me that lower rolling resistance also equates to higher mileage ratings of the tires. It also takes a significant amount of energy to manufacture, ship, and install a tire and the numbers may not add up if one is taking to total cost involved into the equation. Generally a low rolling resistance tire will have a higher durometer rating with a stiffer side wall which should reduce delection and the tire contact patch with the road. I will try to find some of the testing Data for the EV1 and see how they drew their conclusions. If anyones knows a tire Engineer, then please get them to chime in on this, as I would find the subject very interesting.

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