3.7 Owner's MPG Report

[DeepImpactS550]

100% city driving @ 1000 miles ODO and averaging right at 17.1
With an unusually heavy right foot, I'm meeting rated MPG so I can't complain.

Sponsored

 

[Horse]

Over the past 2 weeks, my overall mpg has increased from 22.9 to 23.5, and still climbing. Maybe b/c of summer blend?

 

[fordguys550]

Yeah, that helps too.

I will mention i also run 285s on all corners..

 

[Clarkson]

Rented a V6 in seattle and drove for about 3 days. 50/50 city/highway driving with a really heavy feet tho. The trip computer indicates 22mpg (87octane)

 

[soldier989]

1st tank 50/50 city and highway = 24.2mpg
2nd tank 50/50 city and highway = 23.9mpg so far

To be fair, as the engine is getting broke in more, I'm running the engine out a bit more.

 

[shahram72]

I'm not sure if it's just because my car is new but it keeps getting better. I switched to super unleaded 93 octane and it jumped 2mpg. Hovering at 26.7 in mixed driving. Very impressed. With the jump in mpg I will run super. Gonna try 87 again next time and see if it drops. If it does, I'll stick with 93. It's not supposed to make a difference with these engines but if the knock sensor retarded the timing on the 87, I can see why. I never heard any knock ever. My old F-150 I had knocked on 87 it was rated for. Had to run 89 to keep it running right. Dealer said they could adjust to make it not knock on 87, but I said I would run 89 and they said that was the best option for the engine. So rated octanes are not always what they are cracked up to be. Had a family member once who ran 87 in his Lexus. Knowing high performance Japanese engines, I told him he was saving nothing. Reduced mpg negates the money savings. Every car is different. I'm wondering to see what happens when I switch back to 87 on the V6 Mustang. Will report back here. I notice no improved power on the 93, but who's gonna feel 5-10hp on a 300hp engine?

 

[Steelhorse]

Just crossed 2500 miles...

Up until now probably 80/20 city vs highway....and the city driving is always hill-filled and spirited.

Always got around 20-22mpg until yesterday. First long trip at state highway speeds...55-65mph. Did a round trip of 140miles which yielded 27.8 mpg.

Happy to see it's just my foot influencing the tank.

 

[Jon|3.7]

21.2 /: before I switched tires and wheels it was 24 or it's just my driving idk lol

 

[SheStang]

^^I'm about the same as you, 20" wheels and around 21-22mpg...

 

[Horse]

Overall mpg bumped up from 22.9 to 23.2 after a highway trip of nearly 300 miles. The average for the trip itself is about 28 mpg.

5 weeks later, and now my overall fuel efficiency is 24mpg, with the current tank running at (almost) 27mpg so far.

Must be the summer blend.

 

[Rough Hollow Man]

My Cyclone Mustang vert "seems" to run a bit better on 93 octane and Royal Purple full synthetic ...mixed driving 25-28.6 without trying...long 300+ mile trips 29.3 without hyper-mileing. And yes, I too noticed that the car's mileage improved after about 6,000 miles.

 

[soldier989]

Just drove 50 miles out and 50 miles back for Mothers day, this was the Mustangs 1st "long" highway drive. I filled up before the trip and ended up averaging 30.5mpg. Still breaking in, I have about 850 miles on it now.

 

[mrblanche]

I'm not sure if it's just because my car is new but it keeps getting better. I switched to super unleaded 93 octane and it jumped 2mpg. Hovering at 26.7 in mixed driving. Very impressed. With the jump in mpg I will run super. Gonna try 87 again next time and see if it drops. If it does, I'll stick with 93.

So a jump to premium got you what, a little less than a 10% improvement? So if premium costs less than 10% more than regular, you're ahead. That means that if regular costs $2.00, premium can't cost more than $2.20.

That the way you have it figured, too?

 

[mrblanche]

My Cyclone Mustang vert "seems" to run a bit better on 93 octane and Royal Purple full synthetic ...mixed driving 25-28.6 without trying...long 300+ mile trips 29.3 without hyper-mileing. And yes, I too noticed that the car's mileage improved after about 6,000 miles.

Amazing things can be done with the programming on modern cars. It seems most are programmed to run a little rich for the first little while, probably to help avoid overheating the engine in the break-in period.

Where would you look for that programming? I figure it would be right next to the warranty expiration timer, right?

 

[Rough Hollow Man]

^^^Yes, that's right. And don't forget that the car probably performs a bit better on 93 octane...yea I know, some of you Dudes are about to throw the "BS flag" on that claim of slightly better performance with 93... But this Old Dude believes it is so!

Sponsored