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Guess My Mileage Contest!

In about two weeks, I will be embarking on a nearly 2000 mile road trip from the "right" coast to the "left" coast of the United States. I will send the person that guesses my fuel economy over the entire trip a $10 (USD) bill and 1 instructables patch.

Rules
1. Thou Shall Not Exceed My Mileage
2. Thou Shall Guess a Number Ending in the Thousandths (xx.xxx)
3. Thou Shall not guess a previously guessed number
4. Thou Shall guess MPG (please no l/100km et. al. - just to keep the rules more simple)
a. If no one guesses exactly, the guess closest, but not exceeding the real number wins.
b. If two people guess the same number - see rule 3. The first person's guess is valid
c. You can change your guess by replying to your original guess - once your guess is changed, it can be taken by someone else.
d. Guesses that do not accurate to the thousandth will be ignored


Here's some clues to assist your guessing.
Car
2000 Volkswagen Jetta
2.0L Naturally Aspirated Gasoline Engine ~110hp rated
Currently 102,xxx Miles on the Odometer
5 Speed Manual Gearbox
Oil change ~1500 miles ago (it will not be changed for another 9-10K miles)
Tires inflated to 50/55 HOT - these are all seasons
Grille Blocked Off
Passenger Mirror Folded in (possibly will be removed)
Scanguage2 to monitor coolant temperature, trip mpg, TPS etc.

Cargo
Possibly 1 mini fridge >100lbs
Me: ~130lbs
Passenger ~150lbs
Two suitcases (one will not exceed 50lbs)
Possibly a third suitcase (not exceeding 50lbs)
Lets tack on an additional 200lbs for things I'm not seeing now

EPA Estimates
24mpg City
31mpg Highway
27mpg Combined

Me
I use hypermile driving techniques... That is:
1. Accelerate based on Brake Mean Fuel Consumption Charts (~2500-3000 RPM - 50% throttle = most efficiency)
2. Coast and Burn with 3+++:1 coast-burn ratio (engine either off or idle)
3. Engine Off at stoplights and approach
4. Windows UP - AC OFF (this may change, but that's currently how I'm riding | AC will trump windows)
5. I will not exceed the speed limit - I may travel below for optimal fuel economy
6. Bump Start where applicable (following the same method the Prius uses to start its ICE)

Route
Currently being discussed and looked over. I20 is looking promising, but it's up in the air.

Gaslog
Please take this with a grain of salt. I only just recently started hypermiling (beginning of April lets say). So only the last tank (which was 100% city) reflects that.

My Gaslog

Calculation
Calculation will be based off the sum of the miles (accurate to the tenth) divided by the sum of the fuel pumped (accurate to the thousandth). Everything will be based on receipt, not scangauge2 data.

Changes
This is the section that I post changes to my car, cargo etc.. A change can be as basic as a bit more anticipated weight or as drastic as major aerodynamic modification or mechanical. A possible change may be a hot air intake.


Finally, a note about my oil changes.... I send an oil sample to Blackstone Labs for oil analysis. My last oil change interval was a tad over 10K miles -- and the lab report indicated my oil was still good - everything was good except a slightly high Cu level. Not in the danger zone, but something to watch. My point is... Don't give me any crap about 3K miles - I like my oil films established and don't need constant oil changes screwing that up -- that's why I pay for oil analysis (besides, it comes out cheaper in the end anyway).

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mhkabir7 years ago
About 35.23 or so
rhett8 years ago
who won this?
noahw10 years ago
Having made the trip from NY to CA last spring in my old 1994 Honda Accord and being surprised by my own mileage I am betting that you will get better gas mileage than your expecting - there is nothing like the open road to let your car really show what it can do!

If you really want to improve gas mileage just drive straight through the nights. That means less stops, less ideling, less traffic and more efficiciency! Of course, no sleep = fatigue, and that means a higher likelihood of something going wrong, and if that happens, then gas mileage really isn't something you will be concerned with. So with that in mind, take some sunflower seeds for the road and put the pedal to the metal during the day time.

My guess is 28.790 mpg.

I'll be waiting on the "left" coast for my 10 dollars when you get here.
trebuchet03 (author)  noahw10 years ago
Traffic is a big concern.. I'm getting construction information from AAA and have been posting route requests in a bunch of forums... I'd prefer driving during the day because barring traffic, daytime is more efficient due to hotter air temps :) No pedal to the metal - at least not permanently... Coast and Burn -- Pedal to the 50% throttle - then 0% :D
Aeshir10 years ago
Lol. Picked a fine time to do this, with the high gas prices and all. Well good luck anyways.

Here's my guess anyways, kind of weird quick average of everybody elses guess because I don't know how to calculate it.

37 MPG
trebuchet03 (author)  Aeshir10 years ago
I have a whole spreadsheet setup.... To fly over - it would have cost me more, unless fuel exceeded ~$3.50 which it very well may, but at the same time - airline tickets would go up.
rhett10 years ago
36.838 mpg!
You can get from one coast to the other in under 2,000 miles? that is hypermiling.
trebuchet03 (author)  fungus amungus10 years ago
Google seems to think I can :p I think it says 1700 miles :)
Is your Google the same as my Google? Looks like you're starting from Orlando and the shortest route to the Pacific that I found was ~2,400 miles.

Google trip
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