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Discussion Starter #1
I just filled up my truck after 300 miles of combined city/country driving.
It took a tad over 11 gallons of diesel. Works out to slightly better than 27 mpg.

:cool2:

That's the first time I really figured my fuel economy (and I do mean ECONOMY), so I don't know whether it's been like that or what. I was running standard #2 with a small bottle of el cheapo supermarket brand fuel additive.

Is there something wrong with the truck or something? It's getting better fuel economy than my dad's 1.6L powered Ford Escort! :eek:
 

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Maybe your math?;)):h

Keep checking it. Who knows?


Lucky Bass-Turd:ro)
 

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I seen a '92 6.2L 1/2 ton 4x4 and paper in window from dealer said up to 27mpgs normal was 18-21
 

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I just filled up my truck after 300 miles of combined city/country driving.
It took a tad over 11 gallons of diesel. Works out to slightly better than 27 mpg.

:cool2:

That's the first time I really figured my fuel economy (and I do mean ECONOMY), so I don't know whether it's been like that or what. I was running standard #2 with a small bottle of el cheapo supermarket brand fuel additive.

Is there something wrong with the truck or something? It's getting better fuel economy than my dad's 1.6L powered Ford Escort! :eek:
Once when I thought I was getting astronomical mileage on my truck, I didn't really fill it all the way. My truck seems to foam quite a bit when filling and will shut off most pumps with room for another 2.5 gallons. Now I make sure I fill it all the way to the neck and can see the fuel for consistency.
 

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I think dh515 nailed it. I doubt the tank was truly full. I expect this tank will be below average mpg since your probably starting off with a tank this isn't quite full.
 

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have you compared odo with hwy mileage posts or gps. hope worked out right tho.
 

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Discussion Starter #8 (Edited)
Actually, believe it or not, I overfilled this tank. It’s full right into the filler pipe!

Must be the hubcaps...
:duh: Of course! Why didn’t I think of that!
:rotflmao:

have you compared odo with hwy mileage posts or gps.
I haven't made a point of it, but in general checks it seems to be correct.


ON EDIT: My 200th post!
 

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Happy 200th! I'm on my 935th. Sooner or later I bound to answer something right.
 

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diesel fuel does foam when pumped. best to gently rock the truck when filling.;)

highsierra, what gears do you have in the rear? that contributes to it alot. if you have a 6.2 with 3.08 and good driving habits I would not be surprised at that figure.

dieselpro, lets hope that comes sooner rather then later!
 

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Ive seen high 20's in a 1987 1/2 Suburban, 2 wheel drive, 3:08's, 700R4, doing the speed limit......So I think its possible.
 

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6/2's get far better mileage than the 6.5's. The first 6.2's in 82 got fabulous mileage. We had a 82 9 pass 1/2ton 2wd Sub that religiously got 32 mpg highway with the air on (lived in Vegas at the time), and got 29 mpg city. Loaded with 8 Boy Scouts, a driver, and all their stuff for a week of hiking, it still got 30 mpg on a 2,000 mile trip. Had it for a few years and over 100,000 miles and it still produced great mpg. Only problem ever had with it was one injection pump going bad, which was rebuilt with the new stainless sleeves and never failed again. Probably would still have it except oldest son ran it off the road and into a culvert tearing off the rear axle assembly. Should have rebuilt it. Also had a 84 Blazer 6.2 4wd which has gone over 800,000 miles without a engine rebuild (sold it to a friend who drove it 15 years 200 miles a day round trip to work) that always produced about 28 mpg. 6.2 was gutless, but with the right equipment produced fabulous mpg.
 

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Discussion Starter #13
highsierra, what gears do you have in the rear? that contributes to it a lot. if you have a 6.2 with 3.08 and good driving habits I would not be surprised at that figure.
I have 3.42 gears. Of course, I have the overdrive 700r4.

I guess I do have good driving habits (don't we all?). I don't drive real fast or anything, and I generally accelerate pretty slow. I've never actually had the truck at wide open throttle (believe it or not). I don't tend to leave the truck idling for long periods of time, that might help boost things a bit.

I guess I'll have to watch this next tank carefully and see what kind of mileage I get out of it. Of course, I don't want to run out of diesel again... My fuel gauge still doesn't work.
 

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Bornready, my old 84 G20 van, 6.2 with a manual 4sp over drive, don't know the final ratio, probably 3.42 or 3.08, got 23.5 year in and out. One trip to St. Paul and back to eastern Iowa it got 26.5. But on that trip I had a lot of time and drove the speed limit. I usually drove it 70+. Mike
 

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So that's why you are called Slomoe?):h):h :ro)
 

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Back in the '80's, at the dealership, the customers used to come in and brag about their Jimmy K-5's getting over 25 mpg. I've heard as high as 28 with the standard package, whaever that was, 6.2, 700R4, don't know what gear or tire size. These were '82 -85 models.

Seemed quite common, contrary to the gas engines we sold. Those guys came back complaining they only go 14 - 19 mpg on average. Sounds right to me, my '81 K-5 350 gas engine only gets 16 hiway. My '84 Suburban, 6.2, 700R4 does over 20 hiway.
 

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It can happen.

When I drive my 93 slowly I can get up to 30 (Canadian) MPG. If I get in a hurry it drops quite a bit.

Gerald
 

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Thats about right for a 6.2 I know the 2wd blazers from the mid 80's were pulling high 20's. It was rediculous you could go over 700 miles on a tank of diesel. I don't know if my bladder could do 700 miles but the Blazers could.

But you also have to take into consideration they werent powerhoses or anything, 140 HP and I don't remember the TQ but I think it was right around 300.
 

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I drove a 3/4 ton 4x4 that I might buy and that thing had balls. Theys used to pull 20,000 lbs with it and replaced it with a ford 1 ton with a 400ci gasser and said the chevy 6.2 pulled that trailer just as good as the ford.
 

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My brother had an 82 Blazer, with the 700R4, and 3.08 gears. It has well over 100k on it when he got it. He took it on a trip to Virginia Beach from NY, and claims to have gotten 32 mpg with it!

I average about 18 in mine, but thats without trying. I also think my IP is getting tired, truck has just over 100k on it, and I am betting its the original pump.
 
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