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Old 06-18-2019, 06:53 PM #1
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Poor gas mileage
I have a 98 4 runner with 3 inch lift and 285 75 16 tires and I am getting 17 mpg on the freeway going at 65 mph. Is there anything I can change or do to improve the mileage ?
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Old 06-18-2019, 07:09 PM #2
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Unfortunately, that seems pretty much the standard. I have the same combination on mine and have averaged 17 all the time on the freeway for the last 4 years.
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Old 06-18-2019, 07:28 PM #3
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That's pretty much average to good for 33's, going down 265/75/16 should pick you up about 2 mpg highway, maybe more.

Keep in mind you're going about 7% further than indicated by the odometer, so make sure you factor that into the calculation
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Old 06-18-2019, 08:22 PM #4
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With the 33 tires am I going fast than what the speedometer is reading
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Old 06-18-2019, 08:31 PM #5
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With 33's and 4.10 gearing my speedo reads 65 and my GPS is reading 69.
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Old 06-19-2019, 11:47 AM #6
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Yeah 17 MPG is actually decent for 3" lift and 33s. I average 15.5 with split city/highway and I get about 18 on a good day of only highway driving.
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Old 06-19-2019, 12:03 PM #7
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That sounds about right. What tire pressure are you using? E-rated tires presumably?
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Old 06-19-2019, 12:56 PM #8
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Quote:
Originally Posted by pokeyman View Post
With the 33 tires am I going fast than what the speedometer is reading
Yes. You are actually getting ~18mpg at ~70mph. The increased tire size is changing your speedometer/odometer reading by 7.5%.

That's a reasonable number, considering you have a lift and larger/heavier tires. They were rated for 18mpg highway originally (well, that's the adjusted version of the old EPA ratings).

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Old 06-19-2019, 06:04 PM #9
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On the 2nd Gens, there were a lot of "inefficiencies" that you could improve on to increase gas mileage. I was able to increase gas mileage efficiency by almost 30% on the 3VZ-E. So far, none of the same modifications or improvements have made any significant change in mileage on my 5VZ-FE. Toyota picked up on all the air restrictions, exhaust bottlenecks and improved things quite a bit. I'm still pegged at that same number you are, in CA which adds ethanol to the fuel I can't surpass 19 MPG's of pure highway driving. Out of state in Oregon I've seen up to 21 MPG on 93 octane. Any yes, I have a good reason to run 93.

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