Should I run 5w-30 or 5w-40 or.....?

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Mar 17, 2008
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Michigan
So my Turbo Hyundai recommends 5w-30. However it also says I can use 5w-40. But of course they now have 0 weight oils too.

Since Michigan usually never gets extremely cold or extremely hot on a normal basis, would a 0 or 40 weight oil really be necessary or have any real advantages? Any real disadvantages?

Please make your case as I am wavering on the fence about switching.
 
As a close-by neighbor who also owns the same vehicle badge name as you - same suspect four cylinder engines of S. Korean descent also, I recommend thick 0w30s (winter) and thin 0w40s (summer) in SP cert.

I have tried Castrol Edge Euro 5w40 and Quaker State Euro 5w40 Syns SPs in our Kia 2.0. Both eliminated small consumption issues I had with thin oils of the past. But the engine sure wasn't quieter using either one. Normally increasing viscosity levels by 2-3 numbers does quiet things. I was shocked it didn't.

When purchasing whatever oils you buy, pay attention to the back of the jug (SP). 2nd most important with your turbo engine is buying mid or premium fuels.
I tried Costco and Sam Club fuels in both our Hyunkias. I got a free Christmas-time membership to BJ's. I use their Premium and both vehicles run really well on it........ no hesitation after turns around corners. No hesitation when accelerating from 30 to 55 MPH in a hurry.
The tankers I've seen there are the same ones I see at BP stations around town. I'm guessing the additive level is less (judging by price). But I still use 20oz Chevron Concentrated Techron Cleaner every 3k in my gas tank and I clean the intake every 12k with specialized spray.
 
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The good news is that a high quality synthetic 5W-40 will provide a higher HTHS than just about any 5W-30. This is exactly what some highly stressed turbocharged engines need. Whether your engine is in this category or not, I can't say. Generally, there is no downside to the change.
 
The good news is that a high quality synthetic 5W-40 will provide a higher HTHS than just about any 5W-30. This is exactly what some highly stressed turbocharged engines need. Whether your engine is in this category or not, I can't say. Generally, there is no downside to the change.
I don't see it getting highly stressed. We are old fogeys.
 
So my Turbo Hyundai recommends 5w-30. However it also says I can use 5w-40. But of course they now have 0 weight oils too.

Since Michigan usually never gets extremely cold or extremely hot on a normal basis, would a 0 or 40 weight oil really be necessary or have any real advantages? Any real disadvantages?

Please make your case as I am wavering on the fence about switching.
Just as in your other thread, being in Michigan, outside, and short-tripped, personally I would use a 0w30 at minimum, 0w40 if you find >3% fuel dilution at your 5k intervals. I went with Premium Plus 0w30 in my new Ascent; mainly because it’s my wife’s first turbo vehicle and I’m not yet convinced she will always remember to give the engine ~30 seconds to circulate oil before driving off.

In reality, HPL PCEO 5w30 was anlready more than capable according to Dave (it’s used in thousands of fleet 3.5EBs for 15-20k OCIs and zero failures), and I’m fairly sure @Pablo would steer you towards the SS 0w30 if you’re not concerned about cost. If you want a shelf oil, nothing has changed here either… go grab Mobil 1 FS 0w40. Any of those oils should be more capable than your engine ever needs.
 
Just as in your other thread, being in Michigan, outside, and short-tripped, personally I would use a 0w30 at minimum, 0w40 if you find >3% fuel dilution at your 5k intervals. I went with Premium Plus 0w30 in my new Ascent; mainly because it’s my wife’s first turbo vehicle and I’m not yet convinced she will always remember to give the engine ~30 seconds to circulate oil before driving off.

In reality, HPL PCEO 5w30 was anlready more than capable according to Dave (it’s used in thousands of fleet 3.5EBs for 15-20k OCIs and zero failures), and I’m fairly sure @Pablo would steer you towards the SS 0w30 if you’re not concerned about cost. If you want a shelf oil, nothing has changed here either… go grab Mobil 1 FS 0w40. Any of those oils should be more capable than your engine ever needs.
Thanks.
 
PCMO 0W or 5W oils will be fine. Why spend the money on a botique oil when not needed by your planned useage and oil change routine.
 
PCMO 0W or 5W oils will be fine. Why spend the money on a botique oil when not needed by your planned useage and oil change routine.
Peace of mind? What would be your choices for normal syn oil?
 
So my Turbo Hyundai recommends 5w-30. However it also says I can use 5w-40. But of course they now have 0 weight oils too.

Since Michigan usually never gets extremely cold or extremely hot on a normal basis, would a 0 or 40 weight oil really be necessary or have any real advantages? Any real disadvantages?

Please make your case as I am wavering on the fence about switching.
Michigan doesn't get extremely cold?

How hard is the turbo on oil in this particular engine?

You want good deposit control.

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@BrendanC already suggested HPL HDEO 5w40. Its probably the best oil you will ever find and the best choice that your engine which is known to explode to live its best life before it does explode because its an engine known to explode. Rest easy and good luck.
 
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