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522If I'm really determined, I can make a 15 mile cross town trip and average about 20MPGs. But that type of driving ticks a lot of other drivers off.

On the highway at 55-60 mph driving like a grandma it is easy to get 26-28 mpg.

Driving at 75-80, it is virtually impossible to get more than 22mpg.

Driving through Montana and Wyoming at 85-95 mph, the average was 19mpg for about 800 miles.

Conservative driving really ads MPGs. Having AC off and looking ahead really helps increase fuel economy.

4But if they use ethanol in winter.

It is not unexpected.

9,152realeasy, I managed to milk just over 500 miles from a single tank of gas (which worked out to just over 28 mpg).Best Regards,

Shipo

9,8729,152Best Regards,

Shipo

9,8729,152Best Regards,

Shipo

491The winter factors are:

(1) Increased aerodynamic drag due to air being denser when it is colder.

(2) Decreased traction on wet, snowy, or icy roads lowers efficiency of power transmission.

(3) Traffic snarls in winter increase the time of trips, and cause more braking

(4) Longer warm-up time in cold weather. Engine uses more fuel during warm-up

(5) More idling to keep heater on for occupants remaining in the vehicle when someone goes into a convenience store

491Here's a puzzler: If I take a trip to the top of a mountain and back, getting 9 MPG on the way up and 90 MPG on the way down, what is my average MPG? This is a simple math problem and not a trick question, though the answer is surprising to some. Answer to be provided in a subsequent message...The reason why there is any problem at all with this sort of calculation is that in the US we express fuel use as

distance travelled / volume of fuel consumed (or mpg),

rather than

volume fuel consumed / distance travelled

gpm = gal / mi, or we could use gal / 100 mi to avoid dealing with small decimal fractions. To get gal / 100 mi = 100 / mpg. So 25 mpg would be 100 /25 = 4.0 gal / 100 mi.

The latter system is what is used in Europe except they use metric units: L / 100 km.

To do the "puzzler" we average the equivalent gpm (or gal/100mi) values and then convert that back to mpg by taking reciprocal of the result.

Ave mpg = 1 / ((1 / 9 + 1 / 90) / 2) = 16.36 mpg

If the distances for the two different mpg values are not the same, then the calculation is a weighted average where the weighting factors are the fraction of the total distance.

Ave mpg = 1 / (f1 / mpg1 + f2 / mpg2)

Where f1 = d1 / (d1 + d2) and f2 = d2 / (d1 + d2).

This more general formula works when the distances are equal or unequal.

This is the formula for calculationg the combined mpg from the city and highway mpg values. Consider a vehicle which gets 22 mpg city and 30 mpg highway. The USDOT assumes that 55 % of the driving is city and 45 % highway. So the formula for combined mpg for 22/30 city highway is

Combined mpg = 1 / (0.55/22 + 0.45/30) = 25.0 mpg

The general formula is

Combined pmg = 1 / (0.55 / mpgcity + 0.45 / mpghwy)

4911,3949,152FWIW, that was in our older 1998 3.8 liter DGC Sport van that had 145,000 miles on it at the time.

Basically I told you that as a way of suggesting that during the summer you might could well get better mileage than what you're seeing now.

Best Regards,

Shipo

1,394I'm OK with 24-25 mpg on the highway. I think that's good for a 4200 lb, 3.8L vehicle. I wasn't expecting anything better.

9,152Best Regards,

Shipo

5First tank of gas came out at 12.75 mpg.

Since then I have driven 12,000 miles.

Over all mileage is 21.00 mpg.

Best on the road was 28.44, 27.38, and 26.54.

9,152Best Regards,

Shipo

5Filled up 40 times.

Purchased 575.6 gallons at average $3.03 per gallon to drive 12,087 miles at total cost of 1,743.58 with overall 21.00 mpg.

35Thanks for any insight into this situation because the gas prices are KILLING me!

491This is a heavy and large volume capacity vehicle. If you are like me, you got it because it would be great for travelling and for hauling stuff from the garden center and home store, but in the end most trips are short and lightly loaded, so a small car would serve that at maybe 24 mpg. (Unless you got some mileage optimized vehicle which would not fulfill oth er needs, then 24 mpg is about what you could get in an efficient widely useful vehicle in suburban use.)

If you drive 12,000 mi / year, then at 18 mpg you use 667 gal of fuel, and at 24 mpg vehicle you'd use 500 gal. A 24 mpg vehicle would save 167 gal of gasoline, which at $4/gal amounts to $667 per year. This is not enough to justify trading in the van to get a more fuel efficient vehicle. Just try to make more efficient use of the vehicle by combining trips, etc.

If you really no longer need a Grand Caravan, you could try selling it to someone who does need one of these real people haulers and will pay a fair price for a well maintained one with a known maintenance history. Then, having sold it, you could make your best deal on say a Caliber, Scion Xb . . . which you would feel better driving. But it would take years to recover the cost of trading. The sensible approach is to just resign youself to paying more for fuel than you had in mind when you bought this vehicle. If the price and availability of fuel really goes crazy then the value of your Grand Caravan will drop precipitiously, but it's already low so you won't lose that much more. You have already taken most of the depreciation hit. And if the cost of fuel goes outa sight then any vehicle you'd get right now might seem like a fuel waster.

2401303 miles on it.

Average long term mileage according to the computer is 20.4.

65% short highway runs at about 65 mph.

35% town driving at about 25-30 mph.

The first few hundred miles were in the 16-19 mpg range.

I'm looking forward to a long stint to see how it does over a couple hundred mile stretch.

832Average long term mileage according to the computer is 20.4.You might want to spot check that with a calculator a few times and see how accurate that is. My 07 Chrysler display is 1-1.5 mpg less than what I'm actually getting.

After 6,000 miles I've noticed that my average fuel economy has increased by around 2 mpg.

9,872I was somewhat amazed, but it gave me 25.5 over 400 miles. The principal speed limit was 65, but I was traveling with friends (one hauling a heavy load) so mostly went 55-60, with some faster jaunts when I was playing catchup after a stop to nurse the baby, let my son take a potty break, etc.

I was impressed and was certainly not expecting it to be that high.

Average fuel economy this summer while commuting, driving around town, etc., is slightly less than 20.5: Up from 19 last summer after implementing driver modification.

186,000 on the ticker and counting....

9,152Good Job.

Best Regards,

Shipo

9,872I still do not like it much (driving experience) for around town as compared to a Subaru, but it sure is comfortable on long trips. The more upright driving position and copious leg room makes all the difference.

I purchased a 98 Escort (5MT) last week from a friend leaving town, so I use that now for my commuting (>30mpg) to save on fuel and keep some miles off the van. At about 20,000 miles per year, the van's time was likely to be up soon even with meticulous maintenance. I expect the car to pay for itself in less than six months (paid $800 for it), so if it helps extend the van's useful life by a few years by keeping some miles off it, it will pay for itself over and over again.

6We actually traded our 2004 Durnago with the Hemi engine. We didn't make the trade due to gas prices but knew that the $ savings wouldn't hurt.

So far the dealer put the first tank in (came with the vehicle) and then they filled it up again for us (long story). We're just about at the end of that tank but if I'm calculating right we're only going to get ~14mpg or so.

Is it normally that bad for the first few tanks/miles? I know the tire pressure is OK but not sure waht else could be going on.

The only other thing that might be a factor is that my wife is used to the Durango and you could just barely press the gas and it would take off. I have a feeling she might be pressign the gas farther to try to compensate. Hopefully her driving habits will adapt to the new vehicle.

9,8726My wife's parents have a 2007 t&C and her dad said they get mid/upper 20's.