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SUVs Honda CR-V Honda CR-V Real World MPG
786 messages, Last post on Nov 26, 2009 at 3:53 AM
You are in the Honda CR-V Forum. Your Hosts are steve_ & tidester
Your Community Leader is varmint.
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Replying to: thestormer (Dec 21, 2006 5:36 pm) By the way, how do you calculate your gas mileage? And how can you know what gas mileage your getting in each driving condition? I calculate gas mileage each time after filling the tank and can only estimate the total gas mileage, not for each driving condition.
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Replying to: coda72 (Dec 22, 2006 5:04 am) When I got my new vehicle, it had a full tank of gas. I drove mostly city miles until my first fill-up. So I divided the number of gallons it took to fill the tank by the number of miles I drove up to that point. After my first fill-up, I took a little road trip. It was mostly highway. While I was on the trip, I topped off the tank. I divided the number of gallons it took to fill the tank by the number of miles I had driven since the last fill-up. That's how I was able to gauge the city vs. highway MPG. Again, I really hope the numbers improve.
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Replying to: thestormer (Dec 22, 2006 10:54 am) After my first fill-up, I took a little road trip. It was mostly highway. While I was on the trip, I topped off the tank. I divided the number of gallons it took to fill the tank by the number of miles I had driven since the last fill-up." 1. The dealer might not have filled the tank completely - disregard that tank. 2. You really need to take the tank almost all the way to "E" to get an accurate MPG. Shorter trips leave too much possibility of putting in more or less gas, and the smaller mileage driven enhances the possibility that the MPG will be wrong.
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Replying to: stevedebi (Dec 22, 2006 11:39 am) I didn't "see" the salesman fill the tank, but he had just gotten back from the gas station when I got there. The "needle" was above the "full" line, so I can only assume the tank was full or close to it. 2. You really need to take the tank almost all the way to "E" to get an accurate MPG. Shorter trips leave too much possibility of putting in more or less gas, and the smaller mileage driven enhances the possibility that the MPG will be wrong. You don't have to take the tank to "E" to get an accurate MPG calculation. If you can calculate the exact number of miles you drove since your last fill-up, and you know the exact number of gallons it took to fill it up, you can calculate the MPG with reasonable accuracy. This logic works when you always fill the tank completely. The distance driven since the last fill-up has no effect on your MPG. As long as you always "fill" it, you can calculate your MPG accurately. I prefer not to wait until the tank is almost empty to fill it up. The last thing I want is to run out of gas. So, here are my exact numbers since I got the car: Drive away from the dealership with full or almost full tank: 174 miles on the odometer. 1st fill-up: odometer=372, gallons=12.534, MPG=(372-174)/12.534=198/12.534=15.797 MPG (mostly city) 2nd fill-up (top off): odometer=472, gallons=4.526, MPG=(472-372)/4.526=100/4.526=22.095 MPG (mostly highway) **So, by your logic, I'm getting a lower MPG because I fill up before the tank is empty? Please elaborate, because I just don't get it.
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Replying to: thestormer (Dec 22, 2006 1:10 pm) |
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Replying to: greenteacrv (Dec 22, 2006 3:01 pm) In addition, a 2/10 error would not occur in the same +/- direction every time. Essentially, for every 5 fill-ups, you would not have a "1" gallon error. Over the course of time, and after numerous fill-ups, a possible 2/10 gallon error would be considered such a small number that it wouldn't even be a factor in the overall calculation. My MPG to date on my 2006 SE is 17.468. My MPG on my 2005 EX was an overall average of 17.088. I arrived at this figure after adding up the miles driven up until my last fill-up (8358) and dividing by the number of gallons put into the car (489.112). If there were a 2/10 gallon "error", the difference in the calculation would be approximately +/-0.01 MPG. My observations so far are preliminary, to say the least, and I was just expressing my hopes that the numbers improve over time. I am extremely disappointed because, although the car is new and not yet broken in, the numbers are SO low.
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Replying to: thestormer (Dec 22, 2006 1:10 pm) I just filled my new CR-V (1500 miles) today. My driving of late has been during cold-weather (25 to 45 degrees) and consisted of mostly very short, 3-4 mile trips. A nasty test of CR-V mileage, I'd say. The dash readout and my math reached identical results, 22.6 mpg. This mileage is terrible compared to our other car, a hybrid Camry, so I drive to maximize mileage. On a 900 mile freeway trip, I was able to match the hwy rating of 28 mpg by staying around 70 mph. Good luck.
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Replying to: thestormer (Dec 22, 2006 3:44 pm) I agree that the gas mileage on the CRVs is not great....our 2005 Altima 3.5 with 250HP is 23-24MPG locally and 28-30MPG on a trip and that car rips!! It also weighs only about 250 lbs less than the CRV. I also own a '04 Honda ST1300 sport touring motorcycle and the MPG is 10-20% less in the winter while using the winter blends gasoline....I am hoping the CRV does better with a few miles on it and when the gasoline is not the winter blend. Dennis
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Replying to: lzc (Dec 22, 2006 3:52 pm) Hypothetical example: Every time I fill up, I get 5.000 gallons. In a previous example, a 2/10 gallon error would indicate I'm actually getting 4.800 or 5.200 gallons. This might affect the MPG in a very small manner on EACH fill-up (1 MPG or less), but over time, the MPG will NOT be affected in any negligible manner (+/-0.01 MPG at 8358 miles). The best method I can think of to calculate MPG is to take the overall miles driven and divide that number by the total number of gallons put into the car. Any so-called "errors" will average out in the long run, so I just can't understand how that can be held as a valid argument. Again, I only listed my preliminary numbers as just that: preliminary. I know that my average MPG will change over time, but changing from my current numbers to the Honda numbers seems like quite a stretch. Even if I agreed with the "partial fill" argument, I don't understand the large discrepancy in numbers. Any "variation" in fill points does not explain why my numbers are so much lower than 1) Honda's claims and 2) others' averages. If my averages, so far, were 21/26, I wouldn't be disappointed. I'd actually be pretty happy. Instead, my numbers are 15.8/22.1. So, I don't understand how any slight "variation" in fill points can account for a difference of 5 MPG. **So, again, I'm getting a lower/LOW MPG because I fill-up before my tank is empty?
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Replying to: greenteacrv (Dec 22, 2006 4:04 pm) My 2005 EX got terrible gas mileage as well and I drove that year-round. I looked at my spreadsheet and there was no significant variation in MPG from one season to the next. So the winter blend really didn't have a huge impact on my numbers. |
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