: Instantaneous MPG 28 @ 70MPH, RPM 1900



cbloveday
04-24-10, 08:30 AM
For those naysayers who doubted my highway mileage is above 25, I snapped this pic with my blackberry. I apologize for the poor quality.

I switched on cruise control to 70 mph
I put the transmission in tour
I had instantneous MPG in DIC window.

The instantaneous was 28mpg. :thumbsup:

We won't talk about spirited driving gas mileage. :(


http://i183.photobucket.com/albums/x99/cbloveday_bucket/MPG70.jpg

CIWS
04-24-10, 08:41 AM
But that doesn't mean your car will actually get 28mpg. That number can be affected by the incline of the road and several other factors.

cbloveday
04-24-10, 08:45 AM
But that doesn't mean your car will actually get 28mpg. That number can be affected by the incline of the road and several other factors.

I understand, it vasilated between 25mpg & 29mpg, depending on highway grade. I still believe this is higher than stock. :suspect:

Perhaps someone with a bone stock car can confirm their instantneous and rpm at this speed.

sefa01
04-24-10, 08:55 AM
Yes, anyone can get that on instantaneous (especially on a downhill grade). But show us a pic of the average MPG.

cbloveday
04-24-10, 09:01 AM
The ground was level when I took the pic. Nevermind, you guys just marshed my mellow.

CIWS
04-24-10, 09:25 AM
I can alter my instantaneous reading by 6-10 mpg just by adjusting my foot ever so slightly up or down as it rests on the peddle cruising down the road.

JFJr
04-24-10, 09:26 AM
Also, wind speed and direction can affect mpg. Is your car bone stock? The best average mpg I get with my run-flat tires at 2100 rpm is approximately 21. If you are truly experiencing mid-to-upper 20's average mpg at 1900 rpm, congratulations, you have an exceptional car.

neuronbob
04-24-10, 10:05 AM
I can alter my instantaneous reading by 6-10 mpg just by adjusting my foot ever so slightly up or down as it rests on the peddle cruising down the road.

Exactly. The instantaneous numbers are there mostly for the entertainment value, frankly.

Not trying to harsh anyone's mellow, just the truth. I can get 70 mpg in my car when coasting downhill with my foot nearly off the throttle, but when I average out my mileage over each individual tank, it's still in the 14-15 range.

cbloveday
04-24-10, 10:30 AM
You guys are really not getting my point here. Can you put your cruise control on 70 and have your instantaneous be 28mpg for any "extended" length of time (say 20 miles) and your rpm be 1,800 to 1,900? Do most people have their rpm at 2,000 or 2,100?

demorgan59
04-24-10, 10:30 AM
I'm driving to New York in 3 weeks. I'll know all about mileage by the time I get back. Anything over 20 mpg average would be unreal considering the HP that my car produces.

cbloveday
04-24-10, 10:33 AM
I'm driving to New York in 3 weeks. I'll know all about mileage by the time I get back. Anything over 20 mpg average would be unreal considering the HP that my car produces.

Thank you David. That is what i want to confirm or deny. Clear it to 0.00
once on the highway and drive @ 70mph for a while and see what your avg. is.:thumbsup:

Tony407
04-24-10, 03:04 PM
Sorry, I just don't get it. The instantaneous mpg really is a useless comparison, even if you're getting a consistent reading for several minutes at at time.

I'll buy you a new marsh mellow if you want. I applaud your enthusiasm.

Tony

cbloveday
04-24-10, 03:38 PM
Toneloc,

Appreciate it!

cts-v ls6
04-24-10, 03:55 PM
Guys,

Don with D&D Transmission makes a gear set for the 6 speed cars that changes the final drive ratio to the same as the V1 cars,(.62:1), giving you 70 mph at 2000 rpm. Price is $416 and they're in stock. This would really help highway mileage and only affect 6th gear.

Jack

neuronbob
04-24-10, 04:51 PM
Thank you David. That is what i want to confirm or deny. Clear it to 0.00
once on the highway and drive @ 70mph for a while and see what your avg. is.:thumbsup:

This I can help with. :thumbsup:

I just drove to Toronto 12 days ago. It's a flat route around Lakes Erie and Ontario, destination 292 miles from my house in the Cleveland area.

No cruise control used. Had myself, wife, luggage in the car. A/C on. Cruising speed was 80 mph with occasional bursts to 90 in BFE (US only, held it to 120 kph on the QEW in Ontario). 18.4 mpg to Toronto, 18.3 mpg back. This is with the "max" W4M tune and no other mods outside of my Corsa exhaust. If I'd driven 65 mph all the way, I'm sure I would have gotten over 20 mpg. I wanted to experiment in that way, but I just....couldn't....do it.....

