Good read on 0w20 from Honda

[Cup of Joe]

What about when 20 weights and even 30 weights don't protect here in the US.

Hyundai/Kia recommendations for 2.4L and 3.5L thru MY2006 per the owners manual are:

5w-20, 5w-30 temp -30C to 50C
10w-30 temp -15C to 50C

5W-30 was the prefered grade per markings in the owners manual and on the engine filler cap.

However in roughtly 2008 hyundai/kia back spec'ed all 2.4L and 3.5l engines toward 40 weights regardless of model the engine was installed in.

From Kiatechinfo, hyundai provides a similar site. I have been on both.

My opinion is after a few engine failures (I had 2 failures in the 3.5L) the recommendation was changed. I also had a Hyundai Sonata with the 2.4L, I ran the car with 10w-30 and with 15w-40. The fuel economy was a bit better in warm weather with the 15w-40.

 

[friendly_jacek]

Now, this is interesting indeed! Doe we know oil temps in the said Hyundai engines?

 

[demarpaint]

Originally Posted By: TaterandNoodles
What about when 20 weights and even 30 weights don't protect here in the US.

Hyundai/Kia recommendations for 2.4L and 3.5L thru MY2006 per the owners manual are:

5w-20, 5w-30 temp -30C to 50C
10w-30 temp -15C to 50C

5W-30 was the prefered grade per markings in the owners manual and on the engine filler cap.

However in roughtly 2008 hyundai/kia back spec'ed all 2.4L and 3.5l engines toward 40 weights regardless of model the engine was installed in.

From Kiatechinfo, hyundai provides a similar site. I have been on both.

My opinion is after a few engine failures (I had 2 failures in the 3.5L) the recommendation was changed. I also had a Hyundai Sonata with the 2.4L, I ran the car with 10w-30 and with 15w-40. The fuel economy was a bit better in warm weather with the 15w-40.


Looks like from this graph 20 grade is something to avoid in that engine.

 

[Cup of Joe]

Originally Posted By: demarpaint

Looks like from this graph 20 grade is something to avoid in that engine.


Prior to 2008 the graph was completely different. If you open the PDF for the owners manual it reads as I indicated.

Here is the PDF of the owners manual for a 2006 Optima 7-62 page 295 has the viscosity. https://www.kiatechinfo.com/local_viewer...openNewWindow=Y

The service information now reads as above.

 

[Cup of Joe]

Here is the the specs on amsoils site for the Kia amanti which I owned.

http://www.amsoil.com/mygarage/ProductRecommendations.aspx?FromIndex=1&url2=2004+KIA+AMANTI+S

For the optima with the 2.4L

http://www.amsoil.com/mygarage/vehiclelookup.aspx?url2=2004+KIA+OPTIMA+Q

 

[Cup of Joe]

Originally Posted By: friendly_jacek
Now, this is interesting indeed! Doe we know oil temps in the said Hyundai engines?


I don't believe the temps where any higher then expected in normal use. Naturally there was no announcement of a change in viscosity when it is to the thicker side.

 

[demarpaint]

Originally Posted By: TaterandNoodles
Here is the the specs on amsoils site for the Kia amanti which I owned.

http://www.amsoil.com/mygarage/ProductRecommendations.aspx?FromIndex=1&url2=2004+KIA+AMANTI+S

For the optima with the 2.4L

http://www.amsoil.com/mygarage/vehiclelookup.aspx?url2=2004+KIA+OPTIMA+Q


Certainly not a one size fits all for that year. I think having a choice is a good thing.

 

[Cup of Joe]

Originally Posted By: demarpaint
Certainly not a one size fits all for that year. I think having a choice is a good thing.


Absolutely! However if you compare it to the owners manual its very different from the original specification.

 

[demarpaint]

Originally Posted By: TaterandNoodles
Originally Posted By: demarpaint
Certainly not a one size fits all for that year. I think having a choice is a good thing.


Absolutely! However if you compare it to the owners manual its very different from the original specification.



Yes something prompted them to make some changes/revisions.

 

[HTSS_TR]

Most manufactures test their vehicles at 2 main places: Summer at Death Valley in California and Winter at International Falls in Minnesota. Death Valley, California in summer is the hottest place in USA(most summer months), it is normal to see high of the day at north of 120F. International Falls, Minnesota is also known as ice box of America (outside Alaska), it is not unusual to see south of -40F overnight in winter.

If the oil spec'ed are passing these two places then there is no reason to not use it anywhere in America(outside Alaska).