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Old 01-07-2013, 11:37 PM   #1 (permalink)
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Question Fuel gauge inaccuracies

Hey guys,

Have had my 2009 SX4 Sport since new, and has been a totally faultless car. Loving it to bits. Has done some serious off-roading (surprising some) and has about 80,000km's on it now. I have serviced it myself along the way.

Something I've noticed of late, is the fuel guage seems quite inaccurate?

Anyone else seem to get about 200km out of the first half of a tank, and about 120km out of the 2nd half?

Seems a bit odd to me..
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Old 01-08-2013, 07:46 AM   #2 (permalink)
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Fuel gauges are notoriously inaccurate, but they usually indicate very conservatively. So, a 12 gallon tank will probably have 2 gallons left when the needle hits the "E" mark. It may just be that the halfway mark is actually when you have half a tank left, but at the "E" mark you still have 1/8 tank left, which is why you seem to burn through the second half more quickly. That's pure speculation though...
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Old 01-10-2013, 06:30 PM   #3 (permalink)
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The gas guage is operating normally. Please look at the shape of the tank. You will notice that the top half of the tank is nearly double the size of the bottom half of the tank - like the letter L laying on its side. I can get almost 225 miles on the first half of the tank and then maybe 100 miles on the last half when I drive conservatively. I wondered the same thing until I got under the car doing maintenance and checked it out.
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Old 01-11-2013, 11:36 AM   #4 (permalink)
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Nothing new!
Fuel gauges have been like that for the last 50 years, or more.
They are not linear. On some cars you can drive 50 miles or more before the needle even moves off of the Full mark and then the lower it goes, the faster it goes.

I've had cars where you need to find a gas station when the gauge says 1/4 tank.

Good Luck!
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