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#4592887 - 12/03/17 09:57 AM Why is syn 5W20 still sold if syn 0W20 is better?
wemay Offline


Registered: 04/04/12
Posts: 8876
Loc: Southeast Florida
-0W20 supposedly uses better base oils.
-In extreme cold, it flows better.
-They are equally priced.
-0W20 supposedly has better start-up protection.

The only thing i can see where 5w20 holds an edge, albeit a slight one, is in better Noack numbers.
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2017 Hyundai Sonata Sport 2.4L
2013 Hyundai Santa Fe Sport 2.0T
Valvoline

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#4592892 - 12/03/17 10:04 AM Re: Why is syn 5W20 still sold if syn 0W20 is better? [Re: wemay]
gregk24 Offline


Registered: 04/13/13
Posts: 5602
Loc: FL, USA
Some vehicles still require 5w20 per the owners manual.
_________________________
2012 Honda Accord EX-L K24z3
53,xxx miles
PPPP 0w20 / Fram Ultra

2014 VW Jetta SE 1.8T ea888
37,xxx miles
Castrol Edge 0w40 / OEM filter

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#4592893 - 12/03/17 10:05 AM Re: Why is syn 5W20 still sold if syn 0W20 is better? [Re: wemay]
Charlie2015 Offline


Registered: 04/24/15
Posts: 238
Loc: Georgia
Are you saying 5w20 is a bad product? If I have a car that takes x grade of oil, maybe I want to use x grade of oil.
_________________________
1998 Honda Accord EX 2.3L Auto
2009 Scion TC Manual

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#4592895 - 12/03/17 10:08 AM Re: Why is syn 5W20 still sold if syn 0W20 is better? [Re: Charlie2015]
wemay Offline


Registered: 04/04/12
Posts: 8876
Loc: Southeast Florida
Originally Posted By: Charlie2015
Are you saying 5w20 is a bad product? If I have a car that takes x grade of oil, maybe I want to use x grade of oil.


Not at all. Just thinking that because they're so close in performance, why both?

I myself use 5W20 but would have no issue using 0W either.
_________________________
2017 Hyundai Sonata Sport 2.4L
2013 Hyundai Santa Fe Sport 2.0T
Valvoline

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#4592903 - 12/03/17 10:17 AM Re: Why is syn 5W20 still sold if syn 0W20 is better? [Re: wemay]
Danh Offline


Registered: 10/16/10
Posts: 1750
Loc: .
5w-20 can be conventional, 0w-20 is typically a full synthetic. Some OEMs may specify 5w-20 to give owners and dealers a cheaper option.

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#4592904 - 12/03/17 10:18 AM Re: Why is syn 5W20 still sold if syn 0W20 is better? [Re: wemay]
tig1 Offline


Registered: 01/03/09
Posts: 13661
Loc: Illinois
It's all about the warranty. I use M1 0-20 and it has the Ford spec, but I pay little attention to manufacturer spec anyways.
_________________________
2007 Ford Fusion 227,000 miles
M1 0-20 EP
2017 Ford Fusion 49K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters


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#4592905 - 12/03/17 10:19 AM Re: Why is syn 5W20 still sold if syn 0W20 is better? [Re: Danh]
wemay Offline


Registered: 04/04/12
Posts: 8876
Loc: Southeast Florida
Originally Posted By: Danh
5w-20 can be conventional, 0w-20 is typically a full synthetic. Some OEMs may specify 5w-20 to give owners and dealers a cheaper option.


Excellent point. My assumption is this is most likely.
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2017 Hyundai Sonata Sport 2.4L
2013 Hyundai Santa Fe Sport 2.0T
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#4592917 - 12/03/17 10:37 AM Re: Why is syn 5W20 still sold if syn 0W20 is better? [Re: wemay]
wemay Offline


Registered: 04/04/12
Posts: 8876
Loc: Southeast Florida
...that makes sense from the OE pov, but why would the oil mfcs offer 5W20 in synthetic then? Why not a conventional (5w20) and a synthetic (0w20)?
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2017 Hyundai Sonata Sport 2.4L
2013 Hyundai Santa Fe Sport 2.0T
Valvoline

