Top 20 - MPG Record Holders

I would disqualify driving for the sake of cranking up the mpgs, and not for any functional purpose. Just my 2cents.

 

Metrics system can display up to 99.9 km/l (235 mpg), much higher limit before out of range. For US units, I suggest 2 methods to overcome the 99.9 mpg limitation:

1. Use "ECO Savings" screen to get the fuel consumed by the Fuel cost displayed. For e.g., input your fuel cost as 1 gallon = $1.00. You can also use $10 or $100 if you want more precision.
2. Use another trip meter but do not reset it. Take a snapshot of it during refuel and you can calculate the 1st fuel consumed = Miles1 / MPG1. At the end of your tank, take another snapshot and calculate the 2nd fuel consumed = Miles2 / MPG2. The difference between the 1st & 2nd fuel consumed can be used to calculate your trip MPG.

Both these methods are using what the computer calculates and not influenced by how you topped-off as what you said in #395.

Vincent

 

Of course you would. You could be the commissar of qualification and personally interview each participant to make sure that functional compliance was 100%

 

Thank you for the useful information. I pay such scant attention to the ECO savings screen that the idea never occurred to me.

 

What ufourya did are somewhat akin to Fuel Efficiency Challenge Marathons done/held by Cleanmpg.com - a hypermiling website/group (except multiple car-driver pairs are competing on the same driving circuit-test route). Not unexpectedly ufourya's results are similar to these marathon runs (if not better). Such marathon results suggest/demonstrate the possible-theoretical upper limits of fuel efficiency for a vehicle. As always fuel efficiency varies significantly based on the driving conditions but as long as those driving conditions are adequately disclosed then the results can be assessed within the context-methodology used (and hopefully we know not to compare apples to oranges). To me such extreme data points are valid if only to describe the extreme fringes/outliers of fuel efficiency. ufourya's FE experiment are like walking along the edge of a fence to me. However, I understand your point - that such extreme methodologies are not achievable or practical in real world driving conditions; might I suggest we separate fuel efficiency based on regular commuting-&-day-trips and fuel efficiency marathon results then? By marathon - I mean mileage which is limited to driving repeatedly (n times) over the same route (or closed circuit) for atleast 60 minutes or more to achieve higher fuel efficiency. By regular commuting-&-day-trips I mean everyday driving back and to a place of work, shopping, and personal business (non business/commercial). [ My guess is that the Prius fuel efficiency for continual all day commercial usage such as messenger-delivery services, taxis, and other commercial usage (e.g. real estate) would be better than regular commuting because of the warm up overhead for the Prius would be less but would be more than a marathon run. ]

 

For a marathon run, the ScangaugeII Xgauge AVG which would give the average mpg (over 99.9 mpg) for the current trip. Since you had two runs your Total MPG marathon estimate := (AVG1+AVG2)/2

 

can't you just switch from "US" to "metric" in the settings to switch between miles/gallon and km/liter, so that you don't have to do all these weird calculations? or would that reset the data?

 

Actually, I split the first day into two segments separated by a 2hour break. Your point remains valid, however. I got out of the habit of using my scangauge to monitor avg fuel usage when moving from my last car to this one. The 99.9+ experience was so rare, I didn't see the need. Now, perhaps, I'll reset everything and begin anew.

My new wheels and tires went on today. I expect a hit for a while.

 

I'm about to bump someone off this list in the next day or so . lookin at something in the range of 68 to 68.5 with a avg speed of about 42.
Prob easily be in the 70s if I could maintain avg speeds like many others on the list of 25-30mph

 

68 mpg with an an average speed of 42 mph is really excellent.
I found that it's really hard for me to achieve 70 mpg if I push the Prius over over 45 mph for too long.By staying under 45 mph - one avoids automatically initiating the Prius' ICE
thus it presents more opportunities to glide.
To get +70 mpg you have to glide alot!

 

changed my setting from "miles" to "kilometer" and all the dash displays continued to show "miles," so i'm not sure what the purpose of the setting is.

 

Pressing and holding the 'trip' button on the steering wheel while on the ODO mode changes the speedometer from MPH to KPH and vice versa. This allows one to drive and monitor speed where it is posted in KPH 0n cars made for the U.S. market.

 

Add me to the list, for now at least. 68.3 with avg speed of 43 mph.
Time of year june 2013. No ac required daily temps in the mid 70s. Little to no rain
technique pulse and glide and getting behind slow semis and cars.
stock yokohamas at 42 psi all around
if wasnt for the high avg speed I could do much better.

 

Dear F8L,

I appreciate your encouragement (#573) so tried it once more again and got further 3 mpg improvement below. Can you please update my record (# 561) with this? This is my 3rd tank since acquisition of this Prius, which was still 30-40% left at 550.9 miles.



May 28- June 15, 2013, 65-90FdegC, 0% rain. I appreciate jsfabb’s advise for tire pressure (#562), but intentionally unchanged it this time (35 psi for all four) to see improvement solely by optimizing mph. I admire Top 20ers with >30 mph like you, but it is impossible in my urban commuting. So I tried 20, 22, 25 mph each a couple of times for my daily commuting with the same conditions otherwise, and found that 22 mph average is the best for me. So I have commuted at ~22 mph as I could and got this. I hope I could stay in the list for a while….

 

Since you folks are feeling generous, how about just adding 10 mpg to the Vagon drivers ?

 

Ufourya, hats off to you!

 

I just saw Vincente's new record.
Arms race brewing ?

 

able to improve on my previous 68.3 I'm currently doing 69.5 at about 350 miles with avg speed of 43. Trying to massage it to 70....

 

Keep those tires inflated, AC off, windows up, fan off, blow through stop signs, check that - don't blow through stop signs (-;