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#908 of 1765 Do a little research on topping off... by larsb Sep 30, 2004 (2:57 pm)
Wayne, I stopped topping after doing a little research on the subject - check it out yourself and rid yourself of such an environmentally nasty habit which can also damage your catalytic converter.....even the EPA warns against it....   Yes, my HCH is a SULEV with a 13.2 gallon tank. I have yet to trust the gauge enough to drive it emptier....I will over time do so, however.
#909 of 1765 no topping.... by larsb Sep 30, 2004 (3:02 pm)
some articles for why you shouldn't be topping off your gas tank (just stop at the first click!): http://www.patgosscarworld.com/donttop.htm http://www.phillyburbs.com/pb-dyn/news/113-06292004-323947.html http://enviro2.blr.com/display.cfm/id/48985 http://www.sbcapcd.org/edu/dont-top-off.htm http://www.weights.az.gov/Shoppers/gasstations.htm http://www.viamagazine.com/top_stories/auto/how_bad99.asp
#910 of 1765 by xcel Sep 30, 2004 (3:57 pm)
Hi Larsb:   ___First off, if your HCH is a SULEV, it is the PZEV version. That being said, you only have a 11.9 gallon capacity tank. With that and the fact you have placed 12.5 gallons in it leads me to the conclusion that you have already surpassed the capacity of your HCH’s tank. The ULEV HCH on the other hand is a 13.2 gallon capacity tank.   ___In regards to topping off, did you really think I haven’t read at least 100 more articles then the ones you have posted? How many times have I had problems? 0 in 800,000 miles. I don’t dump fuel all over the side of my car either as it is to precious a commodity to do so. With that, guess how many times your drive to the station and pumping gas in poor climate has caused you to wish you weren’t sitting at the pump filling your tank? How many more trips to the gas station and back have you wasted fuel for no apparent reason anyway? You may as well just pour fuel out on the pavement and light it off each time you don’t approach the actual range of your automobile less .2 to .4 gallons as it is such a waste to drive to the station and back needlessly which is what so many people do.   ___I get the same stuff from those that think 50 #’s in your tires is a bad practice as well. You know, when burst pressures are closer to 125 – 150 #’s? Oh well, let us all close our eyes and keep wasting a precious commodity simply because it is the right thing to do. Blessed are those that don’t have a clue as to what there present automobiles are truly capable of   ___Good Luck   ___Wayne R. Gerdes
#911 of 1765 by mauto Oct 01, 2004 (12:47 am)
Um, I think I started this whole fuel capacity debate so let me add this:   When Honda (and others) say the Civic tank is 13.2 Gal, they probably don't mean that it's 13.2 if you fill it all the way up the fuel filler pipe until it pours out the hole. It's probably somewhere below that quantity. Therefore it seems that you can always squeeze more in (though you shouldn't).   My original message had more to do with pump shut-off variances which directly affect MPG calculations. I've read numerous accounts of people getting 35mpg on one tank and then, miraculously, 50mpg on the next. This is not because the car found some new untapped efficiency, but because the 50mpg reading was calculated by a not quite refil of the tank - probably the pump shut off early and the driver thought, hey, 50 mpg! Replies to this message: misterme (Oct 01, 2004 5:28 pm)
#912 of 1765 Re: The new Civic Hybrid [ike3] by greencars Oct 01, 2004 (1:27 am)
Replying to: ike3 (Apr 11, 2002 12:25 pm) The Department of Energy completed a million miles of hybrid testing and found that the four Honda Civic Hybrids they were running averaged 38.0 mpg over a collective 284,000 miles. Six Honda Insights averaged 46 mpg over 347,000 miles, while six first-generation 2002-2003 Prius sedans averaged 41.1 mpg over 380,000 miles. A single 2004 Prius driven 16,000 miles was returning 44.6 mpg. The testing program is managed by the Idaho National Engineering and Environmental Laboratory, so it's credible.
