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Well, I filled the car today I ended up pressurizing the bladder such that when I pulled the nozzle out of the filler neck, there was fuel everywhere. It was spewing out of the filler neck. :eek:

How do I fairly report the fuel fill in the mileage logs. My MFD was 72.2 mpg at 481 miles. I pumped 7.901 gallons, but that works out to be 60.x mpg. Almost a 17% difference.

Should I use my current delta of 5% between MFD display and hand calculations and report 7.506 gallons for 481.7 miles or just report what was pumped, which included that which spilled?

This really screws with my spreadsheet as I want to be accurate. It really bothers me to carry this error. I know that in the long run, it won't even be noticeable.

Do what ever you want. There really isn't any good way of dealing with it. You could either use the gallons you put in, or you could guestimate based on the FCD as you suggested. Nothing is going to be perfect though.

Hi Chris:

___Do you think you dumped 1.5 gallons on the ground? I have heard of some Prius II overfills burping back out but not 1.5 gallons worth. When filling Dan’s Prius II for the Marathon two years ago, we didn’t spill a drop although I was topping her off very very carefully as I always do.

http://www.cleanmpg.com/photos/data/500/Prius_II_Marathon_Attempt_-_Fillup_I.jpg
Prius II Marathon - Top off before start.

___In my years of topping off, I may have spilled .2 gallons in total and every drop goes into my tank calc’s as if I placed that much in. It was my fault for any spillage including a few drops so that is my penance ;) We cannot do anything about a small spill now that is has happened but if you feel the need to upload a 72 mpg tank when you were more then likely pulling a low to mid 60’s tank, that is up to you.

___Good Luck

___Wayne

At least it wasn't a full tank of gas stolen like I had in Ft. Worth. A full tank with 8 miles on it. Now that will affect your lmpg. I logged it here and on gassavers. OUCH!!!!

You were trying to pack it full to get that 900 mile tank, weren't you?? :)

Chris, here you are worrying about your mileage when there is gas that's going to run off into the water, killing innocent wildlife. ;) But seriously, I don't know how you would take that into account other than to collect avery drop of gas that spilled out and see how much was actually spilled. I'd just take your 5% and go with it.

As xcel said, it was my pennance for not paying more attention. I used the full 7.901 gallons pumped and accepted the 60.1 calculated value. The value for my next fill will be slightly higher than normal, which will balance out this last fillup since I clearly filled the filler neck. I will have to adopt a standard method of hearing the click, letting the air escape, and then pumping one more gallon or something like that.

Hi Chris:

___You did the right thing imho and I appreciate you being upfront with it. When pushing to the limits, I know its tough to intentionally kick yourself in the teeth but fortunately it is a small price to pay for being above board and I can bet you will not only be much more careful on your next fill, you will take a little time and get another .5 – 1 gallon in her for the 1,000 mile tank that is within your grasp.

___I take as much time filling up and recording data as I add while driving between the limits for a run into Chicago. The results in both cases are well worth it. I hope they are for you as well ;)

___Good Luck

___Wayne