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#4508336 - 09/05/17 06:50 PM Kia 3.8L V6 - Lighter Grade Oil Better ?
ChrisD46 Offline


Registered: 09/10/10
Posts: 1903
Loc: GA.
I have a 2007 Kia Sedona 3.8L V6 (185K miles) , I believe there is a "semi - controversy" in terms of what grade oil (5W20 vs. 5W30) to use ?
Something about smaller oil passageways in this engine design show it performs best with 5W20 while others say since 5W30 is also suitable (listed in the OM) and can be considered suitable as well ... *What says you Kia engine experts ?
_________________________
2017 Hyundai Sonata 2.4L GDI 4 cylinder
2010 Hyundai Elantra 2.0L 4 cylinder
2007 Kia Sedona 3.8L 6 cylinder

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#4508339 - 09/05/17 06:56 PM Re: Kia 3.8L V6 - Lighter Grade Oil Better ? [Re: ChrisD46]
Charlie2015 Offline


Registered: 04/24/15
Posts: 241
Loc: Georgia
20w50 or bust laugh

Either one is fine... no big deal at all.
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1998 Honda Accord EX 2.3L Auto
2009 Scion TC Manual

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#4508356 - 09/05/17 07:11 PM Re: Kia 3.8L V6 - Lighter Grade Oil Better ? [Re: Charlie2015]
CharlieW618 Offline


Registered: 02/17/13
Posts: 76
Loc: Herrin, Illinois
Originally Posted By: Charlie2015
20w50 or bust laugh
Sounds like me. grin
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#4508376 - 09/05/17 07:35 PM Re: Kia 3.8L V6 - Lighter Grade Oil Better ? [Re: ChrisD46]
Jimzz Offline


Registered: 10/03/14
Posts: 1147
Loc: NoVA
I have a customer with an older 3.8 Hyundai. Last time I changed it I put in 10w30 HM oil. Runs perfect and he says he adds less oil now.

For GA I say at least 5w30 and 10w30 if it leaks/uses a fair amount of oil.
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#4508378 - 09/05/17 07:36 PM Re: Kia 3.8L V6 - Lighter Grade Oil Better ? [Re: ChrisD46]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
5W-30 is already a light oil. 5W-20 is for sub zero temperatures.

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#4508386 - 09/05/17 07:47 PM Re: Kia 3.8L V6 - Lighter Grade Oil Better ? [Re: Merkava_4]
tig1 Offline


Registered: 01/03/09
Posts: 13661
Loc: Illinois
Originally Posted By: Merkava_4
5W-30 is already a light oil. 5W-20 is for sub zero temperatures.


And +100F temps as well.
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2007 Ford Fusion 227,000 miles
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M1 10-30 in all OPE
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#4508391 - 09/05/17 07:50 PM Re: Kia 3.8L V6 - Lighter Grade Oil Better ? [Re: ChrisD46]
ndfergy Offline


Registered: 03/28/16
Posts: 418
Loc: burlington ,ontario, canada
For GF-5 oils with an HTHS range of 2.6 to 3.2 mpas I would always go with the highest regardless of what the owners manual states. Having said that, my friend has a Hyundai Accent circa 2007 who uses 5w20 dino with many successful miles. Use what you're comfortable with.
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#4508403 - 09/05/17 08:01 PM Re: Kia 3.8L V6 - Lighter Grade Oil Better ? [Re: ChrisD46]
bigj_16 Offline


Registered: 07/03/17
Posts: 1268
Loc: Douglas County, Colorado
Put in straight 50 weight for a few hundred miles, and it will stretch those oil passages right out smile

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#4508444 - 09/05/17 08:33 PM Re: Kia 3.8L V6 - Lighter Grade Oil Better ? [Re: ChrisD46]
Eddie Offline


Registered: 12/07/03
Posts: 9574
Loc: Florida, Cape Coral
Just use what the manufacture recommends and it is usually on the oil fill cap as well as in the owners manual. Ed
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#4508544 - 09/05/17 10:11 PM Re: Kia 3.8L V6 - Lighter Grade Oil Better ? [Re: bigj_16]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Originally Posted By: bigj_16
Put in straight 50 weight for a few hundred miles, and it will stretch those oil passages right out smile


approved

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#4508627 - 09/06/17 12:40 AM Re: Kia 3.8L V6 - Lighter Grade Oil Better ? [Re: ChrisD46]
FZ1 Offline


Registered: 02/07/08
Posts: 4727
Loc: Texas
So what oil are you using? Does it burn or leak,etc? What weight does the oil cap say?

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#4508672 - 09/06/17 03:20 AM Re: Kia 3.8L V6 - Lighter Grade Oil Better ? [Re: bigj_16]
AnthemBassMan Offline


Registered: 04/20/15
Posts: 217
Loc: T-County, Ohio
.

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#4508673 - 09/06/17 03:21 AM Re: Kia 3.8L V6 - Lighter Grade Oil Better ? [Re: bigj_16]
AnthemBassMan Offline


Registered: 04/20/15
Posts: 217
Loc: T-County, Ohio
Originally Posted By: bigj_16
Put in straight 50 weight for a few hundred miles, and it will stretch those oil passages right out smile


I had an old 1978 Pontiac Grand Prix with the dog 301 v8 in it. Near the end of its life, I was running Kendall GT straight 70 weight oil because the engine was so worn out.

L8R,
Matt
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2010 Chrysler Sebring Touring 168k
Castrol Magnatec 5w30/Fram Ultra filter

2017 Hyundai Elantra SE
16.2k

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#4508680 - 09/06/17 04:15 AM Re: Kia 3.8L V6 - Lighter Grade Oil Better ? [Re: ChrisD46]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2384
Loc: Balearic Islands , Spain
Your engine, and you probably won't notice any difference between a synthetic 5W-20 and 5W-30, simple as that.
_________________________
1975 Ford Capri II Ghia 3000 V6, - Valvoline VR1 20W-50
1988 Ford Escort MkIV 1.6 Xr3i Cabrio, - Shell Rimula R4X 15W-40 HDEO.

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#4508689 - 09/06/17 05:11 AM Re: Kia 3.8L V6 - Lighter Grade Oil Better ? [Re: ChrisD46]
ChrisD46 Offline


Registered: 09/10/10
Posts: 1903
Loc: GA.
Oil Cap = 5W20
**Any truth to this engine having "narrow" oil passage ways thus 5W20 is preferred ?
Will also note this engine has a timing chain (not a timing belt) if that matters .
_________________________
2017 Hyundai Sonata 2.4L GDI 4 cylinder
2010 Hyundai Elantra 2.0L 4 cylinder
2007 Kia Sedona 3.8L 6 cylinder

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