synthetic oil run cooler? - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 4 Old 08-28-2011, 07:52 AM Thread Starter
Join Date: Jun 2011
Location: Oak Grove, Missouri
Posts: 88
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
synthetic oil run cooler?

Just returned from a camping trip with my brother in law and sister. My brother in law has a 04 and I have an 03 6.0. Both trucks are identical except he runs Motorcraft 15w - 40 oil and I run 5w - 40 Rotella T6. Driving across Kansas heat yesterday (air temp of 97) and pulling my 10k fifth wheel my EOT hit 224* and held there plus or minus 1* at highway speeds. My brothers truck right behind me was plus/minus 1* of 237* pulling his 8k fifth wheel. Coolant temps of both trucks were always within 5* of each other. That got me to thinking does full synthetic oil and lighter weight oil cool faster than conventional oil?

226 bales of hay grossing 24260 pounds

Sinister Coolant bypass filter kit
Bulletproof EGR Cooler
Edge Insight CS
Fleetguard ELC Coolant
Rotella T6 5w-40
Rev-X additive
Warn Front Lockers
travelin_farmer is offline  
post #2 of 4 Old 08-28-2011, 05:27 PM
Super Moderator

PGreenSVT's Avatar
Join Date: Mar 2008
Location: Abingdon, Md.
Posts: 11,991
Thanks: 4
Thanked 48 Times in 19 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 3 reviews
Ynthetic oil is definitely better at handling heat than conventional oil. However when rolling down the road at 200*+ EOT you are both running 40w oils. The 5w and 15w on count when the oil is cold. when at temp they are both 40 weights.
PGreenSVT is offline  
post #3 of 4 Old 08-29-2011, 05:43 AM
Emergency Services

Join Date: Apr 2011
Location: Geraldton
Posts: 751
Thanks: 1
Thanked 3 Times in 3 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Being behind you his truck could have seen less cool airflow to the rad. Think drafting!

2005 - Excursion - Eddie Bauer - 4x4

185amp DC Power Engineering alternator
BPD oil cooler and cold weather package
Updated standpipes and dummy plugs
Edge Insight CTS with fuel pressure
No more STC fitting in the HPOP
Updated fuel pressure spring
Updated turbo oil drain
Updated turbo oil feed
Sinister Coolant Filter
Dual Batteries
Rotella T6

The best 6.0 advice I've ever seen... By NYC F-350
Fishermedic is offline  
post #4 of 4 Old 08-29-2011, 06:59 AM
Premium Member
Rick C's Avatar
Join Date: Jul 2011
Location: Yucaipa, CA
Posts: 330
Thanks: 1
Thanked 5 Times in 5 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Originally Posted by Fishermedic View Post
... Think drafting!
Now THERE'S a SCARY thought...trucks drafting while towing 5th wheels...

2005 F-450 CC Fontaine Conversion
(It's the heavy GVW one with the Dana 135, 4:88's and bigger brakes)
Link Air Ride Suspension
Banks Stuff (CAC, Exhaust)
SCT x3 with Eric's tunes
Bullitt Proofed (EGR mod, Remote oil cooler/filter)
Odyssey AGM's
High Idle Mod, CCV Mod
More $$$ to be spent i'm sure!
2001.5 Dodge 3500 CC
5.9 Cummins/6spd shaker
WAY too much reliable power
Turbo, get the picture
Rick C is offline  

Quick Reply

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


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

Email Address:


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