Calculated the mileage. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

thirdstreettito · 04-19-2010, 09:40 PM

Well, we drove to Wilmington yesterday in the burb and filled it up when we got there. Then drove back doing 75-85 in Cruise. Came back and filled it back up, calculated gallons+miles. 22MPG! #7500 4x4 27 y/o Suburban getting 22mpg. Awesome.

USSkoval · 04-19-2010, 10:10 PM

Wow, I almost got 13 once

geod919 · 04-19-2010, 11:00 PM

With my leaky carb, I get 8.1. Yay!

87chevy.com · 04-19-2010, 11:09 PM

sounds like your speedo is incorrect. If your speedo is correct, im sure, almost positive GM would be putting that technology in all of their trucks and suv's. With my speedo calibrated to the tires and rear gear... 5.3, 4L60, 3.42rear gear,tuned for gas mileage 5600# on the sticker, cruising at 75 from houston to florida I think I might have seen 21... in my opinion, no way is your suburban getting that kinda mileage.... unless your running a low compression engine with turbo(s)...
clint

redneckchevy · 04-20-2010, 01:08 AM

I have a 86 C-10 with a 350 and i am geting 9.1... Man i need a new tranny haha

D13 · 04-20-2010, 06:26 AM

Did you miss the sig line on having a 6.2 diesel?

1987 R10 6.2 700R4 3.08's
I get 22+MPG all the time, 24-25 with mixed city/rural/highway driving, I bet I would get 27 if I only drove at 55mph with no stops. The 6.2 makes lousy power but is very efficient 1800-2500RPM.

The key is the diesel, GM doesn't put this in trucks because we all wanted 400hp instead of 195HP and great MPG. And now they have to add EGR and soot traps which kills you. And while turbos pump up the power they also increase fuel needs dramatically.

My 5400# 5.3 4l60E cab and a half 99 3/4 ton gets 15-17. My 72 402/375hp 1 ton Longhorn got 9.5. My 90 454SS got 9.5.

thirdstreettito · 04-20-2010, 07:42 AM

Quote:

Originally Posted by 87chevy.com

sounds like your speedo is incorrect. If your speedo is correct, im sure, almost positive GM would be putting that technology in all of their trucks and suv's. With my speedo calibrated to the tires and rear gear... 5.3, 4L60, 3.42rear gear,tuned for gas mileage 5600# on the sticker, cruising at 75 from houston to florida I think I might have seen 21... in my opinion, no way is your suburban getting that kinda mileage.... unless your running a low compression engine with turbo(s)...
clint

Quote:

Originally Posted by D13

Did you miss the sig line on having a 6.2 diesel?

1987 R10 6.2 700R4 3.08's
I get 22+MPG all the time, 24-25 with mixed city/rural/highway driving, I bet I would get 27 if I only drove at 55mph with no stops. The 6.2 makes lousy power but is very efficient 1800-2500RPM.

The key is the diesel, GM doesn't put this in trucks because we all wanted 400hp instead of 195HP and great MPG. And now they have to add EGR and soot traps which kills you. And while turbos pump up the power they also increase fuel needs dramatically.

My 5400# 5.3 4l60E cab and a half 99 3/4 ton gets 15-17. My 72 402/375hp 1 ton Longhorn got 9.5. My 90 454SS got 9.5.

BOOYAH! lol

87chevy.com · 04-20-2010, 08:46 AM

yeah i did miss that... i did see the 3.73 though... well good job on the mileage.. well alteast i was on to the right track on the low compression and turbo part... lol

**N2TRUX** · 04-20-2010, 09:50 AM

Quote:

Originally Posted by 87chevy.com

yeah i did miss that..... lol

Don't feel bad, I did the same thing. I was about to throw the BS flag then remembered he had a diesel.

thirdstreettito · 04-20-2010, 12:01 PM

Quote:

Originally Posted by 87chevy.com

yeah i did miss that... i did see the 3.73 though... well good job on the mileage.. well alteast i was on to the right track on the low compression and turbo part... lol

23.5:1 is low? lol

okieraptor · 04-20-2010, 12:43 PM

Nice numbers. I hope to see that in mine. I doubt I will as the smallest tires ill run will be 35's but will gear it right. I should get around 18 from what I've seen.

Throw some pics up of the Burb.

thirdstreettito · 04-20-2010, 03:42 PM

No pics. When I get it detailed next, I'll take some pics. Rare paint scheme too.

