800+ mile tank conquered

As I noted on the top 20 mpg thread I was thinking of trying for 800 mile tank this time around but my first 150 miles were on the interstate at higher speeds and poor economy. I should have gotten off an refilled and reset my meter but anyways I did not and kept going. Fast forward to today on my way into work I crossed the 800 mile mark on the tank.

The 0 miles till empty came on at 740. My mpg was 72.9 at that point. I decided to keep going, put a can of gas in the back just in case and ended up at 73.2 average. 27 mph average. 801.8 miles.

I had a couple goals this fuel economy season (yes summer is what I call fuel economy season) 1 was to do an 80 mpg plus round trip commute to work. I passed that with 83.4 mpg. 24.6 miles.
Second goal was an 800 mile tank. I knew I would have to push it and it came easier than I thought being I thought I would need to be 75-76 mpg avg.

So here is the picture since I did not see an 800 mile club thread I made my own entry. Thanks for all the endless tips and suggestions I have read in many threads. I will probably never know what it's like to hit 900 or 1000 and I am amazed at that. And I am really amazed on the 99.9 mpg distances some people have put up as well. You guys and gals are tops and these cars are really amazing.

Oh yeah 2011 Prius II, oem goodyears around 50 psi. 19xxx miles on the car.

 

Environmental conditions I am in Indiana and the weather has been about 55 degrees to about 97 degrees.

Not sure what physical conditions mean but most roads are not much elevation change, pretty flat with gradual inclines or declines.

Thanks I will post in the 800 mile club

 

Ok I will try to answer all the little stuff

I am not a huge scientific person and I know some are.

I filled up last for this tank on 6/19 in Batesville Indiana the shell station. Should be e10 87 octane gasoline. Last nights fill up 7/25 was at speedway in noblesville Indiana. 87 octane e10.
When I fill my tank I let it stop at the first click, then I try to add .8-1.0 gallons. Yesterday before leaving work I added my 1 gallon from the can, drove 8 miles to the gas station and added 9.8 gallons to the first click. So the 1 gallon - the 9.8 still had maybe 1.3 gallons of fuel left when I hit 800?
The first 150 miles were highway cruise control set at 77 in the 70 mph zone. After that the remaining miles were mostly commute miles which my commute is 24.6-26 miles depending on which road I choose to drive home. I drive most of the route on a 4 lane road which is 45 mph in part of it and 40 on the rest.
I have a scan gauge II and monitor FWT, IGN, MPG, RPM
I use pulse and glide as much as possible pulsing to posted limit or 3 or and gliding back down to a reasonable speed typically 35 in a 40 but many times higher like 37 cause it is a main drag from my side (north side) of town to Indianapolis in the morning and reverse on the way home.
I try to use some of the battery power when I am getting towards the end of my route because the car will sit 9-10 hours and have to go through warm ups again anyways taking some of the power from the battery as is.
I try to time all the round a bouts or rotaries as some may call them, there are not a ton of stop lights on my route makes for nice driving.
No engine block heater, my car is in a garage and its been summer/spring weather all tank. Temp range from approx 55-97 degrees F
Stock Goodyear fuel max tires size P195/65r15, checked pressure in the right front when I looked to verify size it was 47.5 psi.

Hopefully this will help any more specifics, I would be happy to try to answer. I see some other prius on the road on my daily commute, wave if you read this ! I am the one in the silver gen iii going slower in the right lane lol

Matt