My best MPG so far...

[Cosworth]

So, driving back from OH to MI (300 miles) I was able to get 49.4 mpg.

The driving condition was ideal, IMO. Flat terrain, not much traffic, cross-wind for only about 75 miles of the journey.

Speed: 68-75 mph (using cruise)
Distance: 306.2 mi
Fuel: 6.201 gallons
psi: 29 front & 29 rear (yeah, it was low)
Tire: oem w/ ~27k miles
AC: on for ~ 2hours
Temp: 85 at start --> 65 at end
Mods: none
Load: driver only
Stops: 1 for dinner

I only wish I had a SGII to tryout hang-time pulse-n-glide.

-SC

p.s. After this wonderful achievement my gf drove the car in 30/70 (city/hwy) setting... and got only 33mpg. WTF!

[Kal-El]

Wow, especially considering your speed of 68-75. Over 55 really effects gas mileage with exponential drag.

[Loren]

You got 49 mpg with the cruise control at over 70 mph? That's pretty impressive. Must have had a tail wind for some of it.

[Cosworth]

Yeah, I will have to try to replicate it to see if it was a fluke (gas pump letting up early) or not. (I did check the fill-up by squeezing the pump 3 times, until the auto shut-off came on three times...)

I tried to "glide" when there was even a slightest incline on the road and back up to cruising speed once the road flattened out (or declined).

FYI - in my 1.6L 5spd Civic hatch, I usually average 40-42 mpg on 5/95 (city/hwy) at 65-70 mph (no cruise, pulse-n-glide, no SGII).

[Loren]

Okay, if you were doing some gliding, it makes more sense. Usually, when people say they were using cruise control... it means they had it locked in and doing its thing. (which keeps speed fairly constant, but is not the most economical)

[supmet]

My guess is the "flat terrain" was an extremely slight downgrade, otherwise there is no way to get 49 MPG doing 68-75 with 29 pounds in the tires. Even without using the A/C I'd be surprised if you could get 35 mpg under those conditions.

[Loren]

Keep in mind that as you get that close to 50, every tenth of a gallon equals about 1 mpg. So, overfilling at the beginning by a tenth, and underfilling by a tenth at the end (purely by differences in fuel pumps) could easily have you off by 2, maybe even 3 mpg.

But, even 46 is pretty high mpg for that kind of speed.

[firemachine69]

No kidding.


I was impressed with my recent 35mpg, and I haven't gone over 60mph, with lots of hypermiling.

[Cosworth]

I think one factor that leads to my high mpg in my cars (Yaris S -5spd & Civic 1.6 5spd) is that my usual driving environment is in rural areas. Let's just say that I only need to pass 4 signal lights before I'm on the freeway.

Once I'm up to speed, it really doesn't take that much gas to motivate the car at 65-75 mph cruising speed. I've lived in big cities before, and let's just say that my "city" driving is actually more like a rural backroads for most of you. :P

Lastly, if you've never been to rural MI, when I say the roads are flat... they are really flat & straight. I can say this because, I've lived in the NE, Pac NW, SE and now MidWest... flat as in pancake flat... not rolling hill like in KY.

[b_hickman11]

I still dont understand why people dont believe other people pn their mpgs.....I can get 44 mpg with AC on 3, cruise on 70, 32 psi, and 100 degrees outside.

[scape]

b/c they're unbelievable ;o

[Loren]

Now, see... you guys are talking about 40-44 mpg at 70. That's pretty high, but not unreasonable. To get 49+ at speeds GREATER than 70... that takes some special circumstances.

The Yaris really doesn't like to deliver more than 48 mpg above 60 mph.

[supmet]

Originally Posted by voodoo22

I'd guess it's because they cannot open their closed minds to understand that the driving environment, cars setup and drivers style strongly affect FE.

For example, If I drove 70 mph with cruise and a/c on in my environment I'd get around 40 MPG and I would guess you're getting those extra MPGs on me because of the temp in TX vs ON. It's very rarely 100 here.

lol - closed minds? More like working minds, that don't just accept every piece of information on the internet as fact, and without question.

