slamarre Posted April 19, 2008 Report Share Posted April 19, 2008 Hi, Drove back with my new SGT 07 and the onboard computer was displaying a 29.5 average MPG? Drove 265 miles from Perry, GA to St Augustine FL with an average speed of 65mph Is that a true estimate or we cannot rely on this number? If this is true, that is amazing espacially with the price of the premium 20 cents shy of 4$... Thanks. Link to comment Share on other sites More sharing options...
carnut Posted April 19, 2008 Report Share Posted April 19, 2008 Hi, Drove back with my new SGT 07 and the onboard computer was displaying a 29.5 average MPG? Drove 265 miles from Perry, GA to St Augustine FL with an average speed of 65mph Is that a true estimate or we cannot rely on this number? If this is true, that is amazing espacially with the price of the premium 20 cents shy of 4$... Thanks. Fill your tank up and calculate it manually? Link to comment Share on other sites More sharing options...
stump_breaker Posted April 19, 2008 Report Share Posted April 19, 2008 Don't trust the OBC. Do it manually. Link to comment Share on other sites More sharing options...
69dejavue Posted April 19, 2008 Report Share Posted April 19, 2008 I have travelled at 70 mph and received 27 mpg with the OBC and manually. These cars really do get great mileage if not pushed. Link to comment Share on other sites More sharing options...
slamarre Posted April 19, 2008 Author Report Share Posted April 19, 2008 I think that the trick is to stay below 2,000 RPM. I was always driving around 1,800 RPM. Anyway, i will calculate it manually. Link to comment Share on other sites More sharing options...
fatboy Posted April 19, 2008 Report Share Posted April 19, 2008 I think that the trick is to stay below 2,000 RPM. I was always driving around 1,800 RPM. Anyway, i will calculate it manually. my SGT isnt equiped with OBC. but i manually calculated a similar length trip and got just under 24 mpg. not all of the trip was on interstate. Link to comment Share on other sites More sharing options...
carnut Posted April 19, 2008 Report Share Posted April 19, 2008 My GT 500 has gotten as good as 26 mpg, cruise on, 65 mph. Link to comment Share on other sites More sharing options...
AstroDan Posted April 19, 2008 Report Share Posted April 19, 2008 Hi, Drove back with my new SGT 07 and the onboard computer was displaying a 29.5 average MPG? Drove 265 miles from Perry, GA to St Augustine FL with an average speed of 65mph Is that a true estimate or we cannot rely on this number? If this is true, that is amazing espacially with the price of the premium 20 cents shy of 4$... Thanks. Premium at #3.80? Try $4.10 here in Norcal! Link to comment Share on other sites More sharing options...
carnut Posted April 19, 2008 Report Share Posted April 19, 2008 Premium at #3.80? Try $4.10 here in Norcal! That is a whole new rant Link to comment Share on other sites More sharing options...
Michael Morris Posted April 19, 2008 Report Share Posted April 19, 2008 My car wont do 65mph She has to run at least 80mph michael morris Link to comment Share on other sites More sharing options...
RogerS Posted April 19, 2008 Report Share Posted April 19, 2008 My car wont do 65mph She has to run at least 80mph michael morris It's not that the car will not go that slow. It's the driver who can't keep his foot off the go pedal. Link to comment Share on other sites More sharing options...
TClark1976 Posted April 20, 2008 Report Share Posted April 20, 2008 My car wont do 65mph She has to run at least 80mph michael morris MM - that's just sad - but that being said - I bet you're not kidding in the least. Take off from a red light and shift through a few gears, realizing your smiling from ear to ear like a teenager who just lost his virginity. . . . . then look up in rear view to see all the other cars - wait - what cars??? There used to be cars behind you . . . then look down at the speedo to realize you're going 85+ mph. . . . . yeah - I'll buy that! I'll be one of those kids givin' you a thumbs up at the next light asking for ya to light 'em up! T-Dogg Link to comment Share on other sites More sharing options...
old school Posted April 20, 2008 Report Share Posted April 20, 2008 I average around 14.7 mpg back & forth to work driving back roads "spiritedly" not trying one way or the other for milage.. Link to comment Share on other sites More sharing options...
earlk1744 Posted April 20, 2008 Report Share Posted April 20, 2008 I have gotten high 20's regularly if I stay around 70-75. On my recent road trip back from CA to CO across Nevada, I had the assistance of a 50 mph tail wind and set the cruise control at 90 and eased up to 100 on long straights on US 50. Fallon, NV to Ely, NV, average speed 93 mph, 29.5 mpg. ...and we all paid a gas guzzler tax. Link to comment Share on other sites More sharing options...
07SHELBY GT Posted April 20, 2008 Report Share Posted April 20, 2008 Don't remember exactly what my Shelby GT got but it was close to what my Bullitt gets,24 MPG average,That includes some interstate cruising at 95.These cars get pretty good mileage considering.Trip computer is rel atively accurate at calculating average economy,Relatively but not 100% Link to comment Share on other sites More sharing options...
