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Dr.Fiero View Drop Down
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Points: 1726 		Direct Link To This Post Topic: Actual mileage chart
    Posted: 04 May 2008 at 3:51pm
Ok - I'm going to try something.

If you could post just the following:
Vehicle description (V6, 5spd, stock - or 4cyl, 4spd, turbo - just the basics though)
Exact mileage (kilometerage?!) elapsed
Exact fuel used (like, 32.04 liters etc).

Try to always fill up the same way (for example, I always go until it auto shuts off, then do a light squeeze ONE more time until it auto shuts off), then remember to reset your trip meter. 
Then NEXT fill up, note your K's used on the trip meter, and the amount shown on the gas slip. 

Post it all up here. I guess this will just be a combined highway/city chart to keep things simple.  Maybe note if you did 100% highway or something, so as not to skew the results TOO far.

I'm going to make up a spreadsheet showing all this, and I'll post it up as I get them with the updates.
Values will be based on there being 1.61 km's per mile, and 3.78 liters per gallon (yeah, it's US, but that's what all the original EPA etc specs were based on).


US Government EPA chart says:
86 Pontiac Fiero
6 cyl, 2.8 L, Manual 4-spd, Regular 		17 24
88 Pontiac Fiero
6 cyl, 2.8 L, Manual 5-spd, Regular 		15 25
87 Pontiac Fiero
6 cyl, 2.8 L, Automatic 3-spd, Regular 		16 22
86 Pontiac Fiero
6 cyl, 2.8 L, Automatic 3-spd, Regular 		16 23
87 Pontiac Fiero
4 cyl, 2.5 L, Manual 5-spd, Regular 		22 32
99 Pontiac Grand Prix
6 cyl, 3.8 L, Automatic 4-spd, Premium 		16 25


Nobody has posted for an '87 duke yet, just tossed it in to rub in the mileage...  

  ** Chart is now data sorted by lowest to highest mileage! **


Member Year Engine Trans Elapsed Fuel used Mileage
Dr.Fiero 86 2.8 4spd 190 26.12 17.08
Dr.Fiero 86 2.8 4spd 197 26.64 17.36
Bassman 86 2.8 4spd 215 28.38 17.79
Marcel 86 2.8 Auto 245 31.97 17.99
Bassman 86 2.8 4spd 246 31.85 18.14
Dr.Fiero 86 2.8 4spd 212 26.92 18.49
Dr.Fiero 86 2.8 4spd 152 19.22 18.57
Dr.Fiero 86 2.8 4spd 198 24.90 18.67
Austin 86 3.4 5spd 295 36.80 18.82
Marcel 86 2.8 Auto 229 27.48 19.57
Marcel 86 2.8 Auto 229 27.48 19.57
Bassman 86 2.8 4spd 221 25.86 20.06
Marcel 86 2.8 Auto 246 28.12 20.54
Graeme 88 2.8 5spd 280 30.50 21.55
Marcel 86 2.8 Auto 224 23.94 21.97
Capt.Fiero 88 2.8 5spd 334 32.60 24.05







*** Highway only





Marcel 86 2.8 Auto 226 23.55 22.53
Capt.Fiero 88 2.8 5spd 232 22.68 24.02
Blair 99 3.8SC 5spd 229 21.92 24.52
Dr.Fiero 86 2.8 4spd 232 22.13 24.62



Edited by Dr.Fiero
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Bassman View Drop Down
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Sir Brian

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Points: 2501 		Direct Link To This Post Posted: 04 May 2008 at 8:55pm

'86 Fastback GT, Engine 3.2

Fuel used: 31.847   

Mileage: 246

Km/lt. Average: 7.72 km

I think that's correct km per lt...ouch I say, Ouch!.  Let's see how it works out as adjusted the timing with David today.  And from the adjustments made before this tank, was very happy to reached the 246km on a tank based on past I was lucky to have reached 200km for city driving, and I had a few lines before empty to go.



Edited by Bassman
Brian (Bassman)

86 GT Fastback 3.2L

2013 Mazda3 Sport GS SkyActive

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Sir Brian

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Points: 2501 		Direct Link To This Post Posted: 18 May 2008 at 12:36pm

Ok, last nights fill up:

215km, 28.376 lt. = 7.58km per lt...still a HUGE OUCH!...lol...let's see if the new plugs help, and I don't want to hear that I paid too much for the NKG's...lol, you know who I am refering too:)...I'll be the test dummy then:)
Brian (Bassman)

86 GT Fastback 3.2L

2013 Mazda3 Sport GS SkyActive

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Sir Brian

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Points: 2501 		Direct Link To This Post Posted: 18 May 2008 at 8:49pm

Another fill up (think I been out cruizin or something with the nice weather:)).

221.4km, 25.863lt (gas was cheap on the way home) = 8.56km per lt:)...I gained almost 1km per lt with the new plugs...hmmm:), let's see what the next tank does.  I also am certainly not taking it easy, heavy foot:)
Brian (Bassman)

86 GT Fastback 3.2L

2013 Mazda3 Sport GS SkyActive

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Points: 284 		Direct Link To This Post Posted: 30 May 2008 at 10:55pm

V6 auto, stock, and tired 391,000kms

last fill 31.97ltr

245kms

Marcel




Edited by Dr.Fiero
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Graeme View Drop Down
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Points: 249 		Direct Link To This Post Posted: 31 May 2008 at 12:17am
I filled up just under 31 litres and was at 280km.

