New Ecoboost Fuel Economy = Awesome!
#17
My tires are the stock Michelin LTX A/S 255/65R17. They have an OD of 30.1", are 7.7" wide and weigh 34 lbs a piece. They are good for fuel economy, but goofy looking on such a large truck.
That's why I'm moving up to the factory 20's with the Pirelli All-Terrain Tires. Plus, since it is a 4x2 I need to have some decent tires to do anything in the dirt. Otherwise it would be next to useless offroad.
The 20" rims should be heavier than the stock 17's, but I have no idea by how much. Maybe I will weigh them without tires and post the results. The Pirelli Scorpions are 275/55R20, OD is 31.9", 9" wide, and weigh 42 lbs a piece. On the plus side, they can be inflated to 44 PSI instead of only 35 PSI like the michelins. So there should be some economy loss, but I am hoping it isn't much and should only really become evident around town. The increased diameter should make my 3.55 final drive feel like I have 3.35 differential. Maybe that will offset the increased rolling resistance at highway speed.
Only time will tell. But man do those 20's look so much nicer. They are the gunmetal FX4 wheels.
That's why I'm moving up to the factory 20's with the Pirelli All-Terrain Tires. Plus, since it is a 4x2 I need to have some decent tires to do anything in the dirt. Otherwise it would be next to useless offroad.
The 20" rims should be heavier than the stock 17's, but I have no idea by how much. Maybe I will weigh them without tires and post the results. The Pirelli Scorpions are 275/55R20, OD is 31.9", 9" wide, and weigh 42 lbs a piece. On the plus side, they can be inflated to 44 PSI instead of only 35 PSI like the michelins. So there should be some economy loss, but I am hoping it isn't much and should only really become evident around town. The increased diameter should make my 3.55 final drive feel like I have 3.35 differential. Maybe that will offset the increased rolling resistance at highway speed.
Only time will tell. But man do those 20's look so much nicer. They are the gunmetal FX4 wheels.
#18
#20
#22
#23
#25
Forgot to mention in the previous post that the EB now has about 5100 miles on it.
#26
ie reading 35mph will actually be 37mph.. 60mph will actually be 63.7mph
Run it, keep in mind that your speedo is off, flash the PCM for $90 if you want to.
#28
Update. I've got 6000 miles on the odometer and I've had the 20" FX4 wheels with Pirelli's for about 1000 miles. Average economy since the tire swap has been 17.5 MPG with 60% highway/30% city/10% trips less than 2 mi to work on a cold engine. Those short trips really kill the mileage.
Just got back from a trip to Las Vegas from Orange County CA. We had 4 guys at about 200 lbs each and a bed full of gear and beer. I averaged 20.5 MPG for the whole ride there and back. That included 7.5 hours of stop and go traffic on the way, some off-roading to bypass traffic near state line, and 4.5 hours of cruise control at 70 MPH on the way back. I think the way home by itself would have been almost 23 MPG because I remember the average being around 18.5 when we arrived. This is all with 10% ethanol 87 octane fuel.
I'd say she is breaking in nicely...
Just got back from a trip to Las Vegas from Orange County CA. We had 4 guys at about 200 lbs each and a bed full of gear and beer. I averaged 20.5 MPG for the whole ride there and back. That included 7.5 hours of stop and go traffic on the way, some off-roading to bypass traffic near state line, and 4.5 hours of cruise control at 70 MPH on the way back. I think the way home by itself would have been almost 23 MPG because I remember the average being around 18.5 when we arrived. This is all with 10% ethanol 87 octane fuel.
I'd say she is breaking in nicely...
#29
Update. I've got 6000 miles on the odometer and I've had the 20" FX4 wheels with Pirelli's for about 1000 miles. Average economy since the tire swap has been 17.5 MPG with 60% highway/30% city/10% trips less than 2 mi to work on a cold engine. Those short trips really kill the mileage.
Just got back from a trip to Las Vegas from Orange County CA. We had 4 guys at about 200 lbs each and a bed full of gear and beer. I averaged 20.5 MPG for the whole ride there and back. That included 7.5 hours of stop and go traffic on the way, some off-roading to bypass traffic near state line, and 4.5 hours of cruise control at 70 MPH on the way back. I think the way home by itself would have been almost 23 MPG because I remember the average being around 18.5 when we arrived. This is all with 10% ethanol 87 octane fuel.
I'd say she is breaking in nicely...
Just got back from a trip to Las Vegas from Orange County CA. We had 4 guys at about 200 lbs each and a bed full of gear and beer. I averaged 20.5 MPG for the whole ride there and back. That included 7.5 hours of stop and go traffic on the way, some off-roading to bypass traffic near state line, and 4.5 hours of cruise control at 70 MPH on the way back. I think the way home by itself would have been almost 23 MPG because I remember the average being around 18.5 when we arrived. This is all with 10% ethanol 87 octane fuel.
I'd say she is breaking in nicely...
#30
I used to always check the mileage and wrote down the odometer on my gas recipts. With my 07 5.4 flex screw 6.5 bed I got about 17 mpg on highway, 12-17 on mixed hiway/ city and rarely 19-20 on best conditions (tailwind twice). I'm looking forward to 2-5 mpg better on my new eco (still on order). crossed fingers !!!