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2014 6.2l gas mileage WOW

dodgehemi0

By dodgehemi0
in Engines & Drivetrain

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Luster Senior Enthusiast

Luster

Posted
Posted

Ya 93

Really hard to find anything above 91 around here... and it's all between 5-15% Ethanol. Our Hy-Vee gas stations were running 93 pure gas, no Ethanol for years, but recently switched to 10% Eth, 91 Octane. Less Ethanol = better gas mileage.

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Newm Enthusiast

Newm

Posted
Posted

Good numbers. How many miles on the truck and what rear end?

 

My best in my 6.2 has been 20.02 MPG running between 65-70 most of the time. It seems to be improving though lately a little as I just passed 2K miles.

dodgehemi0 Enthusiast

dodgehemi0

Posted
  • Author
Posted

Good numbers. How many miles on the truck and what rear end?

 

My best in my 6.2 has been 20.02 MPG running between 65-70 most of the time. It seems to be improving though lately a little as I just passed 2K miles.

3000+ 3.42

 

 

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dodgehemi0 Enthusiast

dodgehemi0

Posted
  • Author
Posted

23.9 is the best I've managed on a 50 mile stretch, cruising at 55 with no AC in my 6.2L attachicon.gifImageUploadedByTapatalk1400779844.155829.jpg

Shoot my 50mile best is 27.5

 

 

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TJay74 Senior Enthusiast

TJay74

Posted
Posted

I have seen as good as 24mpg on the DIC when heading North into the city with a South tailwind, but so far my long trip actual hand calculated averages have been in the 19.2-20.5mpg range.

 

6.2L with 3.42.

austingta Enthusiast

austingta

Posted
Posted

I thought that there was no point in using 93 octane in a vehicle programmed for 87. Is that true?

krzyd Enthusiast

krzyd

Posted
Posted

Ya'll are crazy for driving so slow :P

Big6.2Dan Enthusiast

Big6.2Dan

Posted
Posted

I thought that there was no point in using 93 octane in a vehicle programmed for 87. Is that true?

the new trucks are all "programmed for 93" and use the knock sensors to detune. Lower octane = more knock = more timing pulled = less power and generally less MPG. They also use a real-time ethanol content analyzer to determine the actual percentage of ethanol in the fuel and add timing based on the ethanol tables. Again, more ethanol = less knock = more advanced timing = more power, but because of the lower energy density of ethanol you will still see less mileage, but the engine can take advantage of the higher octane of the fuel. Long story short, the new trucks are basically tuned for 93 on for gas and detuned using the knock sensors so that you can use whatever fuel.

austingta Enthusiast

austingta

Posted
Posted

the new trucks are all "programmed for 93" and use the knock sensors to detune. Lower octane = more knock = more timing pulled = less power and generally less MPG. They also use a real-time ethanol content analyzer to determine the actual percentage of ethanol in the fuel and add timing based on the ethanol tables. Again, more ethanol = less knock = more advanced timing = more power, but because of the lower energy density of ethanol you will still see less mileage, but the engine can take advantage of the higher octane of the fuel. Long story short, the new trucks are basically tuned for 93 on for gas and detuned using the knock sensors so that you can use whatever fuel.

Very interesting. I need gas now, so I will do a test! Thanks

Crf450r420 Enthusiast

Crf450r420

Posted
Posted

5.3L is programmed to run on 87 and flex. The 6.2L is not flex and programmed to run 91 octane with up to 10%. I just decided to fill up with straight gas next time I get really low and can to see how much better I can do. Currently my best is 23.3 for 50 miles and my DIC is usually .5 higher than calculated.

20140423 191538

Screenshot 2014 05 04 00 26 16

gmissed Enthusiast

gmissed

Posted
Posted

5.3L is programmed to run on 87 and flex. The 6.2L is not flex and programmed to run 91 octane with up to 10%. I just decided to fill up with straight gas next time I get really low and can to see how much better I can do. Currently my best is 23.3 for 50 miles and my DIC is usually .5 higher than calculated.

What app are you using to collect the data? Thxs.

Big6.2Dan Enthusiast

Big6.2Dan

Posted
Posted

They both are actually initially tuned to run 93. not 91, or 87. you can run 87 in both if you would like. It's "recommended" on the 6.2 so that the power output is as advertised, and because the V.E. and C.R. can come into play with pre-detonation. Again, the computer uses it's sensors to adjust parameters accordingly. You are correct, the 6.2 is not flex and will only properly run up to the 10%, anything above is a wash. The 5.3's are pretty well setup to determine, and properly run any available pump fuel. I wouldn't recommend running non leaded 110....you wont get anything from it due to the lack of actual real-time octane sensor, but the higher your actual ethanol content, the more power you will receive. The base numbers for the 5.3 are on 87, those numbers will increase with 89, 91, or 93

Crf450r420 Enthusiast

Crf450r420

Posted
Posted

They both are actually initially tuned to run 93. not 91, or 87. you can run 87 in both if you would like. It's "recommended" on the 6.2 so that the power output is as advertised, and because the V.E. and C.R. can come into play with pre-detonation. Again, the computer uses it's sensors to adjust parameters accordingly. You are correct, the 6.2 is not flex and will only properly run up to the 10%, anything above is a wash. The 5.3's are pretty well setup to determine, and properly run any available pump fuel. I wouldn't recommend running non leaded 110....you wont get anything from it due to the lack of actual real-time octane sensor, but the higher your actual ethanol content, the more power you will receive. The base numbers for the 5.3 are on 87, those numbers will increase with 89, 91, or 93

My manual for my 6.2L truck says run 91, but I only have one option for that around me and it cost more the 93 at the place right by it.

What app are you using to collect the data? Thxs.

The app is called, Acar. You can use it for free. You only need to buy it when you want to restore a backup. By then you will know if you want to purchase it.

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