Notices
5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Oil Weight

Old 05-07-2008, 03:44 PM
  #1  
mattwright101
2nd Gear Member
Thread Starter
 
Join Date: Dec 2007
Location:
Posts: 234
Default Oil Weight

changin my oil this weekend
whats a good weight to put in there?
i live in the texas panhandle so its never REALLY cold or REALLY hot
just wonderin
mattwright101 is offline  
Old 05-07-2008, 03:50 PM
  #2  
nseoi
4th Gear Member
 
Join Date: Aug 2006
Location: Miami, FL
Posts: 1,171
Default RE: Oil Weight

ive used 5w30 mobil1 full syn since day 1
nseoi is offline  
Old 05-07-2008, 03:54 PM
  #3  
.boB
3rd Gear Member
 
Join Date: Apr 2008
Location:
Posts: 939
Default RE: Oil Weight

What oil are you running now? And how's your pressure?

For a street car, you need a heavy enough oil to maintain proper oil pressure. That's all, no more. A heavier oil will create drag and cost you power. It will also wear out your pump drive parts a little sooner; especially the distributer gear. That's why so many new cars use 0W-20 oil.

You also want to keep the spread fairly narrow. A 10W-50 is less stable over time than a 10W-30.

Start with a good 10W-30 and see how it goes.
.boB is offline  
Old 05-07-2008, 03:58 PM
  #4  
mattwright101
2nd Gear Member
Thread Starter
 
Join Date: Dec 2007
Location:
Posts: 234
Default RE: Oil Weight

i was thinking a 10w30 as well
whats the difference between that and a 5w30
mattwright101 is offline  
Old 05-07-2008, 04:30 PM
  #5  
67mustang302
6th Gear Member
 
Join Date: Apr 2007
Location: California
Posts: 10,468
Default RE: Oil Weight

It depends on how hot the engine runs as well. Viscosity is rated at a certain temperature, as oil temp increases viscosity decreases. That's why most race cars run heavier oils, and in hotter climates heavier oils provide more protection.
67mustang302 is offline  
Old 05-07-2008, 04:31 PM
  #6  
mattwright101
2nd Gear Member
Thread Starter
 
Join Date: Dec 2007
Location:
Posts: 234
Default RE: Oil Weight

ok
so since its bout to be summer i ought to run heavier right?

mattwright101 is offline  
Old 05-07-2008, 04:41 PM
  #7  
brentloftis
2nd Gear Member
 
brentloftis's Avatar
 
Join Date: Mar 2008
Location: Ft Worth, TX
Posts: 346
Default RE: Oil Weight

10w30, I live in texas also, never a problem..... oil related anyway
brentloftis is offline  
Old 05-07-2008, 06:01 PM
  #8  
OneFine89Mustang
4th Gear Member
 
Join Date: Aug 2005
Location:
Posts: 1,410
Default RE: Oil Weight

most people run 10w30 in their cars..im running valvoline vr1 20w50 race oil
OneFine89Mustang is offline  
Old 05-07-2008, 06:37 PM
  #9  
ponyponer
2nd Gear Member
 
Join Date: May 2007
Location: jersey
Posts: 287
Default RE: Oil Weight

mobil 1 5w 30. full synthetic.
ponyponer is offline  
Old 05-07-2008, 07:58 PM
  #10  
.boB
3rd Gear Member
 
Join Date: Apr 2008
Location:
Posts: 939
Default RE: Oil Weight

10W and 5W refer to cold pouring charectoristics. The W stands for Winter. A 5W oil will pour better at very cold temps than a 10W will.

To change the pour charectoristics, they have to engineer the oil with specific additives. The wider the spread, the more additives. With a regular dino oil, use the narrowest spread to meet your expected weather conditions. You would want to use a 10W-30.

Synthetic are slightly differant. They can utilize a broader spread without concersn. So if you're using a semi-synthetic like Mobile 1, Penzoil, Quaker State, etc, a 5W-30 will be more than enough.

.boB is offline  

Thread Tools
Search this Thread
Quick Reply: Oil Weight


Advertising
Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.