28 mpg averaging 74 mph
10-09-2012, 11:43 AM
#18
Drifting
Who needs a hybrid? Driving 95 miles and not "gunning it" in anyway shape or form, I got 28 mpg with my X51 C4S as shown in the pic. The trip computer stated a 74 mph average for that highway drive. Note, however, that I was driving the middle or right lane since averaging 74 mph in CT and MA on a Sunday is slow. People were blowing by me on the left lane. To see what the mpg would do if I downshifted into 3rd, it dropped to somewhere in the low 27's mpg just for that short mash on the gas.
The thing that really amazed me was the number of motorcycles that blew by us even when pushing the limit.
10-10-2012, 01:18 AM
#19
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Ok, I'll bite. As per my avatar speed indication, the mpg was roughly 9 mpg. And yes, that was our actual speedo shot.... my wife was driving and I took the picture... This was on the autobahn. Also, 11 mpg at Monticello track.
10-10-2012, 08:14 AM
#20
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OK I bit my tongue long enough 
WHAT THE H&LL
is this a hyper mile - prius forum!!
I want to hear, I got 6 mpg and went through a tank of gas by lunch - I mean OK we know they "can" get good milage but you are NOT helping your car - those three letters everyone hates to talk about need to be driven...spun up, worked, and your piston tops need the same thing - all this putting about at 2k rpm is killing your motors - and my spirit!!
GO DRIVE THEM - red line is not an option, it is a daily event - many times - many many times - daily!
try that thing between the seats...use one number closer to (0) than (6)
ARG - these threads are SOOO boring!!
WHAT THE H&LL
is this a hyper mile - prius forum!!
I want to hear, I got 6 mpg and went through a tank of gas by lunch - I mean OK we know they "can" get good milage but you are NOT helping your car - those three letters everyone hates to talk about need to be driven...spun up, worked, and your piston tops need the same thing - all this putting about at 2k rpm is killing your motors - and my spirit!!
GO DRIVE THEM - red line is not an option, it is a daily event - many times - many many times - daily!
try that thing between the seats...use one number closer to (0) than (6)
ARG - these threads are SOOO boring!!
10-12-2012, 10:57 AM
#23
Former Vendor
I just completed a 6,788 mile R&D test run into Alberta Canada from Georgia. One leg of the trip we averaged 89 MPH for the majority of one tank of fuel when running hard through the plains. This was able to net us the maximum MPG for the trip @ 27 MPG and that was running a 13:1 highly modified generation 3 FSI test engine. Time and time again we see that higher speeds are conducive to higher MPG with these vehicles, even when making 100HP more than factory power.
10-12-2012, 11:16 AM
#25
I just completed a 6,788 mile R&D test run into Alberta Canada from Georgia. One leg of the trip we averaged 89 MPH for the majority of one tank of fuel when running hard through the plains. This was able to net us the maximum MPG for the trip @ 27 MPG and that was running a 13:1 highly modified generation 3 FSI test engine. Time and time again we see that higher speeds are conducive to higher MPG with these vehicles, even when making 100HP more than factory power.
10-12-2012, 12:03 PM
#26
10-12-2012, 12:23 PM
#27
Three Wheelin'
10-12-2012, 12:24 PM
#28
Race Director
Might try getting a rough estimate of speedometer error. Drive the hwy, zero the trip odometer at a mile marker, start your travelling watching the mile markers. Calculate the error bouncing the trip meter off the total miles travelled in mile markers. Not totally accurate but you'll get a good rough idea arriving at the first mile marker travelled. I'm registering 0.8 mile odometer at the first mile marker. This figures to calculate gas mileage divide odometer by 0.8 to get actual miles travelled. Then divide by gallon (liters) filled.
Bad news is I'm one of the low 20's or 18's mpg suffer's and it's a pretty new porsche rebuild.
For you guys with high mileage it might be a case of smaller than standard diameter tires registering higher miles than actually travelled.
Bad news is I'm one of the low 20's or 18's mpg suffer's and it's a pretty new porsche rebuild.
For you guys with high mileage it might be a case of smaller than standard diameter tires registering higher miles than actually travelled.
I have always run the OE tire sizes though but I do run the tires the rear tires especially down to the wear bars. I might note the speedo error remains consistent even as the tires wear.
Fuel mileage measuring is tricky. In my Turbo -- which has an onboard computer and I can monitor fuel mileage as I drive -- even a bit of town driving before heading out on the highway can take mles to recover from compared to immediately easing my way directly out on the highway.
Hills and head wind and traffic -- slowing down for slower cars and speeding up again to the limit once clear of slower traffic -- all work to affect gas mleage.
I just try to pick a consistent starting from a fill up technique so my numbers are as consistant as they can be. My technique is to after filling the tank is to get in the car and start the engine and write down all the data: odometer, trip odometer, mpg, range, and average speed. Then I reset this info and head out.
If I reset the fuel mileage while under way on the highway the reading can benefit to the tune of several milers per gallon easy.
Also, the nozzle auto shut off can vary from nozzle to nozzle but I have found I'm able to get pretty consistent shut offs by turning the nozzle nearly upside down when filling my cars with gasoline.
Sincerely,
Macster.
Last edited by Macster; 10-13-2012 at 01:43 PM.
10-12-2012, 12:46 PM
#29
Three Wheelin'
No matter what Ed says, I think it's Perfect to have a car with the performance to get 8-13 mpg at a track event, then get 27-30 on the highway.
When I bought this Porsche, I was tempted by several cars with fire-breathing, large engines....but was irritated by fuel guages that tried to race the speedometers.
(Now if only the economy would turn around so the State of Washington would repair its highways so I wouldn't be considering selling my Porsche for a car with a more pliant suspension....)
When I bought this Porsche, I was tempted by several cars with fire-breathing, large engines....but was irritated by fuel guages that tried to race the speedometers.
(Now if only the economy would turn around so the State of Washington would repair its highways so I wouldn't be considering selling my Porsche for a car with a more pliant suspension....)
10-12-2012, 01:12 PM
#30
Parts Specialist
Rennlist Member
Rennlist Member
LOL James - what kind of mialage you get out of that plane of yours....I bet its quite a bit more than most
fuel guages that tried to race the speedometers.
FUNNY!!
fuel guages that tried to race the speedometers.
FUNNY!!