15w40 to 5w40 Cold Start Problems - Ford Powerstroke Diesel Forum

 
LinkBack Thread Tools Display Modes
post #1 of 3 Old 03-15-2010, 06:40 AM Thread Starter
Premium Member
 
Nemesis17's Avatar
 
Join Date: Nov 2009
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
15w40 to 5w40 Cold Start Problems

After much reading and recommendations from you guys I made the switch from 15w40 to 5w40. Now when my truck is cold it fires up really rough. It seems like it over revs and misses and acts ups for about 5 seconds before it settles down. Both of our shop trucks are stock 6.0 with 15w40 and they fire up great. Mine just started doing this since I changed my oil. It seems like the basic mods I have done to "help" my 6.0 last and run better have only caused me problems. My truck ran better stock. Any help or ideas?

2005 F-350 6.0 Crew Cab Long Bed Lariat
Zoodad
Airaid Intake
4" Turbo back MBRP
6" RBP Black Tip
No kitty or muff
Coolant Bypass Filtration System
ISSPRO Gauges - Trans, Boost, & Pyro
EGR Gone
Icon 2.5" leveling kit -Bilsteins
58v Swamps FICM w/ PHP Tune
ARP studs - Black Onyx
SCT X3 Tuned By Gearhead
Nemesis17 is offline  
post #2 of 3 Old 03-15-2010, 06:38 PM Thread Starter
Premium Member
 
Nemesis17's Avatar
 
Join Date: Nov 2009
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
For the evening. Any ideas?

2005 F-350 6.0 Crew Cab Long Bed Lariat
Zoodad
Airaid Intake
4" Turbo back MBRP
6" RBP Black Tip
No kitty or muff
Coolant Bypass Filtration System
ISSPRO Gauges - Trans, Boost, & Pyro
EGR Gone
Icon 2.5" leveling kit -Bilsteins
58v Swamps FICM w/ PHP Tune
ARP studs - Black Onyx
SCT X3 Tuned By Gearhead
Nemesis17 is offline  
post #3 of 3 Old 03-16-2010, 07:36 AM
Member
 
Join Date: Jan 2010
Posts: 48
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
This doesn't answer your question but I was curious what kind of oil are you running?
I am running AMSOIL 15w40 and was able to start at -10F, thought about switching to a 5w40 but figured if I could start at -10 with out plugging in I should be OK. I'm not necessarliy an AMSOIL guy but definetly like the synthetic.
PreviousLife is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum 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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



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