From Denver, up over Loveland Pass to Keystone and back today netted 16.9 mpg today...
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There's a guy on here that got 600 Miles on a tank once. He used low rolling resistance tires, and drove all flat at the most efficient speed. 23MPG is what he got from what I remember. This was year ago, but is posted on this forum somewhere - probably buried. I remember seeing it I couldn't believe it.
Haha yes I'm sure. I actually did two tanks is in a row and zero's the trip after each one. OKC to Tucson on two tanks of fuel. Nearly a thousand miles. Could be an anomaly ... got twenty mpg yesterday over a 130 mile trip up from Mexico back to AZ. I thought maybe it was going from 31" to 33" tires. I did the calcs, and there would be 22,044 more tire revolutions in a 501 mile trip on stock tires than the 33's. That's equal to 33.87 miles so if you adjust for this you get 467.13 miles to the tank. HOWEVER I haven't yet calculated the efficiency loss of turning the larger tires ... odds are it will be more than 1.7 gallons of fuel to make up the 33.87 miles. Either way, with a decrease in fuel mileage with larger tires, still nicking 467 miles to a tank is pretty good I think.Are you sure the trip was “0.0” when you started?
You're going to have to let us know if you get a negative fuel trim error check engine code or something. That's so crazy.Haha yes I'm sure. I actually did two tanks is in a row and zero's the trip after each one. OKC to Tucson on two tanks of fuel. Nearly a thousand miles. Could be an anomaly ... got twenty mpg yesterday over a 130 mile trip up from Mexico back to AZ. I thought maybe it was going from 31" to 33" tires. I did the calcs, and there would be 22,044 more tire revolutions in a 501 mile trip on stock tires than the 33's. That's equal to 33.87 miles so if you adjust for this you get 467.13 miles to the tank. HOWEVER I haven't yet calculated the efficiency loss of turning the larger tires ... odds are it will be more than 1.7 gallons of fuel to make up the 33.87 miles. Either way, with a decrease in fuel mileage with larger tires, still nicking 467 miles to a tank is pretty good I think.
It would be really neat to compare and contrast some data logs once you have that setup. If you'd be willing to share, I'd love to see a data log with fuel trims, fuel flow, air flow, rpms, speed, etc...@suprarx7nut I'm in the process of getting Torque Pro set up so I can monitor a few things, look at trim banks etc. The tires are 275/70/18 K02 so 33 ish but they are old, I think the second set the trucks ever had and have about half or less tred depth left. On that trip I think I had 35 psi ... maybe 40. I did baby foot it, 60-65 but no drafting or anything. Was running the AC. I kind of wanna do one more long trip. I have a feeling I need to change the timing belt soon ... it's the original from 06. Truck has almost 80k miles now.
Post a recent pic of the front cross-sectional area of your rig. If you aren't using the stock front bumper, you're blowing right through the 0.4cd (literally).It would be really neat to compare and contrast some data logs once you have that setup. If you'd be willing to share, I'd love to see a data log with fuel trims, fuel flow, air flow, rpms, speed, etc...
I've put a lot of concentration into driving my 06LX wtih the same tires at the same pressures as "hyper-miley" as possible in the last couple weeks and I can barely maintain a corrected 14mpg (so around 13MPG by the odo). I've got a little extra weight with the sliders and winch, but most my driving is by myself or just my wife so I think we're in the same ballpark. Elevation difference might explain some difference, but I wouldn't expect nearly that much.
Interesting stuff!
Dissent front with full bull bar.Post a recent pic of the front cross-sectional area of your rig. If you aren't using the stock front bumper, you're blowing right through the 0.4cd (literally).
How on earth did you get to <1% MPG from that bumper? My BS radar just went through the roof, so I'd love to see the calculations.Dissent front with full bull bar.
While I know it's not doing any favors, I think the aero impact of that bumper has an impact on the order of <1% MPG. We're looking at a ~30% difference in this case, so I consider it negligible.
Do Grille Guards Catch Wind?
One might wonder what impact all that heavy metal stuck out in front of the highly aerodynamic profiles honed by truck makers can have on cheating the wind.www.truckinginfo.com
Excerpt: “Typically, interfering with the airflow on a vehicle can impact fuel economy significantly,” said Bear. “However, Ex-Guard products minimize their effect on aerodynamic drag because they are mounted several inches away from the front of the vehicle and are designed with round tubing, allowing air to continue flowing."
I've also got no lift and actually have AHC set just below factory standard heights by ~0.25-0.5". Overall area should be very close to OEM, maybe even less.
Full skids are installed as well. Not helping on weight, but creates a nice big flat area where OEM has large gaps.
In that link they tested a bull bar setup on a semi tractor with trailer. Net results were -0.51% in mpg.How on earth did you get to <1% MPG from that bumper? My BS radar just went through the roof, so I'd love to see the calculations.
I don't doubt the bull bar stuff one bit - plus that's for a full semi tractor which has the OEM frontal area of the Vatican to start.In that link they tested a bull bar setup on a semi tractor with trailer. Net results were -0.51% in mpg.
Not my test, nor data, but seems reasonable to me. The dissent bumper doesn't add much area (does it?) and the oem bumper isn't exactly shaped like a Bugatti.
I think it makes a difference, but I think it's real small. I can't imagine the Dissent is twice as impactful on a 100 as this thing is on a semi:I don't doubt the bull bar stuff one bit - plus that's for a full semi tractor which has the OEM frontal area of the Vatican to start.
I do believe the cd changes non-insignificantly with the high clearance, angular front bumpers on the Hundys. Your gut doesn't think so when you park your rig next to an OEM rig and just pretend you're an air molecule looking to slide by?
No, closest I got was 15 MPG. I live north of Denver and almost all my driving is highway (either I-25 or the many 55-65MPH two lane county roads in my semi-rural area). Also got in some road trips this year.But your truck wasn't even getting the 17 mpg highway (an 06 epa mileage) when it was bone stock? Looking forward to seeing if there is something interesting in the datum.