Actually got decent gas mileage
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Amateur
Joined: Feb 2012
Posts: 47
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@unregistereduser
Thank you for that info. I am using odometer mileage. My truck is 4x4, living in Wisconsin, 2wd is useless. I had a 2wd Ford and thats a mistake Ill never make again(both 2wd truck, and Ford). As for the mileage, I didnt buy the truck expecting great, or even good gas mileage. To calibrate to the 245s, all I need is the PCM reprogrammed, correct? My tires are inflated to 35 psi, and I do need to get an alignment, just waiting for tax returns for that, along with a couple more things I wanna do with the truck(k&n air filter, new plugs and wires, was gonna get cai but now im rethinking that and some other misc stuff that has nothing to do with fuel efficiency) Will being calibrated to the 265s, will that cause any issues other than odometer miles running high, or is it ok to not get it taken care of right away?
Thank you for that info. I am using odometer mileage. My truck is 4x4, living in Wisconsin, 2wd is useless. I had a 2wd Ford and thats a mistake Ill never make again(both 2wd truck, and Ford). As for the mileage, I didnt buy the truck expecting great, or even good gas mileage. To calibrate to the 245s, all I need is the PCM reprogrammed, correct? My tires are inflated to 35 psi, and I do need to get an alignment, just waiting for tax returns for that, along with a couple more things I wanna do with the truck(k&n air filter, new plugs and wires, was gonna get cai but now im rethinking that and some other misc stuff that has nothing to do with fuel efficiency) Will being calibrated to the 265s, will that cause any issues other than odometer miles running high, or is it ok to not get it taken care of right away?
Administrator
Joined: Apr 2010
Posts: 87,479
Likes: 4,223
From: Clayton MI
@unregistereduser
Thank you for that info. I am using odometer mileage. My truck is 4x4, living in Wisconsin, 2wd is useless. I had a 2wd Ford and thats a mistake Ill never make again(both 2wd truck, and Ford). As for the mileage, I didnt buy the truck expecting great, or even good gas mileage. To calibrate to the 245s, all I need is the PCM reprogrammed, correct? My tires are inflated to 35 psi, and I do need to get an alignment, just waiting for tax returns for that, along with a couple more things I wanna do with the truck(k&n air filter, new plugs and wires, was gonna get cai but now im rethinking that and some other misc stuff that has nothing to do with fuel efficiency) Will being calibrated to the 265s, will that cause any issues other than odometer miles running high, or is it ok to not get it taken care of right away?
Thank you for that info. I am using odometer mileage. My truck is 4x4, living in Wisconsin, 2wd is useless. I had a 2wd Ford and thats a mistake Ill never make again(both 2wd truck, and Ford). As for the mileage, I didnt buy the truck expecting great, or even good gas mileage. To calibrate to the 245s, all I need is the PCM reprogrammed, correct? My tires are inflated to 35 psi, and I do need to get an alignment, just waiting for tax returns for that, along with a couple more things I wanna do with the truck(k&n air filter, new plugs and wires, was gonna get cai but now im rethinking that and some other misc stuff that has nothing to do with fuel efficiency) Will being calibrated to the 265s, will that cause any issues other than odometer miles running high, or is it ok to not get it taken care of right away?
Grand Champion
Joined: Apr 2010
Posts: 5,011
Likes: 6
From: Meeker, CO
You're welcome!
I can relate. They're worthless in Colorado, too.
Yep. From 98.5 onward it's all done via the OBDII port under the dash.
You'll pop into overdrive too early, which can lead to hunting in and out of overdrive if you're trying to maintain speed near the shift point. You'll also get TCC lock a bit early, but that shouldn't hurt anything if you're not getting slip or chatter on engagement.
I wouldn't worry about it, myself, unless I was already concerned about the transmission looking for an excuse to retire.
I don't know that I'd consider a CAI "worthless" as some do. I've got a K&N and my perception is that it made a positive difference. Not a big difference, but an appreciable difference.
With the K&N, exhaust behind the manifolds, updated ignition (it's a mountain truck), and a Superchips towing tune, burning Top Tier gasoline, I see 14.8MPG at 75MPH and 15.9MPG at 65MPH, on the flats, turning 265/75's and with a few hundred additional pounds in the bed. It's not incredibly difficult to gain 10% in fuel economy on these old beasties, but not far beyond that you'll run into diminishing returns because it takes a certain amount of power to keep these old dudes rolling along pushing air out of the way.
I can relate. They're worthless in Colorado, too.
I wouldn't worry about it, myself, unless I was already concerned about the transmission looking for an excuse to retire.
I don't know that I'd consider a CAI "worthless" as some do. I've got a K&N and my perception is that it made a positive difference. Not a big difference, but an appreciable difference.
With the K&N, exhaust behind the manifolds, updated ignition (it's a mountain truck), and a Superchips towing tune, burning Top Tier gasoline, I see 14.8MPG at 75MPH and 15.9MPG at 65MPH, on the flats, turning 265/75's and with a few hundred additional pounds in the bed. It's not incredibly difficult to gain 10% in fuel economy on these old beasties, but not far beyond that you'll run into diminishing returns because it takes a certain amount of power to keep these old dudes rolling along pushing air out of the way.