Oil viscosity - Ford F150 Forum - Community of Ford Truck Fans



Oil viscosity

Reply
 
 
 
Thread Tools Search this Thread
Old 11-26-2007, 08:56 AM   #1
Junior Member
Thread Starter
 
Join Date: Nov 2007
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Default Oil viscosity

Hey there,

New kid on the block around here. I just got my second F150. It is a 2003 with a 4.6 V8 and 30,000 miles. (Nice truck) My question, can I run a thicker oil than the 5w/20 it calls for? That seems too whimpy for a V8 to me! I live in Ohio and it can get cold here too. My 99 called for 5w/30 and I ran 10/30 in it.

So, anybody had experience with this?

DUStBIKER
dustbiker is offline   Reply With Quote
Old 11-28-2007, 03:43 AM   #2
Member
 
Join Date: Sep 2007
Location: Wyoming, MI
Posts: 48
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Hi. I have a 2003 5.4 I live in Michigan and it unfortunately gets cold here too. Right now its 19 degrees. Haha. I use 5w/20 Mobile one. Oh yeah the truck has 50,000 miles. And the oil pressure is still a little higher than the center on the meter. So I would run the recommend oil until you get 100,000 plus miles. Just my opinion though.
Metalmaxx is offline   Reply With Quote
Old 11-28-2007, 03:01 PM   #3
Junior Member
 
Join Date: Nov 2007
Location: Valdosta, GA
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Default Cold Weather Oil

I'm no expert, but I think thinner oil is better in cold climates, so I would definitely stick to the 5W20. Looking at the manuals from other cars, I see manufacturers generally recommend the next weight up for hot climates, so it makes sense to me to use a lighter weight in cold areas. Lower viscosity means it is faster to get the oil to the top of the block when it's 10 degrees out when you start it. IMHO
Big Al is offline   Reply With Quote
Old 11-28-2007, 05:22 PM   #4
Senior Member
5 Year Member
 
wde3477's Avatar
 
Join Date: Jul 2007
Location: Cape Girardeau MO
Posts: 2,513
Thanks: 0
Thanked 42 Times in 42 Posts
Default

Suggest to stick with the OEM recommendation on viscosities.

One thought is that newer engines may have tighter tolerances and closer fits than their older predecessors, requiring a thinner oil to adequately lubricate.
wde3477 is offline   Reply With Quote
Old 11-28-2007, 05:48 PM   #5
KAC Shooter
5 Year Member
 
Join Date: May 2007
Location: West Palm Beach, FL
Posts: 3,617
Thanks: 0
Thanked 45 Times in 40 Posts
Default

5w30 and 10w30 are just fine. 5w20 is used to satisfy CAFE fuel efficiency standards. Prior to 1999, 4.6Ls got 5W30 from the factory. My 2002 Exploder 4.6L uses 5W30.
obusnizzle is offline   Reply With Quote
Old 11-29-2007, 03:52 AM   #6
Member
 
Join Date: Sep 2007
Location: Wyoming, MI
Posts: 48
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by Big Al View Post
I'm no expert, but I think thinner oil is better in cold climates, so I would definitely stick to the 5W20. Looking at the manuals from other cars, I see manufacturers generally recommend the next weight up for hot climates, so it makes sense to me to use a lighter weight in cold areas. Lower viscosity means it is faster to get the oil to the top of the block when it's 10 degrees out when you start it. IMHO
You are right. 5w/20 means when the oil is cold it is a 20weight oil. And once it warms up, it is 5weight oil.
Metalmaxx is offline   Reply With Quote
Old 11-29-2007, 07:56 AM   #7
Junior Member
Thread Starter
 
Join Date: Nov 2007
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Default

I'm concerned about tolerances too and puzzled that the same engine can have different oil weights? Maybe it is about the fuel comsuption. Have a buddy that has 2 LTDs, same year, same motors and they have 2 different oil recomondations. I don't want this to smoke at start up like my old 99.

Thanks for the input guys!
dustbiker is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
coolant mixing with oil seelhammer 1997 - 2003 Ford F150 12 06-07-2016 12:46 AM
coolant mixing with oil seelhammer 1997 - 2003 Ford F150 11 02-09-2016 12:52 PM
Oil Leak on XLT 5.0 - Oil Filter/Cooler Assy hwmeador 2015 - Present Ford F150 6 09-24-2015 09:43 AM
Another P0012, but maybe a little different KwitcherBitchin 2004 - 2008 Ford F150 17 09-15-2015 09:22 AM
Platinum 5.0 oil color and level Takeda 2015 - Present Ford F150 17 09-05-2015 11:20 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 06:23 AM.


Copyright 2006 - 2016 F150Forum.com