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#4592929 - 12/03/17 10:47 AM Re: Why is syn 5W20 still sold if syn 0W20 is better? [Re: wemay]
JohnnyJohnson Online   content


Registered: 10/22/09
Posts: 2742
Loc: Wet side WA
Even on the Subaru Website they tell you 5w-30 gives better protection in the first 10 minutes of start up. Isn't that were they claim 25% of engine wear occurs?

https://www.patriotsubaru.com/synthetic-oil.htm
_________________________
2004 Toyota Corolla 121707
Out: QSUD 5W-30 Purolator One 5030
In: Valvoline ML 5w-30 TG4967 117530 2-8-18
2006 Duramax 74047
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73752 4-22-18

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#4592930 - 12/03/17 10:48 AM Re: Why is syn 5W20 still sold if syn 0W20 is better? [Re: wemay]
JustN89 Offline


Registered: 06/27/17
Posts: 472
Loc: DFW
In my opinion, the two are interchangeable. If I'm running synthetic, I don't see a reason to use 5W over 0W, all things being equal. However, price and warranty considerations should be accounted for. As I said in another thread, I picked up some Mobil 1 0W-20 AFE on sale ($19.99) which I will run in my Elantra next OCI, though my manual calls for 5W-20.

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#4592932 - 12/03/17 10:51 AM Re: Why is syn 5W20 still sold if syn 0W20 is better? [Re: wemay]
wemay Offline


Registered: 04/04/12
Posts: 8876
Loc: Southeast Florida
I recently bought Idemitsu 0W30 on clearance as well.
_________________________
2017 Hyundai Sonata Sport 2.4L
2013 Hyundai Santa Fe Sport 2.0T
Valvoline

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#4592944 - 12/03/17 11:01 AM Re: Why is syn 5W20 still sold if syn 0W20 is better? [Re: wemay]
turnbowm Offline


Registered: 05/14/15
Posts: 150
Loc: So. Calif.
While the car is under warranty, I always follow the Owners Manual when it comes to oil spec and grade. Not going to give the manufacturer a reason/excuse to deny a warranty claim.
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2015 Kia Optima EX 2.4L GDI
2015 Chevy Volt

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#4592951 - 12/03/17 11:10 AM Re: Why is syn 5W20 still sold if syn 0W20 is better? [Re: wemay]
Patman Offline



Registered: 05/27/02
Posts: 20341
Loc: Oakville, Ontario
I feel the same way about 10w30. I feel it's an obsolete viscosity now that 5w30 is well established, however 10w30 is probably the biggest selling viscosity in the history of motor oil so it may never go away. So in a similar vein we may never see 5w20 go away either.
_________________________
2018 Corvette (M1 5w30 ESP & Fram Ultra)
2006 Civic EX Coupe (PUP 5w20 & Fram Ultra)
2010 BMW 328i X-Drive (GC 0w40 & Mann)


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#4592955 - 12/03/17 11:13 AM Re: Why is syn 5W20 still sold if syn 0W20 is better? [Re: wemay]
Alex_V Offline


Registered: 04/10/16
Posts: 1155
Loc: Campbellsville, KY
Seems to me the answer is "We just aren't there yet."

Like 10w40 vs. 10w30 - how many years did the two exist before (just recently) '40 started getting harder to find and fewer different options? 0w20 is, what, 5 years old? I can see the merit of the options basically being 5w20 conventional/syn blend with 0w20 as an almost universally cross-compatible full syn, but some folks (me included, at times) are gonna hang on to their 5w.
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I like Chevy and Valvoline.

'13 Cruze, 1.4T, 112K
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#4592959 - 12/03/17 11:18 AM Re: Why is syn 5W20 still sold if syn 0W20 is better? [Re: wemay]
Garak Offline


Registered: 12/05/09
Posts: 24574
Loc: Regina, Saskatchewan, Canada
Originally Posted By: wemay
The only thing i can see where 5w20 holds an edge, albeit a slight one, is in better Noack numbers.

Greg's reasoning is sound, at least behind the marketing. Most of us here know a 0w-20 works in most 5w-20 applications. Some people won't deviate, though, and some oil companies won't let their recommendations deviate outside the automakers' recommendations, either.
_________________________
Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, NAPA Gold 7356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515

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