Is it really as high as .3???

 

Thought so. I need to check again with my GPS tomorrow. I'll get back to you about that.

It depends on the wheel diameter you're running, of course.

 

That just seems awefully high. Isn't that like saying you're going 30% slower than it looks like on the speedo?

 

Okay, checked this vs GPS today over a 50 mile run. The conversion is actually much MORE than .3

Multiplying the odo reading by 1.02624 gives the correct miles, assuming my GPS is correct.

Due to the analog speedo, I can't be precise, but it's about 2.0 mph fast at 40 (GPS says 38.0) and about 2.3 mph fast at 50 (GPS says 47.7). I'm really traveling a hair slower than I think.

When figuring MPG, I'll first multiply the miles by 1.02624. This will also help me figure the total milage logged so far, which is low too.

I've seen this on other threads before, but now I know the exact figure for my tire configuration.

 

Ok, 1.026 sounds more reasonable that 1.3

 

I read a good tip on saving gas--actually getting more gas for the buck (or 3.5 bucks). That is--pump your gas at night when it is the most dense--you will get more than pumping during the day.

 

Does the soil temperature around the underground tank drop at night and cool the gas? Is the gas coolest at night, or after the night just before sunrise?

 

Come on. I'd guess the soil temperature change is minimal, and the volume of liquid huge. Bet there's little change to the density, and the additional gas you'd get is neglegible. Season to season, sure, but not in a few hours.

I'd bet you've better tips for getting more gas from the pump, Old Yeller. How's bout it?

 

tC owner here..but I thought I would chip in.

I have used my Garmin C320 and have found that your measurements are equal to what I have seen. I have never measured actual distance traveled..but I have measured the speed readings.

tC is actually going ~37-38 mph when the speedo reads 40-41 mph (depending on which side you read the mph from). I read about 67-68 mph on the GPS while the speedo says ~72 mph.

I took both with a grain of salt..but it was confirmed within the last two weeks by one of those laser/radar speed detectors that say "speed limit is Xmph; you are going Ymph". The police device measured the same as the GPS.

 

Oh...the whole density change thing..snakes oil. For the ground to change temperatures that fast..you would not want to be pumping gas in that kind of weather (whether you are on fire or a popsicle).

 

Mine checks out at 1.046. xB with automatic

 

I drive stick, and get AMAZING mpg....when I feel like it....

...that and stick is more fun!!

But when it comes to where I live, stick gets better gas mileage because I live in hills, and auto strains to go up the hills, and you have to force it to down shift, but with a manual, you can shift perfectly.....

~Stephanie

 

If you read the EPA sticker I don't believe there has ever been a promise of you getting what is listed. I've always been able to get close on some vehicles and more than what's listed on a few. I'm getting around 39mpg with my xA automatic and don't see where power is a problem. I also have a 2WD Ford Explorer that gets 22-23mpg in the highway. Most of what you're getting is in your foot.

 

Shucks, looks like people have shot down my idea of getting dense gas in the early morning. But maybe cold dense gas is why we all get getter mileage in the winter?

 

Better milage in winter? ..isnt it directly opposite? Gas is different during the winter and during the warmer months...at least in some states. Different detergents and different additives for each version.

As far as EPA rating...look closesly at the sticker. Mine said the big bold 24/30 or whatever...the small print below it stated...Actual usage will get 19-27 city and 21-32 highway.

..or something like that.

 

Gas mileage is better durring the winter because it is colder.....cars like cold weather better.....ever noticed how on a cold morning, your car runs really good and smooth? Or ever thought of why you buy a CAI for your car?? It's for more cold air.....haha!

~Stephanie

 

At certain speeds I feel the auto is more fuel efficient hence the better EPA rating.
Also in the right hands can be driven just as spirited as a stick. The main reason the sticks seem faster is during the launch because of the "granny" fist gear. They also have to be shifted very quickly to avoid bouncing off the rev limiter. While the sticks are being "rowed" the autos are still pulling forward. Plus you need certain skills to get the auto to perform, as in when to use that OD button.

Basically, from say a 25 mph roll an auto should stay about even with a stick. But I still prefer my lower hwy. cruising rpms because I see very little light to light street duty where the stick excels at.
I also feel that a 6th gear wouldn't work well to improve the sticks mpg. because at higher speeds the wind drag would cause the motor to bog down or the clutch to slip under that heavy load trying to maintain speeds above 75-80 mph. Even with the auto and the taller gearing it struggles to maintain a constant speed over 105 mph., well below the engines red line.

 

Actually like crappyman says mpgs during the winter is worse because of the crappy winter blend fuel they sell. My winter figures are always about 4 mpgs lower because of it.
The CAI is about useless supplying true cold air because the TB heats up the incoming air with engine coolant defeating the whole process. It runs "really good" till the TB heats up.

 

Yes because the speedos are calibrated with the larger size bB tire size of 185/65/15. That is the size pecentage difference over the 185/60/15
Here is a link to the confirming info.

http://www.rims-n-tires.com/rt_specs.jsp?postId=906

Wheels: Wheel 1 Wheel 2
Wheel size 15x5.5 ET 38 15x5.5 ET 38
BackSpace 120 mm (4.7'') 120 mm (4.7'')
Tires: Tire 1 Tire 2
Tire size 185/60-15 185/65-15
Section width 185 mm (7.3'') 185 mm (7.3'')
Sidewall 111 mm (4.4'') 120 mm (4.7'')
Tire diameter 603 mm (23.7'') 621 mm (24.4'')
18 mm (3%) taller.

Circumference 1893 mm (74.5'') 1950 mm (76.8'')
Revs per mile 850 825.3
Speedometer Assuming that this is OEM tire and speedometer readings are correct When speedometer reads 60mph (96.6km/h) actual speed will be 61.8mph (99.5km/h): 3% faster.

 

Just to avoid confusion, its .03, not .3. Big difference.