Cruise Control vs. MPG - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by volwing, this thread has received 4 replies and been viewed 1245 times.

 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 02-21-2008, 07:01 PM Thread Starter
Junior Member
 
Join Date: Aug 2007
Posts: 46
Points: 2,820
Thanks: 0
Thanked 0 Times in 0 Posts
Cruise Control vs. MPG

When using the cruise control I am contiunually seeing the boost increase from less then 5 psi to maybe 20 psi when encountering inclines. However with the cruise control off I maintain my spead the old fashion way with little RPM change and the boost stays low. Being my first diesel perhaps my MPG will increase if I don't use the cruise control. Does this make sense?
volwing is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 02-21-2008, 07:26 PM
 
Join Date: Dec 2008
Posts: 32
Points: 949
Thanks: 0
Thanked 0 Times in 0 Posts
i Have 38K on my 6.4.
I've tried both ways and i get the best milage with the cruise set around 78 mph.
My big assed foot keeps creepin up the speed if i don't.
mpg has stayed constant @ 13 forever.
you have to just try it for yourself

goo luck

jim
Okboater is offline  
post #3 of 5 (permalink) Old 02-23-2008, 06:01 PM
 
Join Date: Jan 2008
Posts: 99
Points: 9,498
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by okboater
i Have 38K on my 6.4.
I've tried both ways and i get the best milage with the cruise set around 78 mph.
My big assed foot keeps creepin up the speed if i don't.
mpg has stayed constant @ 13 forever.
you have to just try it for yourself

goo luck

jim





all my hihgway miles are at 75 on cruise or not


ive tried both

drove hours non stop on cruise and no cruise

no change in MPG
Bender870 is offline  
post #4 of 5 (permalink) Old 02-23-2008, 06:15 PM
Dually Club #3
 
jdydiesel's Avatar
 
Join Date: Jul 2007
Location: Pleasant Valley Ca.
Posts: 2,674
Points: 79,969
Thanks: 262
Thanked 139 Times in 120 Posts
It is hard to beat a computer when it comes to fuel mileage. Leave it in cruise, there will be an increase mileage, you might not see it but it is there.

Jason




06 F-350 4x4 CC LB Tow Boss Lariat 6.0l auto. Banks PowerPDA, Banks SpeedBrake, FICM Atlas 40 Tune, ARP Studs, PowerMax GT3788VA turbo, Homemade coolant filter, EGR valve delete spool, Monster Exhaust, K&N Cold air intake,Mishimoto Radiator,Husky mudflaps, Line-X bed liner, Recon lights, TUNED BY Innovative.
72 F-250 Gasser.FOR SALE
jdydiesel is offline  
post #5 of 5 (permalink) Old 02-23-2008, 11:22 PM
Super Moderator
 
John_G's Avatar
 
Join Date: Dec 2008
Location: Tyler, TX
Posts: 4,247
Points: 74,707
Thanks: 101
Thanked 407 Times in 347 Posts
I've not driven a 6.4L any distance on the highway, but many modern EFI vehicles actually are WAY too sensative to small changes in speed (hills etc) and they constantly "pump" the throttle from too closed to too open. This will NOT improve economy.

THE biggest improvement most people can make is in terms of driving SPEED. Slower = better economy, often LOTS better.

'93 F-250 HD, 7.3L IDI, 5spd - FARM TRUCK
I Support: Trailer brakes an every axle over the towing vehicle's GVW; CDLs for RVers; Safety inspections for ALL vehicles and 6 axle trucks (97K GVW proposal).

Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote - Benjamin Franklin

I vote for LIBERTY!
John_G is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Diesel Truck Forum - TheDieselGarage.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome