Question about 1999 Volkswagen Passat

The miles per gallon computer on my passatt jumps one miute its 16 miles per hour next 99 etc and sometimes no reading then all over the place again Any suggestions?

When you let off the gas it should climb upward rapidly. 53..200.. then go blank. If it is as you say then a minute between jumps is normal as dimebar123 stated. If it is changing from 16 to 99 and you have the gas down and are going up hill. I'd have it looked at.

Selvol

Posted on Nov 23, 2008

It's normal not a fault,all do it on instant econony reading,all is well

Posted on Nov 17, 2008

Depends on miles per gallon of vehicle. Average mpg of say 15 mpg would take 15 gallons to travel 225 miles.(15x15=225). At $2.29 per gallon @15 gallons=$34.35. So figure out mpg of your vehicle and do the math.

Feb 27, 2015 | Cars & Trucks

The gas tank holds 18.5 gallons and the car gets 17 - 25 miles per gallon. On the freeway you can expect around 24 mpg.

So for your trip you could go 330 miles on a tank of gas.

14 gallons x 24 mpg

So for your trip you could go 330 miles on a tank of gas.

14 gallons x 24 mpg

May 07, 2013 | Cars & Trucks

The DTE is automatic and is the result of your previous miles per gallon multiplied by the gallons of gas registered in your tank.

Unlike the Trip miles, this DTE number can not be reset. It will vary by the fuel mileage per gallon recorded at each startup. That is why if you filled the tank and showed 400DTE you may have had 20 Gallons multiplied by 20 MPG. But if your new average is 16 MPG then it would show 320 DTE.

Unlike the Trip miles, this DTE number can not be reset. It will vary by the fuel mileage per gallon recorded at each startup. That is why if you filled the tank and showed 400DTE you may have had 20 Gallons multiplied by 20 MPG. But if your new average is 16 MPG then it would show 320 DTE.

Mar 05, 2013 | Lincoln LS Cars & Trucks

the fuel pressure regulator will not do it. you need to look at spark plugs ,wires ,air filter, fuel filter. tires pressure if tires are under pressure can cause bad gas mpg

Jan 23, 2013 | 1992 Cadillac DeVille

One tank of gas is not enough to compare mileage. Or are you saying the computer's readout of mpg estimate is showing less? Try a tank or two of premium and see if that helps. Keep track of gas mileage. Driving techniques have a lot to do with gas mileage, as does long trips vs. short trips, highway cruising vs. city driving. For best mileage, do regular maintenance and keep the car in top running condition-good spark plugs and clean filters and clean oil ! Attend to minor problems before they escalate.

If you want to check actual miles per gallon, start with a full tank. Write the odometer reading down, and go. Everytime you put gas in, write down the amount. When you are close to 1,000 miles from the time you started, go fill the tank and include that amount of gas to your previous list. Now add up all the gas used and divide it into the miles to get miles per gallon. (976 miles/31.8 gallons = 30.69 mpg ) . Only one tank will skew your numbers, might be off cause the tank was filled more to the top than the previous fill-up. About a thousand miles of driving will give you a very accurate figure of miles per gallon for your car.

If you want to check actual miles per gallon, start with a full tank. Write the odometer reading down, and go. Everytime you put gas in, write down the amount. When you are close to 1,000 miles from the time you started, go fill the tank and include that amount of gas to your previous list. Now add up all the gas used and divide it into the miles to get miles per gallon. (976 miles/31.8 gallons = 30.69 mpg ) . Only one tank will skew your numbers, might be off cause the tank was filled more to the top than the previous fill-up. About a thousand miles of driving will give you a very accurate figure of miles per gallon for your car.

Jun 21, 2012 | 2003 Toyota Camry

It just depends on your tank size. You probably get about 15 -18 miles per gallon. 13 gallon tank would be around 200 miles. 15 gallon tank around 232 miles.

Mar 06, 2011 | 1997 Cadillac Eldorado

Start with changing fuel filter, then if that doesn't work, your fuel pump may be going bad.

Mar 10, 2010 | 2001 Ford Taurus

My pt gets only 16 to 18 miles per gallon.check your air filter.

May 24, 2009 | 2006 Chrysler PT Cruiser

hey

at the begging u should clarify how many gallon u used.

112 miles at 28 miles per gallon --> 4 gallons burned (112/28)

So that means we leaked 11 - 4 = 7 gallons

Now figure out how long the car was driving.

112 miles at 64 miles per hour --> 1.75 hours

So, leak was at a rate of 7 gallons in 1.75 hours

7/1.75 = 4 gallons per hour leaked.

at the begging u should clarify how many gallon u used.

112 miles at 28 miles per gallon --> 4 gallons burned (112/28)

So that means we leaked 11 - 4 = 7 gallons

Now figure out how long the car was driving.

112 miles at 64 miles per hour --> 1.75 hours

So, leak was at a rate of 7 gallons in 1.75 hours

7/1.75 = 4 gallons per hour leaked.

Jul 10, 2008 | 2008 Chevrolet Corvette

About 11 MPG. I had to convert KM to Miles. Of course this is for "highway" driving without a lot of stops and starts. I didn't find any information on city driving, but I would guess that it would be around 8 MPG.

May 15, 2008 | 2004 Ferrari 360 Modena

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