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Author Topic: Miles on the Highway Back to Topics
Doo
Rookie Author
Miami

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Message Posted: Apr 22, 2012 12:49:23 AM

I know depending on how fast you drive can impact your mpg. When driving a vehicle such as a mazda mini van, what's an average speed to drive on the highway to get good miles to the gallon?
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GrumpyCat
Champion Author Alabama

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Message Posted: May 12, 2014 1:35:10 PM

"With overdrive and cruise control, the speed limit."

Mazda mini van? No way. High wind load will put best MPG in the 35-50 MPH range. Unsafe speed for highway use.
dassfg
Champion Author Fort Worth

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Message Posted: May 12, 2014 7:54:50 AM

Find the sweet spot in the torque curve (a tach helps) and do your best to stay there
MertieMan
Champion Author Lexington

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Message Posted: May 12, 2014 5:01:19 AM

With overdrive and cruise control, the speed limit.
dgsteven
Champion Author Los Angeles

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Message Posted: May 12, 2014 3:10:43 AM

65 per day
Vin63
Champion Author San Bernardino

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Message Posted: May 7, 2014 11:01:39 AM

The only way to find out is to do some incremental speed tests and record your results.
cv
Champion Author Raleigh

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Message Posted: May 4, 2014 12:08:07 AM

Mine seems to be around 60mph.
jes
Champion Author Pennsylvania

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Message Posted: May 3, 2014 8:50:16 AM

RPM's are a better indicator. Around 2000 RPM's or less gives me good mileage. Of course it all depends on the vehicle. 2000 rpm in my wife's Malibu and 2000 rpm in my Aveo are about 15 - 20 mph different from each other.
Bus936
Champion Author Lexington

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Message Posted: May 1, 2014 5:05:27 AM

I drive about 40-50 per day.
MPSAN2
Champion Author Tennessee

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Message Posted: May 1, 2014 1:27:18 AM

70 PER DAY
Sugarshaneo7
Veteran Author Michigan

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Message Posted: Apr 30, 2014 11:16:17 PM

71
Seamus4513
Champion Author Orange County

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Message Posted: Jun 17, 2012 9:21:30 AM

Every vehicle has its optimal speed for economy. Gotta find it. Mine is 60,
Z12
Champion Author Toledo

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Message Posted: Jun 16, 2012 8:25:45 PM

The speed limit
ChisJ
Rookie Author Philadelphia

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Message Posted: Jun 16, 2012 1:53:05 PM

I got better fuel mpg since i open up the air flow for better fuel/air mix and even up the car front and back curb weight.
tattoo666TX
Champion Author Texas

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Message Posted: Jun 16, 2012 1:16:53 PM

The best possible mileage that any vehicle will get is with it in the highest gear and lowest possible rpms without trying to downshift.
MertieMan
Champion Author Lexington

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Message Posted: Jun 16, 2012 8:51:11 AM

If it has overdrive and cruise control, then drive the speed limit. That is what overdrive is for in the first place.
PatAZ
Champion Author Tucson

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Message Posted: Jun 15, 2012 10:18:25 PM

Just don't poke along and impede traffic.
DeonNC
Rookie Author North Carolina

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Message Posted: Jun 9, 2012 7:00:17 AM

It's always good to drive the speed limit for better traffic flow and fuel economy
hnofer17
Champion Author Austin

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Message Posted: Jun 8, 2012 11:11:52 PM

55
Z12
Champion Author Toledo

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Message Posted: Jun 8, 2012 9:15:46 PM

Posted speed limit
vikings80
All-Star Author South Dakota

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Message Posted: Jun 8, 2012 4:07:31 PM

speed limit
kenji554
Champion Author Charlotte

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Message Posted: Apr 29, 2012 8:46:13 AM

I just stay close to the speed limit.
kxy4fw
Champion Author Denver

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Message Posted: Apr 29, 2012 8:03:44 AM

Fuel economy or safety??? Best to drive around the speed limit.
the1roadhog
Champion Author Atlanta

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Message Posted: Apr 29, 2012 7:47:53 AM

The slower the better.
clytzepp
Rookie Author Cleveland

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Message Posted: Apr 28, 2012 10:23:28 PM

High way I think 55-60mph
W707
Champion Author Pennsylvania

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Message Posted: Apr 28, 2012 9:11:06 PM

i drive my Dodge van around 60 to 65mph
rick_evans
Champion Author Boston

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Message Posted: Apr 28, 2012 4:27:59 PM

varies car to car.
fatfed
Champion Author San Antonio

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Message Posted: Apr 28, 2012 8:21:29 AM