88GT with 127,000k on the engine. 5spd.
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Points: 1726 		Direct Link To This Post Posted: 01 June 2008 at 9:03am
On our upcoming trip down south...  this would be a PERFECT time for everyone to do a near total highway mileage reading.

If everyone fills up at the Chevron in Blaine (everyone resets there trip meter), we simply head down there, turn around and come back - then refill at Chevron again.  Note your trip meter and liters used.

I'll post a separate sheet for the pure highway mileages.

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Points: 284 		Direct Link To This Post Posted: 01 June 2008 at 11:00pm

just filled up first tank after distributor rebuild on the 86 se v6 auto

246.6 kms on 28.119ltrs

Marcel
Marcel 86SE V6 Auto
85SE V6 Auto
85 2m4
soon to be sleeper 3.8sc 5 speed
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Points: 4039 		Direct Link To This Post Posted: 02 June 2008 at 4:01pm

334kms on 32.6 liters of fuel.  Mostly spirited hwy driving. (120-160kph)

88GT 2.8 V6 5spd.

 

$44 to fill up, OUCH that stings.
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88 Fiero GT 5spd V6
Eight Fifty Seven GT V8 5spd.
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Points: 284 		Direct Link To This Post Posted: 07 June 2008 at 11:28pm

arlington run, highway only: chevron to chevron on 87 octane

my odometer read 225.6kms on 6.23 us gallons and $26.43 us

86 2.8v6 3spd auto

Marcel
Marcel 86SE V6 Auto
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Points: 284 		Direct Link To This Post Posted: 07 June 2008 at 11:32pm
My tires are a bit oversize at 225r50-16  which would explain different oddometer readings, dr fiero at 232 and me at 225.
Marcel 86SE V6 Auto
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soon to be sleeper 3.8sc 5 speed
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Points: 4039 		Direct Link To This Post Posted: 08 June 2008 at 4:26pm
Total of 6.0 gallons, 232kms.  Mind you that was driving with a loaded trailer behind the car, spending a fair bit of time over 140kph.  The trip down had a great deal of "drive really fast, pull over take pics as the group approached, then let them pass and drive really fast to catch back up again"   Had I of been empty and driving like a sain man, I would expected to have used about 4.5 gallons.  Pure highway runs, I can usually pull about 450-500kms from a tank of fuel.
Capt Fiero
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Eight Fifty Seven GT V8 5spd.
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Points: 250 		Direct Link To This Post Posted: 08 June 2008 at 6:00pm

Originally posted by Dr.Fiero Dr.Fiero wrote:

Blair!  Post up!  And make note of what your engine came from (99 Bonneville?)

The engine is a supercharged 3800 series 2 from a 99 Grand Prix GTP.

 I did 5.8 us gallons of premium fuel for the round trip to Arlington with throttle play here and there.

dr. fiero edit: since I had no mileage, I stabbed in the dark at 229km's.  Sounded like a good number.  :)



Edited by Dr.Fiero
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Austin View Drop Down
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Points: 195 		Direct Link To This Post Posted: 18 June 2008 at 12:23am

Adding to the list, I just filled up yesterday:

~295km, 36.8L mostly highway

This will probably be the most highway my car sees.  It normally doesn't see any highway mileage in my normal driving so it'll be back down after this.



Edited by Austin

1986 Fiero GT 3.4L V6 DIS, 5 spd, Full Polyurethane Suspension, Rear Coil-overs
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Points: 284 		Direct Link To This Post Posted: 19 June 2008 at 12:07am

228.9kms, 27.48ltrs combined city/hwy

my 86 v6 auto
Marcel 86SE V6 Auto
85SE V6 Auto
85 2m4
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Points: 284 		Direct Link To This Post Posted: 23 June 2008 at 11:31pm

run to Victoria... about 80% highway

224.3kms on 23.94liters cost $35.17 in victoria

Marcels black 86se v6 auto
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Points: 3033 		Direct Link To This Post Posted: 18 November 2008 at 2:27pm

'86 GT Fastback (Ever so slightly modified)

1000KM pure highway

201L of fuel consumed

4.975KM per litre. It should be noted that towards the end of the 1000 mark the car was beginning to run hot, had two 180 pound guys in it, and was loaded with computers, food and clothes. Also worth mentioning was the fact we rarely slowed down to less than 140KM/H. Guess that last detail kinda defeats the overall intent of this though, I'll take another estimate from non-psychotic driving and post it later.
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Points: 4039 		Direct Link To This Post Posted: 19 November 2008 at 5:27pm

Dr. Fiero could you add a note to my Highway milage, that I was also towing a fully loaded utility trailer at the time.  I was  averging 140kph wtih sprints to 160kph.

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Points: 3033 		Direct Link To This Post Posted: 19 November 2008 at 7:52pm
I suppose Capt Fiero's and my own could be used to demonstrate the worst possile fuel economy. =)
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Points: 5 		Direct Link To This Post Posted: 20 November 2008 at 5:49pm

Well John, you might as well add my sad figures to the table.

1986 GT auto

173 km 80% city (driving like an old lady)

26.037 L

173 ÷ 26.037 x 2.35 = 15.61 mpg   

 
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