Best MPG?

I do a lot of driving on the highway. I was wondering what speed everyone was going to get the best MPG?

I got 26.7MPG once going about 70-80 from LA to SD

70ish seems to be best for me. I get best if I adjust my speed with the terrain. Slow a bit up hill and speed up down hill.

 

Oh, and I average about 2 mpg better with a catless downpipe and stage 2 tune than stock dp/tune.

i had my digital readout saying 30.5 for the first 100 miles of my last fillup. i filled up and got right on the interstate and ran 65.

I did a 1300 Km (808Miles) trip a while back in the summer...drove at night at around 120-130 khp (75-80 mph) almost all the way on cruise,,,,,, 31 mpg actual calculated (Imperial gallons) Gotta love long runs on cruise;)

I'm getting about 25-26 on the highway and going between 65-70 depending on where on the road I am.

Driving from Boulder to Santa Fe (relatively flat, all highway) I set the cruise control on 70 and got 32 mpg (calculated, not the overly optimistic computer display)

Through the passes on I70 between Denver and Grand Junction I got 28.2 calculated at fill up. My readout was at 28.6. Pretty close... Speeds ranged between 60 and 75.

keep in mind, the best mpg will never happen during winter

I do a lot of driving on the highway. I was wondering what speed everyone was going to get the best MPG?

 

Duh, 55 foolio.

 

70ish seems to be best for me.

 

Of course 70 is not going to be the best mileage. One of the biggest factors in highway mileage is WIND RESISTANCE.

 

70 is merely the point where you feel that more speed is too much of a diminishing return. Also, driving 55 on the freeway/highway will cause accidents

For 5eat going 65 I can get about 28mpg fwy some hilly parts but I think overall its slight downhill (60+miles). Drops down to like 24mpg going 75/76.

 

In Cali going down the Cajon Pass I can get 34mpg going 75:)

I just recorded 31.2 in my spec B on a trip from Denver to Breckenridge and back. Pretty surprised about that.

LA to Vegas around 26mpg going 75-90 but mainly 75-80

Anywhere from 65-80, you will earn 26-31mpg's on hwy. Gas stations make a big difference too. I noticed with texaco and chevron, I was able to go 20-35miles more before having to fill up again. I conducted a 3 month test on Bp, 76, texaco, chevron, shell, and Mobile. Texaco and Chevron lasted longer with a 20-40 mi extended life, however you did have to pay a small bit more per gallon. but yea ha

Best I've achieved for a tankful was an indicated 27.7 mpg, which turned out to be 26 mpg actual. I typically drive 75-80 mph, so that's pretty good for those speeds. Worst I've ever gotten was around 17 mpg indicated, 16 actual. Normal range is around 18 - 19 mpg city and 22 - 25 mpg highway.

You couldn't be more wrong. 55mph may perhaps be the most efficient speed for cars say 20 yrs ago when speed limits were first instituted but that's not true for cars of today. Case in point, my other car gets the best gas mileage at 80mph. Tested this multiple times on the same stretch of highway, same day, same temps and conditions and 55mph was consistently much much lower. Altho your 2nd blurb bout wind resistance holds true.

 

Disappointingly enough, my LGT gets worse gas mileage than my higher HP car

 

Duh, 55 foolio.

 

 

 

Of course 70 is not going to be the best mileage. One of the biggest factors in highway mileage is WIND RESISTANCE.

 

70 is merely the point where you feel that more speed is too much of a diminishing return. Also, driving 55 on the freeway/highway will cause accidents

Best EVER for an actual sustained drive (>100 mi)

 

27 from digital readout, cruising ~65 in NC in the summer from W-S to the beach, car was less than a year old.

 

I have been averaging 24.6 digital readout, 24 calculated, over the past couple months since I started my new job (80 mile roundtrip commute)

 

 

Disappointingly enough, my LGT gets worse gas mileage than my higher HP car

 

Yes but factor in the cost difference (from new) and how long would it take you to "save" money

 

 

 

<---- my 700th post woot woot

My best in my 08 spec.B (stage 2) was going to Boston which is an hour and 1/2 one way I got 26.5 MPG with cruise control on.

stg1 right now, I get 22-26mpg on a normal daily drive.

Stg 2 summer fuel 75% highway = 26mpg manually calculated

Stg 2 winter fuel going snowboarding and back best = 22.5 MPG. Winter gas sucks

im jealous to all of you...

 

im only getting 15 on the street and on the hwy is 18...20 if lucky. my car is not even that modded....spt intake and infamous Stage 1...is there anything i need to be concern about besides pain in my pocket?

Some says that Stage 1 is causing the worst mileage and that Stage 2 makes it better.

I've been averaging about 26.5 between my two homes in Savannah Georgia and Orlando, FL.. +100k mi, stock engine.. averaging around 70-75 mph.. though I4 and I95 are mainly flat so that helps the fuel mileage.

Remember that for a single tank, math based on a fillup isn't any more accurate than the mpg display.

The number of gallons pumped is accurate, but some pumps will cut off with a more or less full tank, which can vary by like a gallon, than others.

 

As for the, i get better MPGs at certain gas stations, I call BS. Gasoline is a fungble commodity and the same truck dumping fuel in the Shell is probably dumping fuel in the Texaco across the street.

there can be some exceptions, some stations will get winter gas before the other based on how much is consumed. When new gasoline regulations are upcoming, certain refineries may implement the change before another.

There will also be differences between locations, certain states or cities will mandate certain formulas.

However, the idea that when one brand name slaps its name and a tiny additive pack (like a few cups for a tanker full) makes it instantly more efficient is incorrect.

 

Oh and ~29mpg@65.

I say all gasoline are pretty much the same except for the ethanol junk.

 

Remember that for a single tank, math based on a fillup isn't any more accurate than the mpg display.

The number of gallons pumped is accurate, but some pumps will cut off with a more or less full tank, which can vary by like a gallon, than others.

 

As for the, i get better MPGs at certain gas stations, I call BS. Gasoline is a fungble commodity and the same truck dumping fuel in the Shell is probably dumping fuel in the Texaco across the street.

there can be some exceptions, some stations will get winter gas before the other based on how much is consumed. When new gasoline regulations are upcoming, certain refineries may implement the change before another.

There will also be differences between locations, certain states or cities will mandate certain formulas.

However, the idea that when one brand name slaps its name and a tiny additive pack (like a few cups for a tanker full) makes it instantly more efficient is incorrect.

 

Oh and ~29mpg@65.