fuel injected MPG? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Prerunner1982 · 03-13-2006, 01:42 PM

just wondering what is considered good mpg for an 87, 1/2ton, longbed, 2wd, 305, 700r4...

wifes 87 GMC is getting between 16-17 consistantly, worst was 15.. this is all city driving.. i feel this is pretty decent as the 92 maxima she had was only rated at 19mpg city and i know it was getting less than that..

Russell · 03-13-2006, 02:25 PM

16 - 17 in town sounds right on the button

Most of the time you arn't in OD in town, so it acts like a regular three speed, unless your 700r4 locks up in third.

Prerunner1982 · 03-13-2006, 02:55 PM

at what speed is OD suppose to kick in? On the roads between town and home the speed limit is 45.. and hilly.. the hills would bog down the OD and it would have to kick into 3rd. I keep it in Drive now, so it doesnt bog down.. still gets 16-17mpg.

Russell · 03-13-2006, 07:15 PM

It shouldn't be in lockup below 45 mph, and even then, thats a bit too early with some of the earlier TBI engines. Chances are it isn't kicking back out of OD, but rather, its just unlocking the torque converter. I typically do the same as you though, take it into drive if it is constantly locking and unlocking on me.

**Captkaos** · 03-14-2006, 07:10 PM

My '87 gets around 16-18 in what I consider city driving. When I drove to Orlando last year when I had it for only about a month it got 22mpg.

jbon64 · 03-14-2006, 07:18 PM

93 gmc , same specs , i get about 18 highway , and usually 15 in town . weird thing is i tow a ditch witch trencher occasionally and the in town doesnt change a bit

03-13-2006, 01:42 PM	#1
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,906	fuel injected MPG? just wondering what is considered good mpg for an 87, 1/2ton, longbed, 2wd, 305, 700r4... wifes 87 GMC is getting between 16-17 consistantly, worst was 15.. this is all city driving.. i feel this is pretty decent as the 92 maxima she had was only rated at 19mpg city and i know it was getting less than that.. __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

03-13-2006, 02:25 PM	#2
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Re: fuel injected MPG? 16 - 17 in town sounds right on the button Most of the time you arn't in OD in town, so it acts like a regular three speed, unless your 700r4 locks up in third. __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

03-13-2006, 02:55 PM	#3
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,906	Re: fuel injected MPG? at what speed is OD suppose to kick in? On the roads between town and home the speed limit is 45.. and hilly.. the hills would bog down the OD and it would have to kick into 3rd. I keep it in Drive now, so it doesnt bog down.. still gets 16-17mpg.

03-13-2006, 07:15 PM	#4
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Re: fuel injected MPG? It shouldn't be in lockup below 45 mph, and even then, thats a bit too early with some of the earlier TBI engines. Chances are it isn't kicking back out of OD, but rather, its just unlocking the torque converter. I typically do the same as you though, take it into drive if it is constantly locking and unlocking on me. __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

03-14-2006, 07:10 PM	#5
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Re: fuel injected MPG? My '87 gets around 16-18 in what I consider city driving. When I drove to Orlando last year when I had it for only about a month it got 22mpg. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

03-14-2006, 07:18 PM	#6
jbon64 Registered User Join Date: Jan 2006 Location: sidney , illinois Posts: 312	Re: fuel injected MPG? 93 gmc , same specs , i get about 18 highway , and usually 15 in town . weird thing is i tow a ditch witch trencher occasionally and the in town doesnt change a bit __________________ hey.....smell my finger 64 nova wagon , 63 nova convertible



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