3.7L V6 Technical DiscussionsAny questions about the new engine, transmission, exhaust, tuners/CAI, or gearing can be asked here!
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the above post is a 2013 v6 pp auto. its also been 110 outside.
I personally havent had in the hwy (wife has) but around town if im nice and cruising 45-50mph and its in 6th gear (auto) the insta-mpg guage sits at 30. its the whole red light green light thing that kills it
our rental 2012 we had last month on vaca sat at 31mpg alllllll day between GA and SC
The low fuel light comes on with 2 gal left btw. drove thru that as far as I had the guts to do and still only managed to stuff 15gal in the tank on the fillup (16 gal cap). Did the math on the gal I didnt use. For about 50/50 city & hwy driving im ok with 19.8 on a brand new engine. Ill test it again after its got 2000 on it.
That's about right. The low fuel light always comes on when the computer thinks you have 50 miles left. However, I have only been able to put over 14gallons in my tank twice. Normally when I fill up I put in about 13.2-13.5 gallons.
Your mpgs should come up. I get 23-25mpg in mixed driving and I have 3.73 gears. I get 27-29mpg on the highway. The ranges all depend on how I drive.
I did a little experiment last night and set the cruise control at 55 the whole way home, and pulled 32 mpg. It really seems to be the case that once you get over 2k all bets are off.
Sucks getting passed by every Prius in Westchester though :-)
LOL, hilarious!! I can hear that Prius owner now...
Been looking at getting a 2011-12 convertible with the 3.7l and this thread is helping with that decision, thanks for all the input! I hope to report my finding soon too.
I suppose it makes sense in some ways that the Prius is the bench mark for MPG, but really how does anyone compare a Prius and a Mustang? I know where I live Hybred owners could get a special sticker that lets them drive in the car pool/HOV lane even if the driver is the only person in the car. Pretty soon you had Prius after Prius holding up traffic in the HOV lanes because to get optimal MPG they tended to drive around 53 mph or something like that. So slowing down the HOV lanes was an unexpected consequence of allowing Hybred drivers access.
I suppose that famous episode of Top Gear (British) kind of backed that up, they had a Prius drive around their test track as fast as it could go and then they had an M3 follow it and the M3 got better MPG.
So I tend to think if you love driving a Prius is not going to appeal to the same people who want a rear wheel drive muscle car, at least not the same level of appeal.
this morning there was few opportunities to drive fast, traffic was thick enough that I was pretty much stuck with going with the flow in the fast lane. SO I was cruising between 60-65 and I decided to hit the reset on the AVG MPG gauge to see what it estimated the consumption was to sustain that speed and it read out 34.4 MPG. I think that is pretty good.
This is all quite interesting. Seeing such a huge spread in fuel economy really makes me wonder. I bought my 2013 PP 6-Speed last month and I am horrified with how bad the gas mileage is. I know 2 people with new 5.0s that are getting significantly better mileage than me. If I didn't think the dealer would laugh at me, I would take it in and have it checked. Right now I'm averaging less than 20 MPG with about 65-70% on my driving on the highway at 70 MPH or less. I don't drive it hard at all. I have gotten on it a few times, but not much. It actually seems to be getting worse, not better. I have about 1600 miles on it so far. My 200 mile trip home the day I bought it it got 27 MPG with 200 lbs of stuff in the trunk and pouring down rain. I live and drive in flat, coastal region, so hills and mountains are the problem. It has been hot, and the AC is always on, but that shouldn't cause that big of a drop.
Has anyone seen a difference with the brand of gas they use? I'll try anything. I'm just really disappointed with it. Other wise it's a wonderful car.
Heat and humidity can hurt your mileage, but mileage is usually a good test of engine health. I'd check the oil level, if the rings have broken in properly, you should not be using any oil. I'd also check the tire air pressure. I have 255-45-18s from AM on mine, AM recommends 35-38 psi. I would also leave the factory oil in the car and run the **** out of it for a few tanks to break everything in, then change the oil to a synthetic in another 1,000 miles.
2012 Mustang Premium 6 speed Manual
Starkey Fog Lights
5 spoke chrome American Muscle 18" x 9" wheels
Nitto 255/45ZR18 Tires
H&R Sport Front and Rear Sway Bar
J&M lower control arms
TMI adjustable tilt headrests
Gaslock LED Shift ****
Shelby door subs
Sony 200W amp
It wouldnt hurt try different gas, i know it can make difference.
having extra weight makes a diffence
hills make a difference
temperature makes a difference
and you have to calculate your mpgs based on miles and how much gas you put in, iiknow my computer.consistantly under reports mpg.
Mine has been getting 25-27 MPG back and forth to work with the cruise set very conservatively (65-70 MPH)...but then I had something interesting happen. One day on the way home I got in with some "fast company" running the same way I usually go, and the mileage went UP instead of down. Physics says that's not the way it's supposed to work, so my only other explanation is that I found a "sweet spot" in the fuel / spark / cam timing maps somehow. Gained 1-2 mpg that trip. I think it's around 2750-3250 RPM in 6th, but haven't had a chance to check for it again.
I DON'T have the PP. I have a 12 vert premium auto. I just got back from a trip to Massanutten VA near Harrisonburg. Door to door I got 31 mpg for a total of 787 miles. Most of the trip was at between 70 - 75 with virtually no heavy traffic.
In my daily driving here in Queens NY I average 19 mpg with about 50- 50 stop and go and highway with the highway averaging 60 miles per hour.
I'm not sure what the final outcome will be, but my current tank is reading 26MPG on the economy screen(usually reads about 1.2 MPG Low). The only change I made was switching to Shell gas. I checked the tires and oil and they were just about exactly where they needed to be. The most curious part is the first 100 miles of the tank I had 2 other people and luggage in the car. I'm guessing that was an additional 400 lbs of weight and the the display was showing almost 30 MPG. Needless to say, I can't explain it.
I bought my 2013 PP 6-Speed last month and I am horrified with how bad the gas mileage is.
Right now I'm averaging less than 20 MPG with about 65-70% on my driving on the highway at 70 MPH or less.
I don't drive it hard at all. I have gotten on it a few times, but not much. It actually seems to be getting worse, not better.
I have about 1600 miles on it so far.
I'll try anything. I'm just really disappointed with it. Other wise it's a wonderful car.
Your problem is you are BABYING a brand new engine. Seriously! You NEED to run the snot out of it. NO JOKE.
Brand new engines NEED to have the rings seat. The way the rings seat is with COMPRESSION. You really need to run it hard. If you don't your rings will NEVER seat right and your engine will always give you crap MPG/Performance.
I'm not joking. Search around on Engine Break-in procedures.
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