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I still can't believe it but since I bought my '78 SC (completely stock), I've been getting right around 28mpg +/- with city driving. I wouldn't say that I'm hot rodding but I don't hesitate to be a little agressive when I have the opportunity.

What a great car!
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1978 911SC Silver/Black
Old 06-04-2007, 10:09 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #41 (permalink)
Throw it on the ground!
 
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Quote:
Originally posted by on-ramp
I've always wondered about mileage . I have a 1986 Carrera Cab (stock) but it doesn't say anything about fuel consumption in the manual. What were these car rated from the factory ?
The 3.2 came EPA rated at 16 city and 23 hwy

http://www.fueleconomy.gov/feg/bymanu.htm

In addition to a SW chip for improved mileage try swapping out your stock air filter for a K&N (sorry, not trying to start anything here but any comment about K&N filters usually starts a *****storm )

My experience:

Hwy MPG improvement with K&N filter
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1987 911 Coupe
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Old 06-04-2007, 10:40 AM
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Anyone want to help a brother out? Gas Octane rating for a 78 Euro SC? Does it matter?
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Old 06-05-2007, 06:42 AM
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Quote:
Originally posted by srandallf
i get the terrible mileage. i can see the needle drop faster than my jeep cherokee, and, $75 to fill the tank. ouch
Ditto. I filled my SC yesterday (SSIs, 2-into-1 M&K muffler).
15mpg around town, back and forth to work. It's been a while since I did any sort of highway driving. I have no clue what that gets.

Just replaced the fuel pump a couple weeks ago, had a misfire that was related to the old pump not pushing the volume it should have, so now my mileage is at the 15mpg for around town that I posted above.

Car sounds heavenly though, and it a tank.Cooper is only 25.8 avg mpg but it has MTH software, Miltek exhaust header and exhaust, ITG foam air filter. Not bad for around town with all those tweaks and a heavy foot.
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Old 06-05-2007, 08:23 AM
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DUK DUK is offline
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Just finished a 150 mile trip with only about 50 of that on the highway and got 31 mpg.

I figure that's pretty good for a spirited back road drive.
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Old 01-13-2008, 02:06 PM
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I drove my '89 Coupe from the Bay Area back to Seattle this summer and got 33 mpg on the trip. Since then, city/hwy combination is closer to 20 mpg...
Old 01-13-2008, 03:58 PM
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My stock MFI 1972 911S got 24mpg on long highway trips to the solo-II nationals. Same exact mileage as the 100hp RX7s (1st generation) I was convoying with.
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Old 01-13-2008, 07:22 PM
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I did a 500 mile-ish trip in the summer and got 24mpg (UK imperial) which is about 20 mpg US. Very little of that was highway, all across rural Wales so I thought that was pretty good considering modern performance cars struggle to get that, especially with regular use of WOT.

Still with gas prices now £1/liter that trip cost me north of $200 in gas alone. Coming to a pump near you soon!
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Old 01-13-2008, 11:04 PM
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when driving to france average speed 100 mph i noticed 1 liter on 10,5 km. city 1:7.
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Old 01-13-2008, 11:23 PM
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One of my Porsche books references the CAFE testing that the 911s went through and said that although the 3.2 was rated at 18/25, they actually achieved 40 mpg at a steady state highway speed of 50 mph on narrow tires. (But how many of us do that!)

That said, my 87 averages about 22 in mixed driving and will get around 27 highway if on a long trip.
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Old 01-14-2008, 08:37 AM
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with 50 psi in the tires too!

I drove it to Shrevport Sat/Sun but it was raining Sat. and I was traveling with a buddy in his Ferrari 400i so why bother checking milage.
Old 01-14-2008, 11:00 AM
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My 993 C4 delivers a consistent 23-27mpg at 75-90mph. In fact that has been the case ever since we drove it out of Werks 2 in Stuttgart back in september of 1995. In fact I have a photo of the speedo and computer face hanging in my living room, taken on the A5 autobahn enroute to visit Louis Ruf in Paffenhausen. The speedometer is reading 180mph/290kmh and fuel consumption at 17.0mpg! It's a friggin econobox in comparison to most other cars...

About two years ago I accidentally filled with 87 Shell..She's been running on 87 ever since, with a 93 fill-up every third tank.

Last edited by fast911ray; 01-14-2008 at 12:13 PM..
Old 01-14-2008, 12:06 PM
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My '69 911S got about 22-23mpg--180hp. My '03 996 gets 22-24mpg all around. On trips if I set the cruise control, can get 28-30mpg. Amazing to have that much hp on tap, but have a fuel management system that will only deliver what the engine needs.

I didn't buy the 996 for high mileage, but wouldn't consider some of the competitors because of low fuel mileage. Poor mileage just seems like a never-ending use tax.
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Last edited by RF5BPilot; 01-15-2008 at 05:28 AM..
Old 01-14-2008, 02:22 PM
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25-30 mpg with a steady foot, keeping it below 75. But I've got the Cool Collar, so you know, results will vary. I hear these cars go fast, too.
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Old 01-14-2008, 02:28 PM
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[QUOTE=mthomas58;3306578]The 3.2 came EPA rated at 16 city and 23 hwy

http://www.fueleconomy.gov/feg/bymanu.htm

QUOTE]

Haven't see that web site before. FWIW, those are the "revised" EPA estimates. I have a PDF of a 1984 Car and Driver review where they listed a 5.3 second 0-60 spring and EPA ratings of 20 city / 32 highway with 24 combined.



I, of course, trashed my odometer gear shortly after acquiring my '84, but after replacing it this summer made a couple 300-350 mile runs. They did include about a dozen stops on each for photo-taking and short "city-speed" runs through small towns, but I still managed about 28.

Yes, no one buys a 911 for fuel economy (but I'd love to have someone fueling up their new SUV hybrid to belittle me at the pumps for my waste of fossil fuels). But it's nice to know that when you're around where I live, and it's at least a good 40 miles of flat-as-a-pancake, straight-as-an-arrow roads before you get to anything remotely interesting, that you can save a little bit of money before you put some heat in the tires and start having fun
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Old 01-14-2008, 03:02 PM
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about 13 mpg in my 930. . .but I like the loud pedal
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Old 01-14-2008, 03:20 PM
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1971 911E 2.2 MFI

12 mpg city
23 mpg highway
Old 01-14-2008, 03:44 PM
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You think the 911 is bad, just try the 928. I can see the needle go down on 1 hour trip.
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Old 01-14-2008, 04:45 PM
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18.5 mpg avg on my daily 75 mi comute, car is mostly driven in 2, 3, 4 th gears to get to work- it is a 3l row motor in a 77 911, Jerry
Old 01-14-2008, 05:33 PM
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hmmm, ugh ....
I get 5.5 km per litre ... something is wrong... about 20mpg
lolo, I do bring it up past 5,000 per start and don't really drive much over the 50 kph limits in town ... now what gives?
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Old 01-14-2008, 05:49 PM
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