V8 very bad mpg

[Ngonerogwu]

10.5mpg on 265 duratracs.. no racks.

I guess I should replace my calipers.

 

[MSRP.]

Is this from the computer or hand calculations?

That's the key, plus the actual distance driven with new larger tires is a % more than what is indicated on the odometer/on board average on the hvac readout.

 

[green_manalishi]

At the end of the day, the largest contributing factor is how the vehicle is driven. Here's an interesting test done on a 5.7 Tundra under various driving conditions. The takeaway is to drive steadily with minimal acceleration and braking. Don't follow too close, give yourself room to let off the gas rather than hit the brakes, and (surprisingly) windows down vs. A/C on. https://www.edmunds.com/fuel-economy/we-test-the-tips-part-ii.html


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[4by4runr]

I believe those 285s are 57lbs compared to my coopers at 47. To chime in on bone stock mpg, I have the v8 and get hand calc 20mpg but I drive 90% freeway.

 

[ElevationOverland]

Dang, what am I doing wrong. Ive got an '08 V8 all stock and I get like 14 mpg's. How are some of y'all getting 17-19?

 

[Atlanta_man]

Same here 15 on a good day

 

[BlackWorksInc]

That's the key, plus the actual distance driven with new larger tires is a % more than what is indicated on the odometer/on board average on the hvac readout.

That was the point I was going to make, with 35's it's about 14.5% difference in actual miles traveled (and speed) if you don't compensate for it.

The worst I've ever gotten is about 10.5mpg, I have averaged about 13-ish most of this summer.

 

[AuSeeker]

Dang, what am I doing wrong. Ive got an '08 V8 all stock and I get like 14 mpg's. How are some of y'all getting 17-19?

Same here 15 on a good day

If your T4Rs are in good condition mechanically, the only thing I can think of would be driving style, I tend to not exceed 2000 RPMs under acceleration as much as possible and tend to keep my max speed no more than 65 MPH, my MPG tend to be 17 to 21 MPG hand calculated, the lower is mixed city/urban, the max is highway.

 

[Nikonbiologist]

Dang, what am I doing wrong. Ive got an '08 V8 all stock and I get like 14 mpg's. How are some of y'all getting 17-19?

Lead foot! :lookout:

I get 17.5 in town with lots of stops and lights. I'm all stock except I removed the running boards! Oh, and I have 265/70/17 cooper at3s. I drive it pretty normal, no speeding like I used to in my VW GTI or WRX. It's nice not feeling like I have to be going 75 every where.

 

[fayewong]

At the end of the day, the largest contributing factor is how the vehicle is driven. Here's an interesting test done on a 5.7 Tundra under various driving conditions. The takeaway is to drive steadily with minimal acceleration and braking. Don't follow too close, give yourself room to let off the gas rather than hit the brakes, and (surprisingly) windows down vs. A/C on. https://www.edmunds.com/fuel-economy/we-test-the-tips-part-ii.html


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Yeah, No thank you. With semitrucks+construction vehicles running diesel trucks and people driving old cars smogging up the place. The last thing to do is to put my windows down. Especially when temperatures are 100 degrees +, you'd be running a hairdryer in your face at that point+ the smog pollution.

 

[Atlanta_man]

I gotta keep up with the flow of TX traffic.

 

[Gatafly]

17.5 around town for me with all stock except fj springs and billies leveling it out and of course the hcf delete. I personally would never use a oiled filter again. It will mess with your maf badly over time. The stock filter is a very good filter, stick with it imo. Everyone else has mentioned your reduction causes. . . . . costs money (mpg) to look cool. Lol

 

[AuSeeker]

I gotta keep up with the flow of TX traffic.

I'm not passed by many where I live and drive, I usually am doing the passing and I'm still able to drive as I described and get good MPG for a T4R!