Drive @ 60 mph for best milage
MertieMan
Champion Author Lexington

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Message Posted: Apr 28, 2012 8:02:40 AM

With overdrive and cruise control, drive the speed limit.
diesdown
Champion Author North Carolina

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Message Posted: Apr 27, 2012 12:21:34 PM

Guestimate of 60-65 for that vehicle.
ProfDude
Champion Author Illinois

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Message Posted: Apr 27, 2012 5:53:25 AM

True that the answer will vary by vehicle and other conditions, and that the best way to learn this is probably through personal experience.

It still would be nice if manufacturers published a cruising speed, indicating the most fuel efficient speed in a particular gear or the like.

Perhaps there are valid reasons why they cannot or should not do this.
PCollen
Sophomore Author Florida

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Message Posted: Apr 25, 2012 8:07:43 PM

I commute 50 miles each way to work and back, all interstate. I set the cruise on 70, get in the middle lane, and let the rest of the traffic go by (if they want, and most do). I get 38-40 mpg in my 2001 Honda Civic EX Coupe w/5-speed, and it has almost 350,000 miles on it. I don't use any special oil, fuel treatment, or anything. Just regular routine maintenance and keep the tires properly inflated, and the engine oil and filter changed on schedule.
jonjon57
Champion Author Raleigh

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Message Posted: Apr 25, 2012 8:19:47 AM

30 mpg
Millers37
Champion Author Michigan

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Message Posted: Apr 25, 2012 1:56:14 AM

'02 GMC Sierra 2500HD Duramax Diesel 69MPH - 21MPG
Z12
Champion Author Toledo

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Message Posted: Apr 24, 2012 8:14:55 PM

Probably 30mpg
timmyC4
Veteran Author Twin Cities

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Message Posted: Apr 23, 2012 5:02:02 PM

96 Passat TDI Sedan.
On straight Freeway driving,
63-65 mph = 55mpg (65 zone)
70-72mph = 51mpg (65 zone)
I did 75-77mph going to Milwaukee once (300 miles) and got 48mpg.
All with cruise on, no A/C on

I have a 5% bigger diameter (not width) tires so I calculate that into account. Factory is 195-60-14, I installed 195-60-15's

Depends on how much of a hurry I'm in.
All around, with lots of City driving, I get about 42mpg.
This is Spring/Summer/Fall.
Winter, you can take about 5-10% off those #'s
fondupot
Sophomore Author Illinois

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Message Posted: Apr 23, 2012 4:44:10 PM

My Kia Optima turbo gets GREAT mileage on the highway. Even at excess of 70 mph. At 80mph I managed 35mpg. At 70 I can manage 37
Jkent1953
Champion Author Salt Lake City

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Message Posted: Apr 23, 2012 3:00:57 PM

I have found 65 gets me the best mileage. I use cruise control unless there are hills. Going up a hill sends rpm through the roof.
Gas_Buddy
Champion Author Maryland

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Message Posted: Apr 23, 2012 12:43:18 PM

There is no one "average speed that gets good fuel economy". First, the obvious answer, is to see if your owner's manual offers any suggestions. Second, ask your question in any one of several "Mazda discussion forums", such as they have Gas Buddy (otherwise you'll get a lot of answers such as "Buy something else...", or "I drive a Chrysler mini-van and I get...").

For the most part, traditionally most people get good fuel economy in the 50-55 mile per hour range; obviously some vehicles may get better fuel economy at a slightly higher (or lower) speed range, but the general rule of thumb is that as you increase speed, your fuel economy lowers. If you don't like the answers you're getting, experiment and keep accurate fuel logs until you decide what's best for you and your car.
steben11
Veteran Author Montreal

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Message Posted: Apr 23, 2012 11:18:48 AM

put the crus control and set our speed around 60 mph
WEPSMAN
Champion Author South Dakota

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Message Posted: Apr 22, 2012 9:12:29 PM

Lower RPM's usually mean better mileage. What the average speed is, I do not have a good answer.
OceanArcher
Champion Author Mississippi

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Message Posted: Apr 22, 2012 6:20:48 PM

If conditions warrant, I'd set the cruise control to 65, and stay in the right lane
MertieMan
Champion Author Lexington

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Message Posted: Apr 22, 2012 7:29:40 AM

If it has overdrive and cruise control, then drive it the speed limit.
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