Log in or Sign up
Forums
Forums
Quick Links
Search Forums
Recent Posts
Trucking Jobs
Truck GPS
Reviews
CDL Practice Tests
Schools
Freight Factoring
Trucking Insurance
Menu
Useful Searches
Recent Posts
More...
Find Trucking Jobs
Company Driver
Dry Van
Flatbed
Refrigerated
Specialized
Owner Operator
Regional Truck Driving
Dedicated Trucking
Tanker Driver
Solo Truck Driving
Local Truck Driving
Team Truck Driving
No Experience Truck Driving
Experienced Truck Driving
OTR Trucking
Intermodal Driver
Hazmat Driver
More Trucking Job Searches
⌄
Fewer Trucking Job Searches
⌃
TruckersReport.com Trucking Forum | #1 CDL Truck Driver Message Board
Forums
>
Owner Operators
>
Ask An Owner Operator
>
Petition to oppose FMCSA speed limiter mandate
>
Reply to Thread
Reply to Thread
Username:
Message:
<p>[QUOTE="Bret1984, post: 11950250, member: 297040"]It's not physics though. Fuel efficiency has more to do with RPM's than speed. Where that "sweet spot" is on the RPM's where peak efficiency is achieved is going to vary from truck to truck. In top gear the optimal RPM range for peak efficiency may be around 60mph or it could be closer to 70mph depending on how the truck is geared. Physics effects MPG's to the extent of aerodynamics and weight. As for the optimal speed that will be the speed at which optimal RPM's are achieved in top gear for highway driving. So no, slower is not more efficient which is why the city mpg rating is going to be lower than the highway mpg rating on any vehicle despite slower speeds during city driving. If the slower you are the more efficient you are were true then city mpg ratings would be higher than highway mpg ratings.[/QUOTE]</p><p><br /></p>
[QUOTE="Bret1984, post: 11950250, member: 297040"]It's not physics though. Fuel efficiency has more to do with RPM's than speed. Where that "sweet spot" is on the RPM's where peak efficiency is achieved is going to vary from truck to truck. In top gear the optimal RPM range for peak efficiency may be around 60mph or it could be closer to 70mph depending on how the truck is geared. Physics effects MPG's to the extent of aerodynamics and weight. As for the optimal speed that will be the speed at which optimal RPM's are achieved in top gear for highway driving. So no, slower is not more efficient which is why the city mpg rating is going to be lower than the highway mpg rating on any vehicle despite slower speeds during city driving. If the slower you are the more efficient you are were true then city mpg ratings would be higher than highway mpg ratings.[/QUOTE]
Your username or email address:
Do you already have an account?
No, create an account now.
Yes, my password is:
Forgot your password?
TruckersReport.com Trucking Forum | #1 CDL Truck Driver Message Board
Forums
>
Owner Operators
>
Ask An Owner Operator
>
Petition to oppose FMCSA speed limiter mandate
>
Reply to Thread