One and ONLY gas mileage thread please

[MrSkunks]

Just got back from a small trip to the Florida keys.

15.5 MPG highest it’s ever been since my daily commute has me at like 9-10

 

[Wilson]

what kind of fuel high octane regular or the best e-30

 

[coachhomer]

I have tested this extensively on my Gen 1 6.2L with BFG KO2. At 70mph on the highway I get exactly 16.5mpg. 66mph seems to be my sweet spot at 16.9mpg. However, I just changed to Toyo M/T and my mpg at 70 is now 14.5. That’s a big hit.


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[Krin]

I have only had my Gen 1 for a month and a Half but I am at 14.4 if I keep my foot out of it, which is rare. Not sure what was in her when I bought her, but I am Running 91 in it now.

 

[Edbert]

Just thought I'd update...

My truck's duty is 90% DD, 19 miles each way.

Since purchased (trip #1) it shows 16.2.

Last 5k miles shows 16.7, I think it loosens up a bit after 13k miles and multiple oil changes.

I generally use mid-grade fuel, if I deviate it is usually for premium, but that is rare.

 

[Maxknuckles]

averaging 12

 

[Cristian]

What are people getting with a supercharger? I average 15 on trips, 13mpg when I commute to work mix of town and highway.

 

[Quaesta]

You are doing better than me with a second gen, or at least for the city.

 

[MTF]

Most I can get is 14.2 14.7 at 65-70 highway.
12.7 at 85 highway.
Around town 10.1 to 11, driving easy with remote start (10 minutes)
In town and mostly in boost 9 with remote start. (10 minutes)

 

[_veloci_]

GEN1 6.2L, never reset the gas average the whole time I've had it. Daily driver - 12 MPG