5w30 vs. 10w30 oil? - Kia Forum
User Tag List

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 05-13-2009, 12:08 AM
Full Member
 
palebeachbum's Avatar
 
Join Date: Apr 2009
Location: Georgia
Posts: 98
Drives: 2006.5 Kia Optima LX 2.4L 4cyl 5-spd man.
Gallery: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

(Thread Starter)
Default 5w30 vs. 10w30 oil?

I'm not sure what viscosity oil is best for my 3G Optima's 2.4L 4cyl. The oil cap has 5w20 printed on it, but that seems awfully thin for summer temps. So I checked the owners manual and it states 5w20, 5w30, or 10w30 are fine for my temp. range. What do you guys recommend I use for best engine longevity and performance?

Also, my 4cyl. makes a clatter noise below 2,000rpm. It sounded ugly, so I had them put in 10w30 at my last oil change. It didn't help at all. Is this clatter at low rpm normal for the 4cyl? I asked my Dad about it and he said some engines clatter like that at low rpms because the compression is low at low rpms, but dissapears as rpms and compression increases. I may have misunderstood a little, or is this correct?
palebeachbum is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 05-13-2009, 05:33 AM
Senior Member
 
Join Date: Nov 2008
Posts: 241
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Default

You can use 10-30, but I'd stick with the 5-20 or 5-30 and you'll have no problems. Technically, the 10-30 and 5-30 will have the same viscosity when hot. The oils and tolerances are much different than they were years ago, so the manufacturer's recommendations have changed quite a bit. When using the recommended oil it will afford the best fuel mileage and lubrication.

No unusual engine noise here.
turbonut is offline  
#3 (permalink) Old 05-13-2009, 08:10 AM
Senior Member
 
cmhj2000's Avatar
 
Join Date: Sep 2006
Location: Montgomery Co., Pa.
Posts: 427
Drives: 09 Cobalt
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Default

5W-20 is fine. It's usually better to stick with speced viscosity for most engines and more so those with VVT.
cmhj2000 is offline  
#4 (permalink) Old 05-13-2009, 12:23 PM
PLP
Super Moderator
 
PLP's Avatar
 
Join Date: Dec 2008
Location: Haslett, MI, USA, Earth
Posts: 5,927
Drives: 2007 Kia Rondo EX V6 2.7 5P A/T; 2009 Hyundai Elantra GLS, 2.0, I4, 5 SPD M/T sedan
Gallery: 3
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 82 Post(s)
Garage

Default

Quote:
Originally Posted by palebeachbum View Post
I'm not sure what viscosity oil is best for my 3G Optima's 2.4L 4cyl. The oil cap has 5w20 printed on it, but that seems awfully thin for summer temps. So I checked the owners manual and it states 5w20, 5w30, or 10w30 are fine for my temp. range. What do you guys recommend I use for best engine longevity and performance?

Also, my 4cyl. makes a clatter noise below 2,000rpm. It sounded ugly, so I had them put in 10w30 at my last oil change. It didn't help at all. Is this clatter at low rpm normal for the 4cyl? I asked my Dad about it and he said some engines clatter like that at low rpms because the compression is low at low rpms, but dissapears as rpms and compression increases. I may have misunderstood a little, or is this correct?
Hello,
first, add info to your profile - location especially, so we wil be able to discuss the oil problem in more details

next thing, what is the mileage?

and just quick explanation:
5W20 - in general XX W YY
XX stands for high temperature viscosity, the lower the number, the lwoer the viscosity, the thinner the oil film, the better fuel economy
YY stands for low temp properties. Higher number means higher viscosity, so the lower temperature, the more energy needed to pump the oil. For example 20W50 will have high viscosity at 100C what means, old engine will perform quieter, but at low temp (below -10C, 10F) will be very hard to pump. It will look like honey.

www.kiatechinfo.com USA - free service, manuals www.kia.ca/kia-owners-manuals Canada www.kia-hotline.com Europe (paid service!) www.kia.ca/pages/owner/OwnersManual.aspx?lang=en manuals - must pick model, Canadian version - for free
PRINT IT and put on your car Do you talk/text and drive? Watch it: http://www.oprah.com/oprahshow/Watch...bsession-Video
PLP is offline  
#5 (permalink) Old 05-16-2009, 01:48 AM
Member
 
Join Date: Feb 2009
Location: Sacramento, CA
Posts: 60
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Default

Even on cars that "required" 5w-20 oil, there was consistently more wear when a 5w-20 oil was used than when a 5w-30 oil was used. This has been tested many times.

