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hey, MPG question
As some of you all already know, I'm new to the whole MB and car deal. So i was wondering how to find your cars mpg. Thanks for any input
Ali 1981 300 SD |
#2
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Fill your fuel tank. When you do, reset your tripmeter on the dash. The next time you put fuel in your tank pay attention to how much you fuel you put in. Then record the mileage on your tripmeter.
Example: 10 gallons to refill tank 200 miles on tripmeter 200 divided by 10= 20 mpg
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'85 300SD (formerly california emissions) '08 Chevy Tahoe '93 Ducati 900 SS '79 Kawasaki KZ 650 '86 Kawasaki KX 250 '88 Kawasaki KDX200 '71 Hodaka Ace 100 '72 Triumph T100R |
#3
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For most accurate and consistant results, fill all the way to the top of the neck. You'll also go further per tank...
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'91 300D 2.5 Turbo 330K '00 VW TDI Golf, 190K '67 BMW R50/2 '73 Norton Commando Interstate |
#4
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I get about 20mpg right now. I record mileage every time I fill up. Always have. Timing, injector pump timing, Wheel bearings and brakes are on my short list of things to check. Danny
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1984 300SD Turbo Diesel 150,000 miles OBK member #23 (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination |
#5
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How else are you sure the tank was filkled up to the same level each time....diesel foams differently at times and can kick the pump off at different times.
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Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche |
#6
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I drive two diesel cars and always brim both of 'em. Diesel fuel doesn't expand like gas. Just wait till the foam fades -- and top off.
I live in hot SoCal and have never had problems with either one. I also religiously record my mileage, and prefer the accuracy of full fill-ups.
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'91 300D 2.5 Turbo 330K '00 VW TDI Golf, 190K '67 BMW R50/2 '73 Norton Commando Interstate |
#7
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record fuel at each fillup and don't worry about topping up
If you consistently record fuel amount at each fill-up, then small variations in level at end of fillup are immaterial. ANy one fillup may vary quite a bit depending of the fillup level, is car on a slant etc. But such small variations will average out. One easy way to detect changes is to track fuel usage over the last five(or any other number) of fillups. If you see a change that is not weather related or explained by other reasons then items that affect fuel usage should be checked.
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#8
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#9
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__________________
Keep everything as simple as possible-but no simpler--Albert Einstein |
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#11
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A small spiral notebook (and pen) in the glove box are perfect for logging this. I don't bother carrying a calculator, but I can perform a rough reckoning in my head, and the real numbers (odometer reading and amount of fuel added) are there for future reference. I think that routinely logging this information is a great habit to cultivate. Some folks just don't get it, though. That's fine with me until someone starts going off about how big an "improvement" some particular change made to his fuel economy... based on one tankful... figured to three places past the decimal... compared to some vague notion of what he "used to get" as opposed to real records. Others understand perfectly well how it works. In my experience, those folks also seem less prone to realizing huge improvements due to fuel line magnets, "Tornado fuel savers", etc. The little notebook is also a handy place to record date and odo readings when repair and maintenance have been performed. |
#12
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AFAIK, the only problems with that are for gas cars because of the evaporative canister or something to do with emmissopns.
__________________
01 Ford Excursion Powerstroke 99 E300 Turbodiesel 91 Vette with 383 motor 05 Polaris Sportsman 800 EFI 06 Polaris Sportsman 500 EFI 03 SeaDoo GTX SC Red 03 SeaDoo GTX SC Yellow 04 Tailgator 21 ft Toy Hauler 11 Harley Davidson 883 SuperLow |
#13
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To iron out the differences between tanks, calculate the cumulative MPG using the cumulative mileage yu have driven and the cumulative gallons you have bought. If you do not do a full refill, the incremental (for that fillup) MPG for that refill is not accurate, but in the long run the cumulative will absorb that inconsistency. Of course if you rarely fill to the top, you canot calculate MPG reliably at all.
A simple spreadsheet works well to do these numbers. You can also create a historic graph of gas prices so you can yearn for the good old days....
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MB-less |
#14
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Why bother with that? Do you yearn for the good old days where you were paid less too? Besides, that day is gone. nothing can bring it back.
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01 Ford Excursion Powerstroke 99 E300 Turbodiesel 91 Vette with 383 motor 05 Polaris Sportsman 800 EFI 06 Polaris Sportsman 500 EFI 03 SeaDoo GTX SC Red 03 SeaDoo GTX SC Yellow 04 Tailgator 21 ft Toy Hauler 11 Harley Davidson 883 SuperLow |
#15
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How can you tell?
How do you tell how much fuel is already in your tank when you want to measure mpg?
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