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  • GX Mileage Record

    Just drove from Southern California to my home in Colorado Springs, Colorado after taking delivery of a new 2009 Honda Civic GX. May have set a new GX mileage record for a stock cylinder of CNG on one segment of my trip. This is all true and not exaggerated.

    Arrived at the Questar pumps in Rock Springs, Wyoming about noon last Sunday, Oct. 12th. Air temperature was just above freezing. Had gotten a great fill at the Questar pumps in Evanston, Wyoming the evening before. But, all along I had concerns about the longest leg of my trip, approximately 260 miles from Rock Springs to Cheyenne. Found the pumps in Rock Springs and put in 2.24 GGE ($1.25 per GGE). Went and had lunch for about an hour, came back and topped off with another 1.06 GGE. Got back on I-80 eastbound and set the cruise control at 60 mph. Even though you go over the Continental Divide, the uphill sections are fairly gentle. Whenever I saw an uphill section coming I would speed up to about 70 mph. Usually I could crest the hill without the transmission shifting down. The GX was turning about 2000 rpm at 60 mph. Probably had some tail wind.

    About half way to Cheyenne I noticed I had used only about a quarter tank of CNG. I breathed a sigh of relief and kicked the cruise control up to 70 mph. I knew I could make Cheyenne with fuel to spare.

    Had gotten a Clean Energy card ahead of time knowing full well that I would need it to fuel in Cheyenne and all other Colorado CE CNG pumps. Arrived at the pumps in Cheyenne about 6 p.m., swiped my Clean Energy card and entered the pump number as instructed. ERROR - INVALID VEHICLE. What the hell, I was never instructed to enter anything about my vehicle. Tried about 6 more times alternating between pump 1 and 2. ERROR - INVALID VEHICLE. Great, called CE on my cell phone, but it is late Sunday afternoon. Of course, no one there. What to do now. I really didn't want to spend the money on a hotel room for the night when I was only about 180 miles from home. Looked at my current fuel situation and counted 7 bars. The next fuel opportunity was in north Denver right off I-25, about 100 miles.

    My next decision was pretty stupid. I had been in Las Vegas a couple of days before, so I guess I still had the gambling bug. Decided to go for north Denver. Figured if my CE card did not work there I would get a room in Denver and contact CE in the morning.

    Well, needless to say, I MADE IT. Still had 2 bars lit, but I think the second bar was about to go out. My CE card worked and I was able to fuel up for the last 80 miles to Colorado Springs and home.

    I kept very accurate records on my trip. Total mileage from the Rock Springs pumps to the north Denver pumps, 356 MILES!! Divide that by 8 GGE, 44.5 mpg. I guess I was real lucky (or a hypermiler) for a newby.

    Can anyone top 356 miles (2 bars still lit) with a stock GX CNG cylinder?

    Dick Sommer

  • #2
    Re: GX Mileage Record

    I have considered many times the trip between Rock Springs and Cheyenne, wondering if I could make the distance so that I could drop down to Denver and visit relatives in the area. Good to know that it's possible in a GX. Were you the only one in the car? What luggage/extra weight did you carry?
    _____________________________________
    '12 Blue Mist Metallic Civic Natural Gas; '03 Galapagos Green Civic GX; '07 Alabaster White Civic GX

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    • #3
      Re: GX Mileage Record

      Two things were working in your favor. 1) the pump was obviously giving high pressure (3600 or more). And 2) it didn't "derate" it like it's supposed to at cold temperatures to allow for possible warming up later. So, you got significantly more than 8GGE in that tank.
      02 GX
      01 GX
      03 Crown Vic
      06 GX
      Home Fueler

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      • #4
        Re: GX Mileage Record

        Could have been as much as 10% extra fuel.
        02 GX
        01 GX
        03 Crown Vic
        06 GX
        Home Fueler

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        • #5
          Re: GX Mileage Record

          I believe the air temperature (around freezing) and weight of the vehicle (just me and minimal luggage) definitely worked in my favor. Also, keeping the rpms down and downshifting to a minimum helped. On a hot day with a family or 4 in the car, NO WAY.

          The evening before my 356 mile run, refueled at Questar, Evanston, Wyoming. Put in 6.8 GGE. Stayed the night. The next morning got another 1.44 GGE in. 8.24 GGE, not bad,

          Dick

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          • #6
            Re: GX Mileage Record

            44MPG at 65 MPH is about what I get with an 07. Actually getting the 8.24 GGE fill? I have never received more than 7.3GGE.

