Actually getting 400 miles each tank?

[larson701]

To d0sitmatr: you can change the bias (not sure what it is really called) from the 'fillup' screen. After a couple of fillups, the calculated and SGII total fuel used values should match and the mpg values will then match as well.

 

[d0sitmatr]

To d0sitmatr: you can change the bias (not sure what it is really called) from the 'fillup' screen. After a couple of fillups, the calculated and SGII total fuel used values should match and the mpg values will then match as well.

thank you for the tip, I didnt receive any documentation with mine, so Ive been struggling with its uses.

 

[THE Phen]

for people getting over 400 miles per tank let me ask you this.. what is your average speed going down the highway?

According to the speedometer, 72. That's where I always cruised when I was driving that car. Pushed almost 450 one tank.

 

[KMac]

I am still averaging around 380 MPT which is 31-32MPG. Not bad considering the car has 155k miles.

 

[tweety2300]

If you think about it brand new cars get 35ish mpg on the regular some get 40-45 but think about a car payment and higher insurance and I'd rather stick to 30 mpg

 

[Stickman]

No fancy calibration devices. In order to eliminate pump differences, each fill up I fill to top of tube so I can see fuel. (from dry actually holds 15.8 gal).
Best I ever got was 39mpg, 170K, 2003 end of yr P5, premium fuel. Normal summer 36 mpg.

W/ replacememnt 2002 engine, can't get near that. Best summer 33 mpg. Possibly over the 2 yr production, they found better internal parts, injectors, who knows. Maybe that is why so many reports of different fuel usages.

As Tweety pointed out, still better than new car w/ payments, 30mpg, and less cornering performance.

 

[paper1122]

I noticed that the speedometer reads slow in the wife's P5. I'll be showing 80mph on the speedo but my GPS enabled 9500ix is showing 84. This will mean less miles on the odometer and therefore shorting me on mileage. I was a bit dissapointed by the mileage I got driving home for Christmas, but I was pushing it pretty hard through Orlando and then cruising at 80mph once I was out of Orlando. I'll be interested to see what the next tank brings.

 

[mx-p5]

how the eff? Callie's car hasn't seen more than 300. . . .

 

[tweety2300]

is the speedo off the entire time? mine is perfect untill 78 is 80 and then when it says 88 im doing 94.

 

[paper1122]

Mine is pretty much off all the time, but the difference gets bigger the faster I go. I think it is somewhere around 3% off. It won't affect us too much because my wife drives the car most of the time and she drives like an old woman. When I drive it I have my fuzz buster and I just use the speedo on it.

 

[i12drivemyMP5]

I need to roll to work with the GPS to check my speedo out.

 

[Tusch]

Yeah the speedometer should just be off by a percent as paper said. I know I'm running on my camry's steelies as winters with the camry size tires and my speedo is way off (like 10%) haha but the tires were almost brand new when I junked the car

 

[SoCalMP5]

I have to wonder how accurate people's measurements are with posts like this!

That said, here's my last tank, all city driving:

Low fuel lamp came on at 328 miles
Filled up at 350 miles; it took 13.2 gallons to the stop
350/13.2 = 26.51 mpg city
That should have been about 392.35 miles to bone dry, assuming 14.8 gal tank (it would likely stall before it reached the last 1/2 gallon though).

My only mostly-highway tank since owning this car was 29.71 mpg average at the fill up, with low pressure (~29psi) in the tires (I have since filled them to 45psi; max is 50). Using the same 14.8 number, that's a theoretical 439.70 miles per tank. This required the use of cruise control, and very rarely exceeding 65-68 mph to keep revs low.

I can't wait to start ecomodding this thing. I have a feeling 35 mpg highway won't be hard. That would be 518 miles per tank.

 

[tweety2300]

Ive never been able to get more than 13 gallons in my car I've been able to get about 12.6 in and it was low enough to be shaking at idle... Do the sedans have a smaller tank? My Honda gets way better gas mileage

 

[ijbrekke]

Click my signature, I've been keeping close track of my gas mileage.

 

[SoCalMP5]

Ive never been able to get more than 13 gallons in my car I've been able to get about 12.6 in and it was low enough to be shaking at idle... Do the sedans have a smaller tank? My Honda gets way better gas mileage

I've seen this with other cars too. Up until last night, 12.5 gals was the most it would take, well after the low fuel light came on (it's supposed to come on at around 2 gals remaining). Last night, it took 13.195...I let it go til it stops, then I go to one more stop.

It seems that with most cars, that even though the tank itself may have 14.5 gals of volume, doesn't mean the pump can extract all of it. It would be interesting to drop the tank and measure what's left after the car stalls out from lack of fuel. That's really the only way to know for sure.

 

[tweety2300]

Ya but who wants to do that? Not to mention its bad for the fuel pump to do that

 

[KMac]

Since I started this thread, I am still getting between 30 & 32 mpg. I think this last tank was my worst in a long time at 28 mpg. Most of my driving though is Hwy. It also has to do with what year of MP5 you have. 2002 typically get less than the 2003.5 MP5's.

 

[tweety2300]

I have an 01 mp3 I vary from 26 to 32...

 

[SoCalMP5]

Ya but who wants to do that? Not to mention its bad for the fuel pump to do that

No one wants to. lol. But I might do it this tank to test it out. I've never seen a fuel pump fail from running out of gas. It's mostly a wive's tale. Sure, the fuel pump requires fuel in and around it to keep it cool - but with most cars, the fuel pump is no longer submerged by the time you're around 1/8 of a tank anyway - so if you go until the light comes on, then your pump is already above the fuel level in the tank most likely. On my other car, the pickup tube and prefilter is a good 3-4" below the fuel pump itself.

Really, it's the fuel going THRU it that keeps it cool...and if you run out of gas, you've only run it dry for a matter of seconds. It's not nearly enough to matter unless you do it EVERY tank for a long period of time (probably over a year of running until stalling). I really wouldn't worry about it.