Since one of my justifications to buy this truck was fuel mileage, I have been thinking of ways to increase MPG. I use VRS plus to keep track of my mileage. I like it in that I can track where I buy fuel and if I add any additives to a particular tankful. My average MPG since March is about 15.5 MPG.

I'm trying to get accurate MPG per tank because I am trying see which diesel additive may actually increase MPG. This last time I filled up I was determined to start filling to the same point in the filler neck each fill up. After 20 minutes and hand cramps I was there.

My questions are: How do you check MPG per tank? What, if anything, do you do about foaming? I don't use the overhead display as gospel, instead use it as an aid in being a fuel concious (cheap) driver.

Interested in your replies,

Doug

 

Check this thread.

Cure for the common foam???

I always fill to the top of the neck.

Ed

 

How do you check MPG per tank?
Trip odo miles traveled divided by gallons to fill to the second automatic turn off. I don't waste my time trying to get it full up into the filler neck.

What, if anything, do you do about foaming?
Remove the rollover ball in the fill neck and use high speed truck fill nozzle.
The small automobile station nozzles tend to foam a lot.

 

Ok, infidel, you got me. whats a rollover ball, and how do i get it out?

Doug

 

It's a ball in the filler neck that keeps the fuel in when the truck is upside down.

To remove it loosen the hose clamps for the fill tube and vent hose at the tank, remove the three screws under the fill lid by the cap and pull the whole unit out. You'll see the ball and retainers in there, pull it out and give it to your dog.
Best to this when the tank isn't filled to the brim.

Besides being easy on the throttle the best thing you can do to increase mpgs is run large diameter, narrow tires filled to the maximum recommended psi.

 

Better vent fix on the '03+ trucks-

http://turbodieselregister.com/forum...fuel+tank+vent

 

Ok, this is my first diesel, so please bear with me...

I can't for the life of me figure out the notion of this whole fuel foaming/fill 'er to the rim with brim thing. After reading some posts where this technique was recommended, I tried this a few times, and got nothing out of it but a big mess of spilled fuel all over the ground and down the side of my new truck as well as angry attendants at the station. I haven't been able to get more than 1/4 gallon in after the initial shutoff. To me, fueling up my diesel feels just like gassing up my gasser. Either the pumps I've been using don't cause foaming, or I am doing something wrong. At any rate, I guess I just don't understand the rationale behind it. I mean, if you squeeze in a extra gallon or whatever, it won't change mileage numbers as in MPG... it'll just give you a few more miles before you need to fill up again, but you've paid for it, so what's the big deal? I just can't see how filling up to the neck is going to give you more accurate mileage numbers. Anyone care to elablorate?

 

Ok.

You fill up at a station with a lot of foam, pump clicks off when the foam hits the turnyofferthingy, but tank is short 5 gallons.

Drive around.

Fill up this time at a station with no foam, pump clicks off when tank is actually full.

You calculate your mileage, but you have an extra 5 gallons in there.

Say 500 miles on 30 gallons so 16.6 mpg.

If you would have got the same amount of foam as the first time,
you only would have used 25 gallons during that 500 miles.
That would have been 20mpg.

That's 4 mpg better than you thought.

Now, if you fight the foam at each fillup, filling with liquid fuel to a set point in the filler neck.
(I fill to 1 inch below the breather tube hole myself)
Each time you will fill it to the exact same spot,
thusly you will get much more accurate MPG figures.

You must not have very foamy fuel there.
I can get anywhere from 1 to 5 gallons in after the initial click-off.


phox

 

In other words unless you want to figure out your mpgs it doesn't matter.

 

Thanks phox,
I think I have a better understanding now... and you're right, the fuel here must be fairly foam free... hopefully that's a good thing

 

Thanks for the replies. I'll just have to get used to the extra time to fill up. Or find an aftermarket system that shows accurate, real time fuel economy.

Or not worry about it!

Doug