            You were quite fortunate.

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            • #7
              Re: GX Mileage Record

              So far the farthest I have gone in my 09 is 206 miles with 3 bars left, it took 5.7 GGe @3700psi, I was driving 75+ and that included city driving, 36mpg. I am going for a record mileage run today and tomorrow, filled today in Moreno Valley, then to work, 55 miles (incl bank run) then home and back to work, another 145, then it looks like I will be filling in Anaheim tomorrow night, another 10-15 miles. I will continue driving around 66 mph. The numbers may not come out so accurate filling at different stations, and so far at the MV station (3 fills) I have got 80-81% but averaged around 38 mpg.
              BLUE 09 GX

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              • #8
                Re: GX Mileage Record

                Wait until the engines gets broken in, then check it again, Johnny. When you went to vegas with me we averaged 41mpg on the return trip. I normally get 38.5-40 on the freeway in my old 2004.

                Sounds like you're enjoying the new ride... Happy New Years, Johnny!

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                • #9
                  Re: GX Mileage Record

                  Thanks Curtis! Happy New Year to You!
                  Yes I was surprised how much farther I can go with less worries. It did concern me a bit when I filled the 5.7 GGE because the pressure in the tank was 800psi. I've noticed in the past when the light came on in my 99 it was usually around 900-1000 psi, but it must be the temperature difference. I guess I will see when summer rolls around. I hope my local station will drop their price ($2.027) soon, as I miss the convienience. When I first got the car I did not even bother with the MV station, but at 1.30 it's worth the extra 20 min, it's almost the same distance on my commute tho, I just gotta drive thru the farm country, San Jacinto, Lakeview and Perris.
                  BLUE 09 GX

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                  • #10
                    Re: GX Mileage Record

                    I too have looked at the Rock Springs east leg and wondered about the possibity of running to Denver from SoCal. I wish I had the range to get over the divide on the I70 with my wife and son. I went to school in Bolder and have many fond memories of Colorado. I'd love to share those in the GX... Do you think we could get Honda / CE and others to sponsor a CNG tour of the west? All they would have to do is to park a tanker at specified mid-points along the route, LOL.


                    JetBoat, I found that my mileage and performance got better over the first 10K miles. Are you enjoying the new car smell?

                    Chris
                    Last edited by SCChris; 01-09-2009, 10:02 AM.

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                    • #11
                      Re: GX Mileage Record

                      Originally posted by jetboatjohnny View Post
                      Thanks Curtis! Happy New Year to You!
                      Yes I was surprised how much farther I can go with less worries. It did concern me a bit when I filled the 5.7 GGE because the pressure in the tank was 800psi. I've noticed in the past when the light came on in my 99 it was usually around 900-1000 psi, but it must be the temperature difference. I guess I will see when summer rolls around. I hope my local station will drop their price ($2.027) soon, as I miss the convienience. When I first got the car I did not even bother with the MV station, but at 1.30 it's worth the extra 20 min, it's almost the same distance on my commute tho, I just gotta drive thru the farm country, San Jacinto, Lakeview and Perris.
                      how do you test that you have 800psi in the tank? I'd like to have the device too if there is one

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                      • #12
                        Re: GX Mileage Record

                        My local (Hemet) pump has a gauge on it, so when I hook the hose up I can see what the pressure is in the tank. The Anaheim pump has one also about 8 feet up in the air. This morning I filled to 77% and the gauge (Anaheim) read 1100psi with 5 bars left (start) and took 4.3 GGE @3200psi, went 220 miles. Tonight I will top it off and it will give me a more accurate MPG measurment.
                        BLUE 09 GX

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                        • #13
                          My Mileage (MPG) Record

                          The results are in, I got a great fill at my local pump but 2.06/GGE OUCH 2.7 GGE 3700psi @ 52 degrees. I kept my speed under 70, 15-20% city driving, ended up going 301.9 miles on 7.10 GGE comes out to 42.5 MPGGE. I probably did even better than that because my first fill at Moreno Valley was 81% (no pressure gauge). The 220 mile run was easy, I would have gone farther if there were more reliable (Ontario) and 24/7 (Diamond Bar) stations on my route.
                          BLUE 09 GX

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                          • #14
                            Re: My Mileage (MPG) Record

                            Thanks for the update, John. Looks like Phoenix would be a cinch with that kind of range.

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                            • #15
                              Re: GX Mileage Record



                              Very cool 300 miles on a bit over 7 GGE..

                              Chris

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