My best MPG yet!

Well, I just got home to log my MPG's into Fuelly, and am excited to say that I just reached my highest MPG level of 67.4 MPG, over the course of 521.0 miles!

I have about 8k miles on the C3 so far, I love the little car. I'm in college so it's the perfect go to work-school-home type of car.

The reason this tank was almost 10mpg better than my last was because I tried using E0 fuel. That's right, ethanol free gasoline. I am fortunate to have a gas station that sells it "for recreation" although it is at 90 octane, which is a bit higher than the recommended 87 octane fuel. Is this hurting anything?

I don't have a scangauge, but I use the screen that tracks your battery level (on the far right it shows your instant MPG consumption). I use that instead of the scangauge, and on the smaller screen at the top, I use the ECOscore screen.

More or less I wanted to see what the thoughts were on using 90 octane fuel.. Using pure gas is a bit more expensive ($4.19/gal when regular grade is currently at $3.60/gal in my area). The extra cost and extra MPG's almost seem to cancel each other out.. I am not done with my testing yet as I plan to fuel up 3 or 4 times in order to develop a solid pattern before I decide which I should stay with. In the meantime, am I hurting my engine using a 90 octane fuel?
Thanks for your thoughts!

MPG Mobile (Toyota Prius C) | Fuelly

 

You know, I thought the same thing initially.. But filling up my tank is still only around $30 give or take a few..(Today's fillup was $33 and some change). I quickly saw that "expensive gas" really doesn't mean all that much when you only get 8 gallons at a time! I will be sure to keep everyone here posted, I myself am curious to see which is the better route in the long run!

 

99.9 MPG huh? Wowza. How'd you manage that one? My battery won't last that long! Haha. Thanks for crunching the numbers for me. It's a pretty great little car!

 

I tend to disagree. While driving slower may result in better MPG's the average speed doesn't really seem very accurate to me. It's considering sitting at a red light a speed of zero, and so on. So far this tank looks pretty promising. 74.5MPG indicated, average speed of 26MPH. My commute is 30MPH in my neighborhood, 40MPH to the highway which is 55MPH, then 40MPH to work, and my average speed is somewhere in the mid 20's. I think it's because of stops.. We will see though.

 

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I'm hoping that my current tank will beat my previous best. I don't think the spike in milage is just the E0 fuel, I think it's a combination of things. I've put on window visors which seem to have helped reduce wind inside by a TON (I only ride with the windows down and less wind inside means less drag on the car). I've also been becoming very efficient at using my battery to its fullest potential (I used to keep throttle at the highest point to maintain speed, and have now learned that it drains the battery quicker for literally no speed gain..) Things like that on top of coasting as far back as reasonable with traffic have been working to my advantage. I'm excited to see if I make the top 20 list!

 

Another great tank, even better than my last. Check it out!

Another really cool screen that I didn't know the car could display is below. It's for your best 3 tanks, and it shows where your current tank ranks compared to all fillups in the cars history. It's turned off by default, which can easily be changed. Pretty nifty I think!

 

Very cool. I am loving my Prius C. Take a peek at my MPG's on the drive home from work. This was taken just 20 minutes ago. It's one of my better commutes. Mid 70's are not uncommon since I've improved my personal technique for my commute to/from work and school.

 

My drives home from work are my best. It's not uncommon for me to get high 70's/low 80's. Even here in Florida, the elevation varies more than you'd think. Where I work is 30ft higher than home, which I think helps boost it. Not to mention, it's warm here right now (warm to say the LEAST.. 98 out right now) so the warm up cycle is quicker and my engine is more efficient than in the mornings when its only 80 out.. LOL