I typically use 5w-30 year round. 5w-20 oil has been specified for many cars to meet CAFE standards.
quickfingerz is offline  
#6 (permalink) Old 11-06-2010, 10:05 PM
Newbie
 
Join Date: Oct 2010
Location: Malaysia
Posts: 15
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Default

been using 10w30 as recommended by the authorised service centre here in malaysia

a mechamic friend of mine surprised of such a thin oil for 2.0l car
he said only small car (small engine displacement, eg 1 litre) uses 30 oil
while 1.6L / 2.0L car requires thicker oil, ie 40 or 50

the other car of mine which is 1.6L uses 10w40 as stated in the manual

how true is it ?
PuPPy is offline  
#7 (permalink) Old 11-09-2010, 03:38 PM
Senior Member
 
stuartadair's Avatar
 
Join Date: Apr 2010
Location: Centre of British Empire, England
Posts: 211
Drives: 08 Magentis 2.7, 08 Citroen C1, 88 Yamaha ZR750, Kinroad 50, Yuen 125-23
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Default

Quote:
Originally Posted by palebeachbum View Post
....but that seems awfully thin for summer temps.
For those of us who live in a proper hemesphere its winter right now, and damn cold. Nice thin oil is the order of the day
stuartadair is offline  
#8 (permalink) Old 02-02-2011, 07:03 PM
Newbie
 
Join Date: Feb 2011
Location: USA
Posts: 14
Drives: Couple optima's for now.
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Lightbulb How to decode oil labels.

Quote:
Originally Posted by PLP View Post
and just quick explanation:
5W20 - in general XX W YY
XX stands for high temperature viscosity, the lower the number, the lwoer the viscosity, the thinner the oil film, the better fuel economy
YY stands for low temp properties. Higher number means higher viscosity, so the lower temperature, the more energy needed to pump the oil. For example 20W50 will have high viscosity at 100C what means, old engine will perform quieter, but at low temp (below -10C, 10F) will be very hard to pump. It will look like honey.



I have a minor correction to the information you've posted.

XX= the weight/viscosity of the oil when cold, measured at 0 F
W= winter grade
YY= the weight/viscosity of the oil when the engine is at operating temperature. measured at 210 F.

so a multi viscosity oil of 5W30 flows like a 5 weight oil when cold yet will act like a 30 weight at operating temperature.

Reference List:

What Every Motorist Should Know About Motor Oil

Motor Oil Viscosity Grades Explained in Layman's Terms

What do oil viscosity numbers mean? Learn about motor oil, synthetic and regular.

Motor oil - Wikipedia, the free encyclopedia

Gear oils are rated differently so a 70w130 gear oil is not a 70 weight at 0 F and 130 weight at 210 F.

Last edited by Wrench; 02-04-2011 at 07:36 PM.
Wrench is offline  
#9 (permalink) Old 02-08-2011, 03:43 PM
Senior Member
 
stuartadair's Avatar
 
Join Date: Apr 2010
Location: Centre of British Empire, England
Posts: 211
Drives: 08 Magentis 2.7, 08 Citroen C1, 88 Yamaha ZR750, Kinroad 50, Yuen 125-23
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Default

Oh and I forgot to add...if you had a proper engine it wouldnt rattle at all
stuartadair is offline  
Reply

  Kia Forum > KIA Models > Kia Magentis & Optima Forum > 3G (2006.5+) Magentis & Optima


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Pingbacks are On
Refbacks are On