Useless Information

[Tonyrodz]

The biggest boost to my MPG, was acknowledging that I will get there when I get there, and driving accordingly. Sure I can drive 80, hell I still do on occasion, especially when in Houston, but it doesn't mean that i have to.

I need to learn that too. I'm still trying to figure that out.

 

[swathdiver]

I need to learn that too. I'm still trying to figure that out.

My Grand Nationals days got that all out of my system! I'm the slowest driver in my house, everyone can get to church 5 minutes faster than me! That doesn't mean that the motor never sees more than 2500 rpms, sometimes it does until the posted speed limit appears, like in my GN days.

 

[iamdub]

My Grand Nationals days got that all out of my system! I'm the slowest driver in my house, everyone can get to church 5 minutes faster than me! That doesn't mean that the motor never sees more than 2500 rpms, sometimes it does until the posted speed limit appears, like in my GN days.

Acceleration > top speed

 

[swathdiver]

Finished the last tank of Chevron 93 at 15 mpg. It had 12% alcohol content. $.24 cents a mile. Something fishy with that station, hardly anybody on Gas Buddy uses it.

Saw a Gas Buddy report showing another close by Chevron with 93 @ $3.29 per gallon. Drive on over and it's a BP now! Leave there to check the last Chevron near the highway and it was $3.55 per gallon. With my teenager's car behind me we left there and went next door to Sunoco.

There my daughter took on 93 octane fuel @ 3.29 per gallon and I filled the Yukon with 27 gallons of E85 with a 77% alcohol content, paying a mere $2.29 per gallon. She went home and I headed for the highway to let the computer adjust.

The truck got 15.2 mpg @ 71 mph and it was still going up as I pulled off the highway. Then at 40 mph for about six miles she got 18 mpg! That's $.15 per mile on the highway and $.127 cents per mile in town. Course the idling will take it down but such is life.

Long Term Fuel Trims were high at idle, -7 to -9 and -4 @ 71 mph and 0 @ 40 mph. I am thinking to try and re-torque the intake manifold bolts, not sure what the LTFTs mean.

 

[kbuskill]

Finished the last tank of Chevron 93 at 15 mpg. It had 12% alcohol content. $.24 cents a mile. Something fishy with that station, hardly anybody on Gas Buddy uses it.

Saw a Gas Buddy report showing another close by Chevron with 93 @ $3.29 per gallon. Drive on over and it's a BP now! Leave there to check the last Chevron near the highway and it was $3.55 per gallon. With my teenager's car behind me we left there and went next door to Sunoco.

There my daughter took on 93 octane fuel @ 3.29 per gallon and I filled the Yukon with 27 gallons of E85 with a 77% alcohol content, paying a mere $2.29 per gallon. She went home and I headed for the highway to let the computer adjust.

The truck got 15.2 mpg @ 71 mph and it was still going up as I pulled off the highway. Then at 40 mph for about six miles she got 18 mpg! That's $.15 per mile on the highway and $.127 cents per mile in town. Course the idling will take it down but such is life.

Long Term Fuel Trims were high at idle, -7 to -9 and -4 @ 71 mph and 0 @ 40 mph. I am thinking to try and re-torque the intake manifold bolts, not sure what the LTFTs mean.

Just out of curiosity... can/does Black Bear tune for E85???

I know on my older 08 that Diablew cannot adjust the E85 fuel tables and parameters.

I think it may be an option on the newer trucks though but not 100% sure.

 

[swathdiver]

Just out of curiosity... can/does Black Bear tune for E85???

I know on my older 08 that Diablew cannot adjust the E85 fuel tables and parameters.

I think it may be an option on the newer trucks though but not 100% sure.

Hmm, don't remember. @BlackBearPerf

 

[BlackBearPerf]

Just out of curiosity... can/does Black Bear tune for E85???

I know on my older 08 that Diablew cannot adjust the E85 fuel tables and parameters.

I think it may be an option on the newer trucks though but not 100% sure.

We do not have a specific E85 tune but we will provide tunes for 89/87 and 91+ octane. The tuner will alter the flex fuel tables in both tunes so you will be able to run E85 on both of them.

 

[swathdiver]

E85 performance update. 77% Alcohol content.

35 mph = 15 mpg
40 mph = 18 mpg
60 mph = 17.3 mpg
65 mph = 16.2 mpg
70 mph = 15.2 mpg
75 mph = 12.9 mpg

Cruise control on, no interruptions, some highway overpasses. Minimum 5 minutes at each speed resetting the AVG counter for each test.

 

[09_4WD_YUKON]

I need to learn that too. I'm still trying to figure that out.

It's tough, but I've learned to do it. Now a days I get in the right hand lane and set the cruise about 5 MPH under the posted limit (usually 63 -65 MPH)...and watch all of the idiot drivers in "hurry." It's quite comical!!

 

[Tonyrodz]

It's tough, but I've learned to do it. Now a days I get in the right hand lane and set the cruise about 5 MPH under the posted limit (usually 63 -65 MPH)...and watch all of the idiot drivers in "hurry." It's quite comical!!

I wish I could do that....sometimes. My gf HATES when I drive. I don't know why. I've only had it to 130, with her. No idea.