70 mph with proper psi getting 40 mpg is a quite a bit different than 75 mph with low psi and getting 50 mpg

[Pitt Yaris]

Originally Posted by b_hickman11

I still dont understand why people dont believe other people pn their mpgs.....I can get 44 mpg with AC on 3, cruise on 70, 32 psi, and 100 degrees outside.

That is insane. I drive smart, never use my a/c and usually go 50-60 mph and have only got up to 41mpg.

[b_hickman11]

Originally Posted by Pitt Yaris

That is insane. I drive smart, never use my a/c and usually go 50-60 mph and have only got up to 41mpg.

Thats because you live in the Northeast....

[jamal1984]

Originally Posted by Cosworth

So, driving back from OH to MI (300 miles) I was able to get 49.4 mpg.

The driving condition was ideal, IMO. Flat terrain, not much traffic, cross-wind for only about 75 miles of the journey.

Speed: 68-75 mph (using cruise)
Distance: 306.2 mi
Fuel: 6.201 gallons
psi: 29 front & 29 rear (yeah, it was low)
Tire: oem w/ ~27k miles
AC: on for ~ 2hours
Temp: 85 at start --> 65 at end
Mods: none
Load: driver only
Stops: 1 for dinner

I only wish I had a SGII to tryout hang-time pulse-n-glide.

-SC

p.s. After this wonderful achievement my gf drove the car in 30/70 (city/hwy) setting... and got only 33mpg. WTF!

i believed you, i did hit 55mpg over 70mph once. Now my average is about 37-39mpg which is 70-80mph on highway 70% hw and about 30% City driving.
Last week i took my yaris to myrtle beach from Buford GA to Myrtle Beach SC is 350miles trip, the road are flat terrain, hardly any traffics.
1. I left around 5pm filled up the whole tank, i drove by myself from GA to SC with 1 big bag in the back seat, and my laptop bag messenger with 12" sub woofer in the trunk plus cooler, clothes.....so basically it's pack. I did use CRUISE at average of 60-78mph never pass 80mph, i stop at the gas station when it's hit 300miles on my car to fill up my gas again and i did 37mpg average.
2. On the way back from SC to GA myself with all the bags, cooler..... plus 2 more persons and their bags. i have to say that i did 80-90mph on my way back just want to get home soon and followed the traffics, it's was daytime.
I was surprised that i got 41mpg when i filled up my gas today. No lie or bs here. I think it's more about about weather, gas brands, your foot, Traffics.....that make a big dfferences in MPG.

[Woody_Woodchuck]

I concur, to get anywhere near 50 mpg driving over 60 mph means that there are additional circumstances like tailwind or down hill slope. I’m not shooting down the poster, just stating what I have learned by experience. If I have a 5 mph headwind, going 55 mph I lose 3 to 4 mpg for that section (15 highway miles) of my commute. If there is a tailwind I can gain that 3 or 4 mpg!

Also, to folks who are trying to get good mileage and are falling short even though they drive 55 mph or under… accelerate slooooower. The Yaris, at least my 5-speed, will eat up the gas if you accelerate with a heavy foot. Heck, anything less than feather foot will drop the mileage big time. Go slow and steady, shifting just before you hit the power point of the next gear. It is going to take you longer than you might like to get up to speed but works. Same with accelerating on the open road, use a light foot and slooooowly get to your speed. Of course with other traffic you have to trade fuel efficiency for not pissing other folks off. If other vehicles are far enough behind me I’ll take it slow, if there is traffic I’ll accelerate faster but not quite as fast as most others.

[RedStickHam]

I've been driving my Yaris for a little over 3 months and am getting around 31MPG, the lowest I've had is 28, while the highest was around 34.

My driving is all city driving, most a 13 mile stop/go commute to work. I was getting the higher mileages back in February and March when the weather was cooler, but the hot/humid south Louisiana summer is here, so A/C is a necessity, and of course the mileage has dropped.

My Yaris is a 2009 5spd with 15inch wheels.

RedStickHam