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Old 02-06-2020, 09:27 AM   #1
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Interstate cruising speed

When on an Interstate with posted limits of 70-75 MPH what is your typical cruising speed with light traffic, clear & dry with miles and miles of straight road ahead?
Myself I like 64-65 mph.
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Old 02-06-2020, 09:37 AM   #2
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Right hand lane @ 62-65 mph. Saves gas (usually gain 1-2 mpg around the 62 mark), and its safer.
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Old 02-06-2020, 09:46 AM   #3
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65 , 70 , 75 depends
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Old 02-06-2020, 09:53 AM   #4
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64.
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Old 02-06-2020, 09:56 AM   #5
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About 62-65
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Old 02-06-2020, 09:56 AM   #6
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The speed limit not faster than 75
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Old 02-06-2020, 10:05 AM   #7
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The 3500’s sweetspot is 66-67 when hauling
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Old 02-06-2020, 10:05 AM   #8
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65mph most of the time. I have found that my config seems to really like 68-70mph. So if the limit allows, I'll run that.
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Old 02-06-2020, 10:15 AM   #9
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Our toad is not supposed to be pulled over 70, so never over 65.
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Old 02-06-2020, 10:15 AM   #10
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My sweet spot with this particular set-up is 66-67 MPH. I'll often run up to 70 MPH to pass.

It has, in the past with other tow configurations been lower. (64-65 MPH)

If the speed limit is 70-75... let 'em go by.
No need for us to be anywhere that quickly.
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Old 02-06-2020, 10:18 AM   #11
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70. Even though my tires are rated up to 75mph, the fuel penalty increases dramatically, so I may go down to 68, but don't want to create a traffic obstruction going too slow. If you're not going at least the posted speed limit in good conditions like that, you are becoming a traffic hazard, as most of the traffic will be going at least the posted limit, if not faster. I really don't like tractor trailers barreling down on me if I'm going too slow for conditions.
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Old 02-06-2020, 10:20 AM   #12
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I like the MPG of that I get driving around 65. However I don’t like to drive more than 10mph under speed. So when traveling in 75 MPH drive about 67. When in the 80MPH of I 10 west of San Antonio I drive about 72
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Old 02-06-2020, 10:23 AM   #13
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65.. right lane, let em rush by.
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Old 02-06-2020, 10:35 AM   #14
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Quote:
Originally Posted by dalford View Post
65.. right lane, let em rush by.
Me too . . . . .
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Old 02-06-2020, 10:39 AM   #15
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68 is my rigs cruising speed on freeways that will allow it. It also limits the passing of semis since most of them seem to go around this speed also.
So 68 is my max speed, I'm never in a hurry to get anywhere since retiring
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Old 02-06-2020, 10:43 AM   #16
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65 mph, 1500 rpm, 12 mpg
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Old 02-06-2020, 10:48 AM   #17
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I do not exceed 65 regardless of speed limit
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Old 02-06-2020, 10:50 AM   #18
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Quote:
Originally Posted by jgahlhoff View Post
About 62-65
This ^^^^^.
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Old 02-06-2020, 10:53 AM   #19
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65mph.
Best compromise between getting there and fighting the headwind. I can often use cruise control at this speed. Also more tire temperature friendly.
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Old 02-06-2020, 10:56 AM   #20
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Old Truck (Excursion) 70, with occasional gusts to 75.

New Truck (Ram), 68.

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