5W20 in summer?

[Ken2]

Quote:
my personal mechanic suggests sticking with 5w-20 year round due to the closer tolerances and tight oil pathways in Hyundai's newer motors. Not sure if that's fact or myth.
Myth. As stated above, tolerance is the allowable error in the dimensions. Your mechanic probably meant clearances, and how does he know?

I'd use an xW-30 in your heat. Other things equal, higher viscosity gives higher film strength in the bearings.

That said, a gas turbine, really hot, uses an oil that is about 5 weight. I'd still use the xW-30.

 

[barkingspider]

5w-20, 5w30 and 10w30 will be fine during Texas summers

 

[KCJeep]

Originally Posted By: kschachn
You've seen them on here?

And if the ones you have seen are not impressive was it due to the oil viscosity?

Originally Posted By: KCJeep
Not impressed with some UOAs in Hyundai/KIA engines on 5w20.


Yes and one of them was mine. I have no idea if it was the grade but thats a great place to start to find out IMO. My next one from our KIA will be on a 5w30 and it will be interesting to see if there is an improvement.

 

[Errtt]

I've run 5w-20 (PP & Kendall synthetic) and 5w30 (PP) in my 2010 Hyundai 2.4L and could not tell any difference.

 

[ChrisD46]

What exactly are you not impressed with ?
Originally Posted By: Texican
Originally Posted By: KCJeep
Not impressed with some UOAs in Hyundai/KIA engines on 5w20. Since your in TX, have a GDI engine and the manual/warranty allows 5w30 I can't imagine any reason to run a 5w20. JMO.


Since I like using synblends, with the 5W30 I have the pennzoil blend with 50% synthetic as an option and the GTX blend 5W30 has 50% synthetic as well. The 5W20 GTX blend only has 10% and I haven't seen the pennzoil blend in 5W20 anywhere.

 

[Merkava_4]

If it was me, I'd run the thickest oil the manufacturer allows.

 

[Bud]

I use 5w-20 synthetic in my truck. Never a problem and it gets plenty hot in the Houston area. But a 5w30 wouldn't hurt anything either. The 5.4 is a tough engine.

 

[zogg]

I have a2013 Ram 2500 hemi, and 5w20 is the recommended oil. However, the owners manual says to use 5w30 if the gross weight of the truck pulling a trailer is over 14,000. That is exactly where I am at when towing my 8,000 pound trailer.
I emailed Chrysler to verify and they said because my engine does not shut down the four cylinders to save fuel, I can use 5w30 all the time so that I don't have to change oil when not towing.
So,I plan on using 5w20 all winter and switch to 5w30 for the towing season.....I also kept the email just in case there is ever any oil related issues.....

 

[kschachn]

Isn't that something.

Originally Posted By: Merkava_4
If it was me, I'd run the thickest oil the manufacturer allows.

 

[Clevy]

Originally Posted By: zogg
I have a2013 Ram 2500 hemi, and 5w20 is the recommended oil. However, the owners manual says to use 5w30 if the gross weight of the truck pulling a trailer is over 14,000. That is exactly where I am at when towing my 8,000 pound trailer.
I emailed Chrysler to verify and they said because my engine does not shut down the four cylinders to save fuel, I can use 5w30 all the time so that I don't have to change oil when not towing.
So,I plan on using 5w20 all winter and switch to 5w30 for the towing season.....I also kept the email just in case there is ever any oil related issues.....



Mds works fine whether you use a 5w-20 or a 0w-40. I've used both and mds works just fine with either.
As far as towing my 2004 ram was fine with 5w-20 towing cars and rv's across the country. It had 270k when I totalled it. Used bulk dealer 5w-20 changed when the dealer told the previous owner to change it.
Use whichever grade you're most comfortable with. It really doesn't matter. That truck has coolers for all the fluids so if it won't affect warranty go thicker if you like.
I for one always felt thicker was better however I'm learning otherwise.