BTW....dang is gas expensive in Canada! I will never complain about gas prices in the US again.

CoOlSlY
04-24-10, 06:53 PM
! I will never complain about gas prices in the US again.

Went to the US yesterday, 3$ a gallon compared to here in Québec at 4.50$ a gallon... In Europe, it's even higher but they are paid more than we are ;)

CoOlSlY
04-24-10, 06:57 PM
Btw, I can only manage 10-11mpg so far, wondering if it's normal... On the highway, at 70mph, instant is at 13mpg... Almost always in the city at ~30-40mph with "normal" start (4-4500rpm) but my best so far is 13mpg on average, only 600 miles on the clock so maybe it will get better (?)

mpouls1
04-24-10, 07:26 PM
I would never go that fast. It is above the speed limit. :tisk:

GMX322V S/C
04-24-10, 07:52 PM
With the Wait4Me Max tune, I'd get an indicated 22 MPG over the same sections of level ground I got an indicated 20 MPG stock. With my current dyno tune (CAT), I get and indicated 21-22 MPG over those same sections. Jesse has posted in the past that he was getting like 26 highway MPG in one of his built cars.

demorgan59
04-24-10, 08:46 PM
This I can help with. :thumbsup:

I just drove to Toronto 12 days ago. It's a flat route around Lakes Erie and Ontario, destination 292 miles from my house in the Cleveland area.

No cruise control used. Had myself, wife, luggage in the car. A/C on. Cruising speed was 80 mph with occasional bursts to 90 in BFE (US only, held it to 120 kph on the QEW in Ontario). 18.4 mpg to Toronto, 18.3 mpg back. This is with the "max" W4M tune and no other mods outside of my Corsa exhaust. If I'd driven 65 mph all the way, I'm sure I would have gotten over 20 mpg. I wanted to experiment in that way, but I just....couldn't....do it.....

BTW....dang is gas expensive in Canada! I will never complain about gas prices in the US again.
Just give it time - you will.

UnsafeAtAnySpd
04-24-10, 09:04 PM
Damn. I get over 28 mpg actual on the highway sometimes. ...but that's with a lowly V1... :D

CIWS
04-25-10, 08:17 AM
I would never go that fast. It is above the speed limit. :tisk:

The most respected Albert Einstein has said the speed limit is 186,000 miles per second, and I've never even gotten close to exceeding the speed limit. :D

neuronbob
04-25-10, 06:22 PM
^^^^^^

lol!

dvandentop
04-25-10, 09:08 PM
shit idk if i have even seen above 20 on mine, maybe i need a tune :D

fastv
04-25-10, 10:00 PM
Went to the US yesterday, 3$ a gallon compared to here in Québec at 4.50$ a gallon... In Europe, it's even higher but they are paid more than we are ;)

That sucks dude. I thought we had it bad. $4.50 is highway robbery! :eek:

Cub Cadet
04-26-10, 02:51 PM
Exactly. The instantaneous numbers are there mostly for the entertainment value, frankly.

Not trying to harsh anyone's mellow, just the truth. I can get 70 mpg in my car when coasting downhill with my foot nearly off the throttle, but when I average out my mileage over each individual tank, it's still in the 14-15 range.

Yikes!! I still manage 21mpg with mixed city and highway. However, here is my experience with my driving...
I drive from near the Akron, OH area to the Columbus, OH area each Monday morning and it is 109 miles. I fill up at the gas station right by the freeway, reset all the fuel mileage displays and let it rip down the freeway with the cruise locked at 69mph. At that pace, I can get the average fuel economy right close to 22mpg. Instantaneous is a garbage number and is not worth even looking at - it means nothing. Anyhow, once I start getting into the evening commute home with stop and go traffic, I get back down into the 19.3 region. However, once I get back on the freeway for the 109 mile trip back north, the mpg improves back up to 20.8 - 20.9 mpg. Also, be advise that this is the warmth weather number... once it gets below 40 degrees, mileage drops off 1-2mpg. I have been doing this drive each week for 7 months now, and only 3 months now with the CTS-V.
Honestly, my particular car - 100% stock, 6spd - can maintain 21mpg in the warm weather and I am happy about that.

whisler151
04-26-10, 04:55 PM
I would never go that fast. It is above the speed limit. :tisk:

Not in DFW. Most tollways are 70mph.