Join Early Retirement Today
Reply
 
Thread Tools Search this Thread Display Modes
What'sthe Big Deal about 5W-20 vesus 5W30 Motor oil?
Old 06-26-2007, 12:52 PM   #1
Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
FinanceDude's Avatar
 
Join Date: Aug 2006
Posts: 12,484
What'sthe Big Deal about 5W-20 vesus 5W30 Motor oil?

I read that oil change places and dealers are pushing it because it helps meet the CAFE standards, that sounds like a bunch of BS to me...........

Plus, they charge MORE to put it in the car.........

Can't I just run plain ole 5W-30, like the old days??:confused:
__________________

__________________
Consult with your own advisor or representative. My thoughts should not be construed as investment advice. Past performance is no guarantee of future results (love that one).......:)


This Thread is USELESS without pics.........:)
FinanceDude is offline   Reply With Quote
Join the #1 Early Retirement and Financial Independence Forum Today - It's Totally Free!

Are you planning to be financially independent as early as possible so you can live life on your own terms? Discuss successful investing strategies, asset allocation models, tax strategies and other related topics in our online forum community. Our members range from young folks just starting their journey to financial independence, military retirees and even multimillionaires. No matter where you fit in you'll find that Early-Retirement.org is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with our members, see fewer ads, upload photographs, create a retirement blog, send private messages and so much, much more!

Old 06-26-2007, 12:59 PM   #2
Thinks s/he gets paid by the post
MasterBlaster's Avatar
 
Join Date: Jun 2005
Posts: 4,359
Oil viscosity is a tradeoff. There is no definitive correct answer to the "optimum" oil.

5W-20 is definitely thinner than 5W-30. If you don't believe me then just pour a bottle of each into your engine. Many Ford engines (for example) call for the 5W-20 oil. The goal (I suppose) is to get oil lubrication quickly to those engine bearings just after startup. Thicker oils take longer to do this. The thicker oils however do protect better as the engine gets hot.


If you live in a warm climate then (per your Ford owners manual) you are allowed to use 5W-30.
__________________

__________________
MasterBlaster is offline   Reply With Quote
Old 06-26-2007, 01:23 PM   #3
Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
FinanceDude's Avatar
 
Join Date: Aug 2006
Posts: 12,484
Quote:
Originally Posted by MasterBlaster View Post
Oil viscosity is a tradeoff. There is no definitive correct answer to the "optimum" oil.

5W-20 is definitely thinner than 5W-30. If you don't believe me then just pour a bottle of each into your engine. Many Ford engines (for example) call for the 5W-20 oil. The goal (I suppose) is to get oil lubrication quickly to those engine bearings just after startup. Thicker oils take longer to do this. The thicker oils however do protect better as the engine gets hot.


If you live in a warm climate then (per your Ford owners manual) you are allowed to use 5W-30.
What about a colder climate like mine? I remember in the "old days", we switched between 10W30 and 5W30, depending on whether it was cold or warm........
__________________
Consult with your own advisor or representative. My thoughts should not be construed as investment advice. Past performance is no guarantee of future results (love that one).......:)


This Thread is USELESS without pics.........:)
FinanceDude is offline   Reply With Quote
Synthetic For Cold
Old 06-26-2007, 06:36 PM   #4
Thinks s/he gets paid by the post
 
Join Date: Jul 2003
Location: Pasadena CA
Posts: 2,695
Synthetic For Cold

For really cold places like Canada, Alaska and maybe upper US in winter synthetic oil is a good idea for easy starting. You do get some payback in lower fuel use due to lower resistance and some minor extention in oil change frequency (don't over do that, it may not break down but it still gets dirty over time). But the ability to start is great and get oil to the bearings quickly helps reduce wear too. Synthetic is good in hot weather too even though it is 'thin' it doesn't break down, but its not as compelling as in cold weather where there really is a difference in starting and quick pumping to the bearings.
__________________
T.S. Eliot:
Old men ought to be explorers
yakers is offline   Reply With Quote
Old 06-26-2007, 06:45 PM   #5
Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
cute fuzzy bunny's Avatar
 
Join Date: Dec 2003
Location: Losing my whump
Posts: 22,697
Some engine makers like the 20 weight oil because it gets lube to the upper engine a little faster.

Lots of "I put 5w30 in my car and nothing bad happened!" anecdotal stuff. Lets try that with a side by side test case for 150k miles and see how it goes. A couple of crankcases of mazola would probably be fine too.

I've pondered using 30w in the pilot, which calls for 20w oil...considering it peaks over 100 here for a couple of months a year. Most of what i've seen is that internal engine temperatures in modern motors really dont vary that much given a reasonable range of ambient temperatures.

My oil changers dont seem to charge extra for the 20w though.

A couple of oil manufacturers even sell a 5w30 thats actually a 5w20...they didnt wanna bother making two viscosities.

Now if you want a really interesting discussion, lets talk about a nice 0w20 vs a 5w20...
__________________
Be fearful when others are greedy, and greedy when others are fearful. Just another form of "buy low, sell high" for those who have trouble with things. This rule is not universal. Do not buy a 1973 Pinto because everyone else is afraid of it.
cute fuzzy bunny is offline   Reply With Quote
Old 06-26-2007, 08:37 PM   #6
Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
 
Join Date: May 2004
Posts: 11,615
The thiner oils do give slightly better mileage. Still, I'm a little worried that what the manufacturers have to recommend in order to meet CAFE might not actually be better for my engine. It seems at least possible that 5W-30 provides superior protection for bearings and longer ring life than 5W-20 at the cost of maybe 0.25 MPG. If so, I'd rather use the heavier oil. OTOH, by advising the use of the thinner oil, the new vehicle manufacturer makes millions more dollars (by reaching CAFE standards with fewer rebates for high-efficiency vehicles) and the motor won't die until it is out of warranty. No problem for GM.

I think we'll need to see some real testing and be a little suspicious of the owners manual.

I wonder when cars will start to come stock with a pump to pre-lube the top end before the motor cranks. It would cost auto makers about 100 bucks to add one.
__________________

__________________
"Freedom begins when you tell Mrs. Grundy to go fly a kite." - R. Heinlein
samclem is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
So you've saved enough: big deal. How will you spend it? Nords Life after FIRE 23 06-16-2007 08:36 AM
Remember when it was a big deal...? cute fuzzy bunny Other topics 34 03-28-2006 07:46 PM

 

 
All times are GMT -6. The time now is 12:50 AM.
 
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.