Keep us running!
Order HD Helmet HERO at GoPro.com
 
Next Event: AAS Round 1
  
  
Home » Bay Area Autocross Forum » Tech/Setup » Kia GDI engine calls for 5w-30. Do I have to?
Kia GDI engine calls for 5w-30. Do I have to? [message #121494] Tue, 13 February 2018 23:03 Go to next message
atcovan is currently offline  atcovan   
Messages: 3059
Registered: December 2006
Location: North Highlands
Top Time of Day
CONTRIBUTOR

From: *lightspeed.frokca.sbcglobal.net
My new Kia Sedona has a normally aspirated GDI V6 and calls for 5w-30 oil, but I have several quarts of 5w-20 synthetic on hand. Is there a problem using the "lighter" oil, such as sucking it past the guides and getting into the PCV system and fouling the intake valves? I plan to use the super-duper CRC intake cleaner every 10k miles, so is this even an issue?

PS Should I change the oil before, or after the intake and valve cleaning process?


Jim

[Updated on: Tue, 13 February 2018 23:06]

Report message to a moderator

Re: Kia GDI engine calls for 5w-30. Do I have to? [message #121495 is a reply to message #121494] Wed, 14 February 2018 07:23 Go to previous messageGo to next message
G_Ride is currently offline  G_Ride   
Messages: 931
Registered: April 2011
Location: Campbell
Top PAX

From: *dedicated.static.sonic.net
I'd be more worried if 5w20 will be able to provide enough lubrication more than anything else.

--Erik
2013 Subaru BRZ
68 STX
Re: Kia GDI engine calls for 5w-30. Do I have to? [message #121496 is a reply to message #121494] Wed, 14 February 2018 10:17 Go to previous messageGo to next message
Impala SS AutocroSSer   United States
Messages: 2819
Registered: September 2005
Location: San Jose CA
Top Time of Day
CONTRIBUTOR

From: *static-ip.telepacific.net
atcovan wrote on Tue, 13 February 2018 23:03
My new Kia Sedona has a normally aspirated GDI V6 and calls for 5w-30 oil, but I have several quarts of 5w-20 synthetic on hand. Is there a problem using the "lighter" oil, such as sucking it past the guides and getting into the PCV system and fouling the intake valves? I plan to use the super-duper CRC intake cleaner every 10k miles, so is this even an issue?

PS Should I change the oil before, or after the intake and valve cleaning process?



So you're debating saving $20 or so on oil ONE TIME versus potentially screwing up a vehicle worth tens of thousands of $$$...

Re-read that and I think you'll figure it out Wink


Ed Runnion

2016 Scion FR-S, SSC 116 "CU TGERS"
1996 Chevy Impala SS, CP 63 "T56 SS"

Former : HS Fiesta ST, DS/FS Genesis Coupe, STC Civic Si, STS Acura Integra, STX Subaru WRX Wagon
Re: Kia GDI engine calls for 5w-30. Do I have to? [message #121498 is a reply to message #121496] Wed, 14 February 2018 11:09 Go to previous messageGo to next message
atcovan is currently offline  atcovan   
Messages: 3059
Registered: December 2006
Location: North Highlands
Top Time of Day
CONTRIBUTOR

From: *lightspeed.frokca.sbcglobal.net
Thanks, guys. I was worried about preserving my warranty, too. Good advice to stick with the recipe Kia calls for. I'll change the oil and filter after the cleaning, too.

Jim
Re: Kia GDI engine calls for 5w-30. Do I have to? [message #121499 is a reply to message #121498] Wed, 14 February 2018 11:34 Go to previous messageGo to next message
red5racing is currently offline  red5racing   United States
Messages: 557
Registered: May 2008
Location: Los Altos
Sixth Gear

From: 12.33.222*
Be thankful you don't have a new Camry. It requires 0w16.

Re: Kia GDI engine calls for 5w-30. Do I have to? [message #121500 is a reply to message #121499] Wed, 14 February 2018 11:49 Go to previous messageGo to next message
G_Ride is currently offline  G_Ride   
Messages: 931
Registered: April 2011
Location: Campbell
Top PAX

From: *dedicated.static.sonic.net
Since Toyota calls out 0w16, I don't see a problem as long as it does its job

--Erik
2013 Subaru BRZ
68 STX
Re: Kia GDI engine calls for 5w-30. Do I have to? [message #121502 is a reply to message #121498] Wed, 14 February 2018 13:34 Go to previous messageGo to next message
pault1 is currently offline  pault1   United States
Messages: 884
Registered: October 2005
Location: San Remote
Top PAX
CONTRIBUTOR

From: *hsd1.ca.comcast.net
Agreed, better changing it after the cleaning as whatever might have ended up in the engine will get taken out sooner rather than later.

FWIW I use 10W-30 synthetic instead of the recommended 5W-30 because I never am in climates of <25 degrees, and in general a narrower range of ratings means fewer viscosity modifiers were necessary to get the oil to perform at both tested viscosity ranges.

As Ed implied, the engine is going to spend most of its life at the warm end where the 20 or 30 are important factors in bearing clearance and design.

You would be OK, IMO, in using the 5W-20 as "top up" material between oil changes, as long as you don't add more than a quart or so between changes.


Paul T. Ford body, Yamaha power - describes my car pretty well, too! Smile Returned to racing the STi-STU but still that #35 you love
Re: Kia GDI engine calls for 5w-30. Do I have to? [message #121504 is a reply to message #121502] Wed, 14 February 2018 13:45 Go to previous messageGo to next message
G_Ride is currently offline  G_Ride   
Messages: 931
Registered: April 2011
Location: Campbell
Top PAX

From: *dedicated.static.sonic.net
I disagree. You don't know if using 5w20 isn't causing problems unless you perform an oil analysis and oil pressure (too low and too high can be a problem)

--Erik
2013 Subaru BRZ
68 STX
Re: Kia GDI engine calls for 5w-30. Do I have to? [message #121510 is a reply to message #121504] Wed, 14 February 2018 17:24 Go to previous message
atcovan is currently offline  atcovan   
Messages: 3059
Registered: December 2006
Location: North Highlands
Top Time of Day
CONTRIBUTOR

From: *lightspeed.frokca.sbcglobal.net
Thanks, Paul. I have experimented with 0w-20 in another problematic car which called for 5w-20 and it cured the bearing clatter at startup. I believe the 0w flowed more freely and got to where it needed to be sooner. Where I live, it rarely get's below 30 degrees, so I don't worry about cold flow, just getting it there quicker. Ultimately, all oils end up approx 10 once warmed up. I use "full" synthetic and change at 5k miles, so the additive package probably doesn't suffer from viscosity range fatigue. I don't see the advantage of 100% syn for a passenger car, tho, I used the high-zoot stuff in the racer.

Jim
Previous Topic: BRZ Alignment C-Street
Next Topic: Who's a good Porsche Alignment person near Walnut Creek?
Goto Forum:
  


Current Time: Tue Aug 14 03:53:29 PDT 2018

Total time taken to generate the page: 0.01103 seconds