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Fuel economy survey


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Posted

Whatchoo guys getting out of what engines? How have your mods affected this? What's your stock rating?

 

what's MY stock fuel economy rating? (3.1) :lol:

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  • Robby1870

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Posted

stock rating is 19 city 29 highway. I get on the highway at 70-75 mph at least 33mpg

 

Robby

Posted

Yeah... long trips on the prairies, flat as a board for hundreds of kms, I've gotten up to 35 or 36 with the cruise on. I'm impressed at how well the fuel economy has held up with age.

 

No such luck here in da valley's. Average about 24.

Posted

this weekend, appx 800 miles, i averaged 28mpg. 640 of that was highway driving, rest was stop and go city. 3.4dohc, automatic, no converter lockup

Posted

I was getting around 28-31mpg in my 93 SE w/ the 3.1 MPFI w/ conical intake and open exhaust(one muffler, no cat, and piping out the back)...I think my mpg dropped when I got the exhaust done, but that was probably due to me driving harder to hear the exhaust 8) My 01 GTP(stock w/ the exception of a K&N drop-in filter and 3.4'' pulley), I'm getting 27.4mpg highway/granny driving, went up about 1.5mpg(was around 26.2mpg) after I did a recent tune up and changed the SC oil.

Posted

Delivering pizzas I get about 14 on a good week after a plug change. I was getting 16 driving like an idiot, until I changed my front three plugs, didn't notice a diff. in power but lost 3 mpg/gal I am still looking for those 3. One thing I noticed, when I pulled the old plugs out, they were gapped @ ~.060 - .070 That would explain a slight loss in MPG and the reason I had to replace my IGN module. :)

Posted

well I don't know how to figure out your crazy American measureing system :lol:

 

But as an example I filled my tank for $40 and Got 625KM from it.

 

I say thats pretty good for a 3.8L with 255,000km on it.

Posted

With the 90 3.1 (117k on the clock)

30mpg Highway...I average around 410 miles to the tank. :D

 

With the 90 Turbo 3.1 (95k on the clock)

No clue....I drove it home from milwaukee on 1 tank of 2+ year old gas, so I know it gets at least 150 miles to the tank. :lol:

 

With the 99 GT 3.8

Around 27mpg average...I average 400 miles to the tank

Posted

Mostly highway hi-speed cruising-a good steady 23 MPG. Going 70 MPH, turning about 2200 RPM.

 

93 Olds DOHC Ragtop

Guest TurboSedan
Posted
Delivering pizzas I get about 14 on a good week after a plug change. I was getting 16 driving like an idiot, until I changed my front three plugs, didn't notice a diff. in power but lost 3 mpg/gal I am still looking for those 3. One thing I noticed, when I pulled the old plugs out, they were gapped @ ~.060 - .070 That would explain a slight loss in MPG and the reason I had to replace my IGN module. :)

 

wow that sux! when i deliver pizza i get about 17mpg driving like mad, no mods to engine, 209,000 miles and running good besides a clogged cat converter. i used to get about 21 before the converter got clogged and back when my car had an automatic transmission. highway MPG with the 5-speed i have gotten a best of 34mpg with the cruise on @ 75mph in 5th (turning about 2700 RPM). with the auto i got a best of 29 or so hwy. i can't remember what the 4T60 did for RPM @ 75mph in OD.....?

 

i think if i changed the cat (as in test pipe), and gave it some GM top engine cleaner, i would probably see an increase to 20mpg delivering pizza (mad city driving) and 35 hwy.

joshua

Posted

I get anywheres from 22 to 28 depending on city/highway mix and how fast I drive (usually pretty fast). I've got the Series 1 3800 with no mods. I think it's EPA rated at 19/29. I'm pretty happy with the fuel mileage so far considering my previous car was getting about 12 mpg.

Guest Anonymous
Posted

I average around 28 mpg on the highway with the TGP. I have gotten as much as 34 mpg and as little as 4 mpg. :shock: :lol: :twisted:

Posted

i get around 19 to as high as 25 on my 95 Grand Prix SE with 55,000 miles, not sure why it is regularly so low, I don't drive toooo much like an idiot :D

Posted
well I don't know how to figure out your crazy American measureing system :lol:

 

You guys are the ones with the crazy system :lol: Don't you know the U.S. is always right :lol:

Guest Anonymous
Posted
4mpg?? What were you doing towing a house??

 

Robby

 

That 4 mpg was only for a short distance. My foot was stuck to the floor... :wink: :twisted:

Posted
well I don't know how to figure out your crazy American measureing system :lol:

 

But as an example I filled my tank for $40 and Got 625KM from it.

 

I say thats pretty good for a 3.8L with 255,000km on it.

 

holy shit wtf is wrong with me then? i put in $40 TWO DAYS AGO and drive not more than 300KMS and i need to fill er up again! and this is a 3.1 running stock rite now!!! I HAVE to find out wtf is goin on with my car......any suggestions?

Guest RedCutlassSL
Posted

40 dollars!!!! I can fill my tank full for about 24 bucks

Posted
40 dollars!!!! I can fill my tank full for about 24 bucks

 

40 bux canadian

Posted
4mpg?? What were you doing towing a house??

 

Robby

 

That 4 mpg was only for a short distance. My foot was stuck to the floor... :wink: :twisted:

 

Yeah, tha would def. yeild 4mpg. Im assuming that was on the TGP. One tank that I had I drove all in town and raced a lot. I think I got 10-12mpg

 

Robby

Posted

While we're on the whole gas / mileage topic. What's gas (plain ol' 87) worth around your neck of the woods?

 

Right now it just went up here to 79.9 (piss me off) from 76.9... had been 61.9 for most of last year... (that's a litre, for all you down south boyz) :wink:

Posted

Well, Ima down south boy, and here 87 is $1.44 for a gallon, which is 3.78 liters, IIRC

 

Robby

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