700 Mile Club

2. And question for point 2 is : is it better to accelerate slowly when ICE start, and keep the monitoring bar in zone just shortly behing ice zone or is it better to accelerate quickly, lets say just as close as to start of power zone to gain the desired speed more quickly and therefore not accelerating so long. I am not sure what is more efficient for mpg/l-km

 

There are a lot of posts here in priuschat using gauges and instruments who can answer that better.

But my gut feeling is it just depends on the temperature. For example during summer, I just drive slowly thru the neighborhoods until the engine is warmed up. But in winter I've watched my engine revving up for several minutes to warm up while I crawled thru neighborhoods. If I had a heated place to warm up before driving (like an underground heated parking at work or mall) would have been better. A block heater is encouraged by a lot of posters here.

 

Thanks today update 200km. 3.6l/100km and last 10th fuel pip keep appear/disappear from 130km till 200km :-O

 

With the G3 mpg discrepancy, you need to average 3.4 or lower to make 700 miles.
I'm sure you'll make the 600 mile club easily.

Post when you finally have pictures.

 

Can somebody recommend me some company from europe, which will rework my prius gen3 to plug in please? I does not want to do all switch with selling old and buying plug-in, so I decided to go this way. Some reasonable +4kW would be all right for my needs

450km done 3.7l/100km Bed is, when I start engine every day, consumption is 99.9l/100km/hummers does not have this high and slowly go down over time

 

700km done with 3.8l/100km. 3-4 petrol pips left. I stop to pay attention to mpg and I am driving normaly. It looks like I do not have that patiency and traffic conditions to keep best driving behaviour for 1 month of driving and keeping it under 3.5l/100km. Still I am looking forward to see, how much more km left and how much liters I will be able to put in to my petrol tank on my next petrol visit.

 

I just managed to complete a 700-mile tank an would like to join the club:

• A picture of your HSI display with the required number of miles
• 
  
• A description of your techniques (doesn't have to be exhaustive) and conditions: 4 legs with different techniques and conditions
• Toledo-->Chicago (May 20): Tailwind from East. Construction zones slowed traffic on the Ohio and Indiana turnpikes to about 50 mph while slowest lane in the other sections was about 65 mph.
• Chicago-->Burlington (May 22): Tailwind from South and used Route 41 North to Wisconsin and then Wisconsin 50 , 75, and 20 to keep speeds well under 50 mph.
• Burlington--> I 80 (May 24 morning) Winds calm. Used Wisconsin 20 and 75 to US 83 South to I 290 to Tri-State Tollway to I 80. Lots of stoplights and small towns kept the highway speeds well under 50 mph, and congestion slowed the interstate sections to the low 60s
• I 80 --> Cleveland (May 24 afternoon): Winds picked up from the West, again giving a good tailwind, and moderately heavy volume plus all the construction zones kept slow-lane speeds between 55 and 65 mph.
• Time of year: May 20-24, 2016, warm late Spring weather just cool enough in the Chicago area that we did not have to run the AC until the final leg on I 80 when temps reached the 80s.
• 
  
• How long you ran on the blinking low-fuel warning light: Was hip deep in alligators while in those construction zones coping with the bloody trucks much of the afternoon, so did not pay attention to when that happened.

HUZZAH !!

(FWIW: I filled up with 10.9 gallons , which gave a calculated mpg of 66 mpg compared to the displayed 69 mpg on the HSI display. That's a normal discrepancy as the HSI displayed mpg is usually 2-3 over my calculated mpg.)

 

That is remarkable result for 50 MPH average speed.

 

Wohoo, congratulation. That is excelent. 50mph looks like quite sweet spot for ICE consumption.

 

Wow...that is truly a feat! I've driven Cleveland to Chicago once and I can't imagine getting that kind of mileage in those areas. Big congratulations, you deserve it.

 

I'm running Michelin Energy Savers at 44psi, had a 4-wheel alignment done recently (Bob Wilson's influence), and have constructed a lower total grill block (with openable plexiglass "doors") that I think helps both lessen the "cold start" penalty and possibly reduces the aero drag of the nose. But the Leg 1 and Leg 4 tailwinds were about 10-15 mph (based on the flags we passed en route) and they were key to the result as I usually have headwinds traveling westward and cannot get the same efficiency.

Peeto: Bob Wilson has published data clearly showing that SLOWER than 50 mph is better for higher mpg. The true maximum mpg for a Gen III seems to be about 15-20 mph based on his graph. I was balancing the 50-55 mph sections on the slowest lane of a congested interstate with the 30-35 small town and country highway sections.

 

Anything below 40mph is mpg killer for me. So the slower you go, the worst mpg I get. Anything over app 40mph starts to help, my sweet spot for best mpg is app at 48-50mph - 2011gen3 prius . I am just over 1000km with 1 tank, on 17wheels and mostly ac on these hot days here, with 4liters petrol left in tank. Still quite good.

 

" The true maximum mpg for a Gen III seems to be about 15-20 mph based on his graph. " - maybe he meant average mph per 1 full tank spent and not actual one? This can make more sense.

 

Once again are your michelins 15" ? Still at average 50mph per full tank, its hell of a high speed for that tank and great consumption! /I was speaking before for actual speed, not average, so there was my misunderstanding/

 

Yes, the Michelin Energy Savers are the standard P195/65 R15, although Costco is not stocking them any more. With wife in car, I cannot take back roads and drive as slowly as I would like to.
She did, however, tolerate an experiment on the Colonial Parkway between Jamestown and Yorktown, Virginia, which is mostly flat and has 3 lanes, no stop signs or stoplights, and no minimum speed limit. I found that driving a constant 25-35 mph (cruise control) would yield somewhere around 80 mpg. Thus my experience is that Bob Wilson's graph is correct and average speeds lower than 50 give higher mpg. Good luck for you with this tank!

 

thank you, I will post some screens later on.... would do that 700miles, but I does not have balls to drive so much on last petrol pip
I have nearest town, where we do our trips regularly only 12km far, which killed my mpg to 62 only. When I do longer trips, even 77mpg is quite regular /but I have this trips like 10% of my full tank, app 50km trips/ - will post pcs in evening. see u

 

3.5liters left in tank, I will do that 100km quite easily on top to hit 700miles, but I am not so brave without canister of some gas in car so no club for me this time. and here is proof of continous trip from dolny kubin to zilina with consumtion just 3.0 l/ 100km - 50km one. /average speed is much higher, so my mpg is also much higher than with only 41km/h in previous scr./

 

I had 735 miles on my last tank but resetted before I could take a picture. . Filled 10 gallons. Mostly daytime driving in warm weather. 60% freeway with heavy traffic.

 

very nice still, what was the driving technique and usual trips length, please? I must be missing something, because I do not know how to get this high mpg with so low mph. ty

 

I admit I am puzzled by your result of getting better mpg at 50kph than at 41kph, although both are fairly slow when converted to miles per hour, so the difference may lie in how well the tank is fueled each time as that can fluctuate at least by 1/2 a gallon (2 liters) in my experience unless you are very careful.
Bob Wilson once recommended using the Trip B odometer to run test sections where you would either drive the same exact loop with the cruise control set at different speeds, or do a back-and-forth segment of some rural highway at different set speeds. That's boring but would provide some concrete evidence for you to work with and to show us.
Cheers!