87chevy.com · 04-20-2010, 10:16 PM

dam, haha im laughing at myself you said diesel and i still thought of a gaser... haha, now that you said the high compression , im like :doh:... im just gona stop replying to your thread.... it will work out better that way

04-19-2010, 09:40 PM	#1
thirdstreettito Resident of Here Join Date: May 2008 Location: Wesley Chapel, FL, USA Posts: 7,716	Calculated the mileage. Well, we drove to Wilmington yesterday in the burb and filled it up when we got there. Then drove back doing 75-85 in Cruise. Came back and filled it back up, calculated gallons+miles. 22MPG! #7500 4x4 27 y/o Suburban getting 22mpg. Awesome. __________________ ~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck

04-19-2010, 10:10 PM	#2
USSkoval Registered User Join Date: Jul 2009 Location: West Jefferson, OH Posts: 999	Re: Calculated the mileage. Wow, I almost got 13 once __________________ -Andy '77 K5 Blazer '78 K10 Shortbed '78 C20 Suburban '79 K30 Crew Cab Dually '84 C10 Short Stepside '88 K20 Suburban

04-19-2010, 11:00 PM	#3
geod919 Registered User Join Date: Mar 2010 Location: Independence, ky Posts: 39	Re: Calculated the mileage. With my leaky carb, I get 8.1. Yay!

04-19-2010, 11:09 PM	#4
87chevy.com BMW & ASE Master Certified Join Date: Feb 2004 Location: Houston, Texas Posts: 1,266	Re: Calculated the mileage. sounds like your speedo is incorrect. If your speedo is correct, im sure, almost positive GM would be putting that technology in all of their trucks and suv's. With my speedo calibrated to the tires and rear gear... 5.3, 4L60, 3.42rear gear,tuned for gas mileage 5600# on the sticker, cruising at 75 from houston to florida I think I might have seen 21... in my opinion, no way is your suburban getting that kinda mileage.... unless your running a low compression engine with turbo(s)... clint __________________ 1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes 1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD A poor man buy's it twice finally got my domain name back, 87chevy.com.... site rework in progress

04-20-2010, 01:08 AM	#5
redneckchevy Registered User Join Date: Feb 2010 Location: Tony, WI Posts: 69	Re: Calculated the mileage. I have a 86 C-10 with a 350 and i am geting 9.1... Man i need a new tranny haha

04-20-2010, 06:26 AM	#6
D13 Registered User Join Date: Feb 2007 Location: Memphis MI Posts: 1,851	Re: Calculated the mileage. Did you miss the sig line on having a 6.2 diesel? 1987 R10 6.2 700R4 3.08's I get 22+MPG all the time, 24-25 with mixed city/rural/highway driving, I bet I would get 27 if I only drove at 55mph with no stops. The 6.2 makes lousy power but is very efficient 1800-2500RPM. The key is the diesel, GM doesn't put this in trucks because we all wanted 400hp instead of 195HP and great MPG. And now they have to add EGR and soot traps which kills you. And while turbos pump up the power they also increase fuel needs dramatically. My 5400# 5.3 4l60E cab and a half 99 3/4 ton gets 15-17. My 72 402/375hp 1 ton Longhorn got 9.5. My 90 454SS got 9.5. __________________ 1987 2 ton 1982 250/TH350 beater in progress Dad's 1981 3/4 L6 3 on tree posi and no options, awaiting restoration or scrapping Plus a mess o' tractors

04-20-2010, 08:46 AM	#8
87chevy.com BMW & ASE Master Certified Join Date: Feb 2004 Location: Houston, Texas Posts: 1,266	Re: Calculated the mileage. yeah i did miss that... i did see the 3.73 though... well good job on the mileage.. well alteast i was on to the right track on the low compression and turbo part... lol __________________ 1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes 1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD A poor man buy's it twice finally got my domain name back, 87chevy.com.... site rework in progress

04-20-2010, 12:43 PM	#11
okieraptor Registered User Join Date: Mar 2010 Location: northern texas, southern oklahoma Posts: 144	Re: Calculated the mileage. Nice numbers. I hope to see that in mine. I doubt I will as the smallest tires ill run will be 35's but will gear it right. I should get around 18 from what I've seen. Throw some pics up of the Burb.

04-20-2010, 03:42 PM	#12
thirdstreettito Resident of Here Join Date: May 2008 Location: Wesley Chapel, FL, USA Posts: 7,716	Re: Calculated the mileage. No pics. When I get it detailed next, I'll take some pics. Rare paint scheme too. __________________ ~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck

04-20-2010, 10:16 PM	#13
87chevy.com BMW & ASE Master Certified Join Date: Feb 2004 Location: Houston, Texas Posts: 1,266	Re: Calculated the mileage. dam, haha im laughing at myself you said diesel and i still thought of a gaser... haha, now that you said the high compression , im like :doh:... im just gona stop replying to your thread.... it will work out better that way __________________ 1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes 1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD A poor man buy's it twice finally got my domain name back, 87chevy.com.... site rework in progress



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