What kind of gas mileage is "normal"?
In my 993TT, my gauge typically indicates between 9.5 and 10.5 mpg. A lot of my driving involves stop-and-go city commutes (unfortunately). I'm typically around 3,000 - 4,000 rpm.
I'm not too concerned about the economics of the issue, but I do want to make sure that my car is performing as it should. It idles smoothly, and I haven't come across any glaring deficiencies. However, I did purchase it used with 6,000 miles, and it's my first p-car. Is this sort of mpg normal? Thanks for the help. |
That seems low for the driving you describe, unless you are also including a moderate amount of full throttle.
Note that the computer only goes as low as 9.5. I don't recall what mods you have, if any, but in my modified TT, I get 4.5 mpg on track, 13-14 around town and ~20 on the highway. With 4.5 mpg running hard, it doesn't take much to pull your average down. |
That seems low for the driving you describe, unless you are also including a moderate amount of full throttle.
Note that the computer only goes as low as 9.5. I don't recall what mods you have, if any, but in my modified TT, I get 4.5 mpg on track, 13-14 around town and ~20 on the highway. With 4.5 mpg running hard, it doesn't take much to pull your average down. |
With a little over 18,000 miles logged on my car, I'm getting in the high teens as an average for the city/highway combo. A few months ago, on the return trip from Indianapolis back to NYC, I got close to 25 MPG on a 400 mile stretch (6th gear with cruise control set @ 70 MPH, tailwind). :D
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Anir,
I got almost the same mileage as Mark. Usually around 13-16 around town and as much as 24 on our trips. Anytime you see boost readings above zero, your mileage is being severly reduced. Rick |
Originally posted by Anir: <STRONG>In my 993TT, my gauge typically indicates between 9.5 and 10.5 mpg. A lot of my driving involves stop-and-go city commutes (unfortunately). I'm typically around 3,000 - 4,000 rpm.</STRONG> try to upshift to reduce RPM's. This will increase your mileage. Of course if you are always in traffic then nothing will help much. Good luck! Tom |
I'm not trying to 1-up you guys, but my 95C2 recorded 28.3 mpg over 715 miles interstate cruising at 70-80 in 6th (cruise control off). The engine and aerodynamics seem to be very efficient at that speed. It would seem reasonable to expect a tt to get around 25 under such conditions.
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Anir:
I would have to agree with Mark and Rick; I usually see between 12-13 on the computer, given the driving conditions you described. Of course, you could be having way too much fun with the skinny pedal. :) |
I get consistant 18 MPG with my NA 993. 24.5 on our BMW 323ci (stick).
All local driving. |
It seems that the 993 TT's get a bit less in general than the non-turbo 993s, but I'm still lower than all of you.
The traffic engineering is pretty sorry in Lexington, and you can spend a lot of time at lights. However, I've never seen better than 12-13 mpg on the highway either. I wouldn't consider myself a major hot foot (except on the highway, where I rarely go less than 80-85 mph). I've run some Lubro Moly Jectron and Ventil Sauber through the fuel system recently, and the car seems to be running great. Should I be concerned, or is a difference of 3-4 mpg no big deal (Jack, Rick, and Mark all seem to get around 13-16 mpg)? Tom, I guess I avoid low rpms in an attempt to avoid "lugging" the engine when accelerating. I try to stay in the "meaty" part of the torque / horsepower curve. Do ya'll drive at 2,000 - 2,500 rpm? Am I beating on my engine by hanging out around 3,000? Thanks again for all the help. |
Anir,
Given your driving enviroment, everything sounds fine. What's interesting is that the TT got better highway mileage than my previous C4S... go figure. Like I said before, if you see the boost readout rise above 00, your MPG is being greatly affected. As far as additives, I have always used Techron. That stuff really works keeping the carbon deposits off of the valves. I usually use a bottle of this stuff about a week before my next oil change. And, most of the time I used Chevron gas, which contains a small amount of Techron. Rick |
Anir,
My daily commute consists of some pretty hard 0-60 sprints and a fair amount of steady 3,500-6,000 RPM cruising on twisting roads with some full throttle blasts, followed by some stop and go. I average 12.7 - 13.5 on the computer. Highway trips - high teens. John |
Anir,
My daily driving involves purely stop-and-go commutes and I get 9-11 mpg. Hope that is normal :D |
Jimmy,
It's nice to see that I'm not the only one! ;) Thank you for sharing my spot at the bottom of the mpg barrel! |
My 993-powered (N/A) 964 never drops below 18 mpg. On long trips, I've seen as high as 27 mpg. This is similar to the gas mileage I got with my old 964 engine.
Road and Track's July '96 test of the 1996 993tt lists the following mpg figures: 13 mpg city, 19 mpg highway, 15 mpg normal driving. So ... it looks like a twin-turbo gets about 3-5 less mpg than a N/A car. If I was Anir, I'm sure I would be concerned about my gas mileage. Only getting 12-13 mpg on the highway means you're barely reaching the "city" rating. Perhaps all your freeway driving is being done at 120+ mph :eek: That would certainly explain things ;) |
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