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Old 04-22-2011, 11:48 AM
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Default 1989 s10 with 4.3l engine. MPG?

I have been reading about the 4.3 in my truck and according to everything i've read it says 28 freeway 21 city. anyone confirm this or have other numbers? I am trying to figure this out.
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Old 04-22-2011, 08:03 PM
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lol BRAND NEW it probably came close to those numbers..
i know my old 4.3L got worse gas mileage than my old V8 sonoma
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Old 04-22-2011, 11:56 PM
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80 miles ( 60 of it was at 60 mph, the other 20 35 mph) i used 1/8th of a tank. i only have 120k on the motor with fresh tune up, has routine maintenance done on it. so it shouuld be about close to that right? even closer now with a complete new exhaust system
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Old 04-23-2011, 06:00 AM
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might be close, but im not so sure it will pull 28mpg on the highway

give it a try! thats the best way i never pay much attention
myself

and my old 4.3L (1991) had around 180k miles on it
and mileage got worse when i set it on 31s
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Old 04-23-2011, 09:41 AM
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I have a 91 5-speed, and I only get 19mpg average. I don't think any 20 year old engine outside a motorcycle is going to get 28. The government's website (http://www.fueleconomy.gov) says that a manual tranny gets 24 highway, and even that is generous.
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Old 04-23-2011, 10:34 AM
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all i really know is that my fuel gauge works and it barely moves at all on long trips. in town its not the greatest but freeway its great fuel mileage.
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Old 06-29-2011, 03:29 PM
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well i have 281k but runs like a champ, good compression, good vacuum, no smoke all checks fine like its been rebuild

im getting AROUDN 15 city 19 highway, my last adverage was like 18mpg

i get roughly 270-280 miles outa the 16 gallon tank if i remember corectly
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Yup and hauling it in a trailer and dumping it on ur shitty ass lawn

You little asshole
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Old 01-06-2012, 09:46 PM
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Default 1991 2.5 gas mileage

I was interested to find out what kind of mileage I would get with my newly purchased 1991 2.5 with a 5 speed showing 206,000 miles.

After filling my second tank of gas showed I got 24.3 mpg. This was mixed city and highway driving.

I'm happy as can be since my goal is to have a work truck that gets decent gas mileage.

Ken
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Old 01-07-2012, 08:16 AM
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i only avg 20mpg with my 2.5 liter
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Old 01-09-2012, 12:09 PM
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Cool

got 320 on first full tank in my 88 gmc s15 then a backfire becouse of bad gas never been tht good ever again even with pushing cimicails into it i get avage 20-23 mixed on highway i get 26-28 if im just barly have any foot on it but tht would be me geting ran over lol so 2.8 v6 not to bad get around 240 with gas saver 271 but damn i mise tht 320 on a v6 killer it
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