#913 of 1765 topping off and fuel tank capacity by larsb Oct 01, 2004 (6:14 am)
quote-"With that, guess how many times your drive to the station and pumping gas in poor climate has caused you to wish you weren’t sitting at the pump filling your tank?"-end quote   Firstly, regardless of if you drive to the pump every single day, you are not driving less or more than if you drive to the pump once a month, because you can only get mileage out of the gas in your tank no matter where or from you are driving. In other words, you can't drive more or less miles on more or less gas regardless. No matter when you fill your tank, 700 miles is 700 miles. If 8 of those miles was driving back and forth to the gas station, it matters not - 8 miles driven is 8 miles driven whether or not you are in Kalamazoo or Moscow.   If it is YOUR CHOICE to drive fewer times to the gas station and top off, just don't be under the assumption that you are immune to the harmful effects of topping off, because you certainly are NOT.   So it does not matter one whittle whether you fill your tank 18 times a year or 48 times - you still drive the same amount of miles and use the fuel you use before you need gas - filling up more or less often does not "cost" more gas - but what it DOES DO, if you top off, is all the harmful things that you know topping off can do. Good for you that none of your cars have suffered damage - but it's not an Urban Myth that such damage can and does occur. So harming the environment and your car by topping off does not make sense no matter how you slice it, or even even if you have driven 8 MILLION miles.   And as far as my tank capacity, I will check to see for sure what version of the car I have, but I'm darn near sure my tank is 13.2 gallons. And I know full well tank capacities are a "manufacturer's estimate" and that there are variations. But I can assure you there is no way I put 12.5 gallons into a tank rated for 11.9.....I'll get confirmation of my tank capacity later today, but my owner's manual says 13.2......
#914 of 1765 My HCH is a ULEV 13.2 gal capacity by larsb Oct 01, 2004 (6:30 am)
"** 2004 Civic Hybrid models distributed in California, New York, Vermont, Maine and Massachusetts meet Advanced Technology Partial Zero Emission Vehicle (AT-PZEV) standards."   I bought mine in Arizona. The AT-PZEV model is 11.9 capacity, ULEV is 13.2
#915 of 1765 Re: Tire Pressure [mauto] by blueiedgod Oct 01, 2004 (8:44 am)
Replying to: mauto (Sep 28, 2004 4:50 pm) Solution:   Use at least 10 tankfuls of gas returning to the exact same pump every time. Calculate your mpg each time and average all 10 readings to arrive at a reasonably accurate number.   It's possible to fill-up, drive 50 miles, fill-up again and the pump shuts off after only half a gallon added (pump shut-off calibrations differ at different pumps) and calculate your mpg to be 100. Of couse 100 mpg is impossible.   I agree about filling up at the same pump every time, and as close as possible to "empty" but what about temperature? Fuel is measured in volume and not mass. If you fill up in the early morning when temperature is 50°F (10°C or 296°K not sure on the conversion) and then then next time you fill up at 4 pm when temperature is 80°F (26.7°C or 312.7°K) the volume will be different.­ Replies to this message: larsb (Oct 01, 2004 8:52 am) gagrice (Oct 01, 2004 8:56 am) blueiedgod (Oct 01, 2004 2:57 pm)
#916 of 1765 Re: Fuel variances due to temp [blueiedgod] by larsb Oct 01, 2004 (8:52 am)
Replying to: blueiedgod (Oct 01, 2004 8:44 am) You are absolutely correct - by filling up in cooler weather you do yourself a favor....
#917 of 1765 Re: Tire Pressure [blueiedgod] by gagrice Oct 01, 2004 (8:56 am)
Replying to: blueiedgod (Oct 01, 2004 8:44 am) I agree about filling up at the same pump every time, and as close as possible to "empty"   I disagree with letting your tank get below 1/4 full. There is water and sediment that collects in the bottom of a gas tank and you don't want to pump that into your filter & injectors. Cutting yourself to the very last gallon to set some kind of worthless record is foolish. What happens if you are stuck in a snowstorm and require that fuel to keep warm. It is a false economy to run the tank down to the last little bit. Replies to this message: blueiedgod (Oct 01, 2004 2:57 pm)

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