JeffIsHereToo Posted April 20, 2008 Report Share Posted April 20, 2008 The OBC is as accurate as any other car's which it seems not very much. There is already a topic here on this subject and a quick Google search will yield 21,000 hits on this topic mostly from people asking if the crazy high gas milage is right. My favorite was the guy in the Prius that was wondering if his 100 MPG was right. These things are not calibrated or certified...take it for what it is, but if it's really important calculate manually. Link to comment Share on other sites More sharing options...
DreamRide Posted April 21, 2008 Report Share Posted April 21, 2008 The best i ever achieved was on my way back from vegas and it said 26 @ 70 mph, cruise control on. Usually around town i get 18 and then when the loud pedal gets used alot, then its about 14-16. Never been happier wasting gas! Link to comment Share on other sites More sharing options...
ngnear Posted April 21, 2008 Report Share Posted April 21, 2008 I have not personally checked my OBC on this car. I have only filled it a couple of times (less than 900 miles on it). However, I can tell you that my truck (Diesel) OBC is way off. It displays 23 mpg; but when I calculate the final milage, I get 18 mpg. (I drive it like a little old lady) I'm sure that these cars will average in the mid 20's depending on driving conditions. Link to comment Share on other sites More sharing options...
Michael Morris Posted April 21, 2008 Report Share Posted April 21, 2008 MM - that's just sad - but that being said - I bet you're not kidding in the least. Take off from a red light and shift through a few gears, realizing your smiling from ear to ear like a teenager who just lost his virginity. . . . . then look up in rear view to see all the other cars - wait - what cars??? There used to be cars behind you . . . then look down at the speedo to realize you're going 85+ mph. . . . . yeah - I'll buy that! I'll be one of those kids givin' you a thumbs up at the next light asking for ya to light 'em up! T-Dogg I was kidding, KINDA. The car has a drone at 65 so its quiter at 80 to 85. michael morris Link to comment Share on other sites More sharing options...
mywickedshelby Posted April 21, 2008 Report Share Posted April 21, 2008 best Ive ever gotten is 23-24.......but frankly its hard to drive that slow on a hwy over long periods of time.....for me. Link to comment Share on other sites More sharing options...
maddog23 Posted April 22, 2008 Report Share Posted April 22, 2008 I average about 100 Smiles Per gallon and revert back to a 16yr old cranking my Van Halen at 85MPH! Link to comment Share on other sites More sharing options...
DreamRide Posted April 23, 2008 Report Share Posted April 23, 2008 I average about 100 Smiles Per gallon and revert back to a 16yr old cranking my Van Halen at 85MPH! Yea! Im with ya on that note! Link to comment Share on other sites More sharing options...
Kelsey Posted April 23, 2008 Report Share Posted April 23, 2008 I get around 14-15 in town. I could probably do better, but I do love the sound it makes. Link to comment Share on other sites More sharing options...
mywickedshelby Posted April 23, 2008 Report Share Posted April 23, 2008 my foot is way too heavy to ever see numbers like that! Link to comment Share on other sites More sharing options...
aaronlstiles Posted April 24, 2008 Report Share Posted April 24, 2008 my foot is way too heavy to ever see numbers like that! My Wife's shelby gt Gets 22. something around town, NO BS, I have calculated it both ways. Now my GT 500 get like 14 to 15 around town but the SGT is amazing on gas around town. Still can't believe we paid 1000 gas guzzler tax on the damn thing. Hell the new Z06 Doesn't even have a gas guzzler tax, go figure. Link to comment Share on other sites More sharing options...
mywickedshelby Posted April 24, 2008 Report Share Posted April 24, 2008 the GGT on this car is totally bogus! Link to comment Share on other sites More sharing options...
07SHELBY GT Posted April 25, 2008 Report Share Posted April 25, 2008 Trip computer said 25.2 average on this tank.I filled it at the same pump,Same time of day and temps to see just how accurate it was.Calculated it manually and my real worl average MPG,Highway and stop and go traffic is 24.1.Not bad and the trip computer was pretty close. Link to comment Share on other sites More sharing options...
twobjshelbys Posted April 25, 2008 Report Share Posted April 25, 2008 I did close to that on a trip a couple of weekends ago. I was on an increasing MPG trend on the way back from Cheyenne on I25. It was at almost 29 and still increasing when I pulled off to Hwy34 in Loveland. I had "natural boost". There was something like a 50MPH tailwind and I was going downhill. Still, I'm absolutely mpressed with the mileage this is getting, still about 23-24 in my area. I'm running Colorado 91 (which is 93 to most of you) so that might help, but it's also 10% ethanol. Link to comment Share on other sites More sharing options...
mywickedshelby Posted April 25, 2008 Report Share Posted April 25, 2008 I'll have to look for that tail wind when planning my next long trip! Link to comment Share on other sites More sharing options...
twobjshelbys Posted April 25, 2008 Report Share Posted April 25, 2008 I'll have to look for that tail wind when planning my next long trip! Going downhill both ways works too. Link to comment Share on other sites More sharing options...
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