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Are 0w20 and 5w20 100% interchangeable? #5402849 04/14/20 10:09 AM
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jayjr1105 Offline OP
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Any exceptions? Assuming both are SN plus is there any reason you shouldn't run one or the other? It's understood that 0wXX is the better option for colder climates.

Last edited by jayjr1105; 04/14/20 10:09 AM.

2013 Mazda 3 - PP 0w20
2005 Honda Odyssey - PP HM 5w20
Re: Are 0w20 and 5w20 100% interchangeable? [Re: jayjr1105] #5402880 04/14/20 10:38 AM
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Davejam Offline
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They have different HTHS specifications which is important. So, No, not technically speaking.

Re: Are 0w20 and 5w20 100% interchangeable? [Re: jayjr1105] #5402881 04/14/20 10:38 AM
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atikovi Offline
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The owner's manual would be the place to look for the best choice. I assume 0w would give slightly better gas mileage.

Re: Are 0w20 and 5w20 100% interchangeable? [Re: atikovi] #5402884 04/14/20 10:41 AM
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jayjr1105 Offline OP
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Originally Posted by atikovi
The owner's manual would be the place to look for the best choice. I assume 0w would give slightly better gas mileage.

That's not true. A 0w20 can technically be thicker than a 5w20.


2013 Mazda 3 - PP 0w20
2005 Honda Odyssey - PP HM 5w20
Re: Are 0w20 and 5w20 100% interchangeable? [Re: jayjr1105] #5402893 04/14/20 10:48 AM
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atikovi Offline
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How so?

Re: Are 0w20 and 5w20 100% interchangeable? [Re: atikovi] #5402899 04/14/20 10:52 AM
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jayjr1105 Offline OP
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Originally Posted by atikovi
How so?

At operating temperature both are 20 grade oils and there's a range for 20 grade oils. Some are a tad thicker and some thinner. The number before the W has nothing to do with viscosity when the oil is hot. The 20 weight viscosity range is between 6.9 - 9.3 cSt. So technically a 5w20 can be 6.9 cSt @ 100c where a 0w20 can be 9.3 cSt @ 100c.


2013 Mazda 3 - PP 0w20
2005 Honda Odyssey - PP HM 5w20
Re: Are 0w20 and 5w20 100% interchangeable? [Re: jayjr1105] #5402905 04/14/20 10:57 AM
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ka9mnx Offline
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No, only difference is cold cranking. HTHS is the same for 0w-20 and 5w-20.


2005 Ranger 3.0 - SuperTech Syn 0w-20/Motorcraft
2000 4Runner 3.4 - SuperTech Syn 5w-30/Toyota
1997 B2500 Van 3.9 - M1 HM 10w-30/Mopar
1993 F150 4.9 - SuperTech Syn 5w-30/Motorcraft
Re: Are 0w20 and 5w20 100% interchangeable? [Re: atikovi] #5402911 04/14/20 11:01 AM
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stanlee Offline
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Originally Posted by atikovi
How so?


They are both 20w oils so at operating temp could be either.

Re: Are 0w20 and 5w20 100% interchangeable? [Re: Davejam] #5402913 04/14/20 11:02 AM
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NuttCase Offline
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Originally Posted by Davejam
They have different HTHS specifications which is important. So, No, not technically speaking.


Not necessarily. Both 0W-20 and 5W-20 have a minimum required HTHS of 2.3 mPa.s. as per SN Plus.

Many SN Plus oils meet the ACEA C5 spec (at least in europe) in which case the minimum HTHS is 2.6 mPa.s


'15 Merc C300 diesel hybrid, Shell Helix Ultra 0W30 ECT C3
'13 Ford Fiesta 1.25, Shell Helix Ultra 5W30AG
'17 Audi R8 V10, Motul 8100 X-Clean+ 5W30
'19 Mini JCW, Shell Helix Ultra 0W30 ECT C3
Re: Are 0w20 and 5w20 100% interchangeable? [Re: NuttCase] #5402922 04/14/20 11:13 AM
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ka9mnx Offline
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No, API minimum HTHS for all 20's is 2.6.


2005 Ranger 3.0 - SuperTech Syn 0w-20/Motorcraft
2000 4Runner 3.4 - SuperTech Syn 5w-30/Toyota
1997 B2500 Van 3.9 - M1 HM 10w-30/Mopar
1993 F150 4.9 - SuperTech Syn 5w-30/Motorcraft
Re: Are 0w20 and 5w20 100% interchangeable? [Re: jayjr1105] #5402951 04/14/20 12:06 PM
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All 0W20s are synthetic but not all 5W20s are.


Retired 6 yrs now & lovin' it
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic 1.8 LX
Re: Are 0w20 and 5w20 100% interchangeable? [Re: Char Baby] #5402957 04/14/20 12:15 PM
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Originally Posted by Char Baby
All 0W20s are synthetic but not all 5W20s are.


This. This is why the manual mandate 0w20 for 10k OCI so people won't put in 5w20 dino and blame it on the manufacturer.


"You keep asking questions PandaBear and you'll end up a vegetarian like my wife" - Camu Mahubah
Re: Are 0w20 and 5w20 100% interchangeable? [Re: Char Baby] #5402964 04/14/20 12:29 PM
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jayjr1105 Offline OP
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Originally Posted by Char Baby
All 0W20s are synthetic but not all 5W20s are.

I think Pennzoil and Motorcraft have a 0w20 syn blend.


2013 Mazda 3 - PP 0w20
2005 Honda Odyssey - PP HM 5w20
Re: Are 0w20 and 5w20 100% interchangeable? [Re: jayjr1105] #5402975 04/14/20 12:36 PM
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csandste Offline
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Originally Posted by jayjr1105
Originally Posted by Char Baby
All 0W20s are synthetic but not all 5W20s are.

I think Pennzoil and Motorcraft have a 0w20 syn blend.

Shouldn't respond before checking things out but....

Lots of syn-blend oils (5w-20 and 5w30 still market themselves as conventional because they have "syn-blend" brands marketing themselves at a higher price point.

Could these "syn blends" be all synthetic (i.e. group 3) and marketing themselves as syn blends because there's a "synthetic" at a higher price point?

It will be interesting to see how this all shakes out when SP oils hit. Lots of branding confusion ahead.


2017 Kia Soul+ Valvoline Daily Protection 5w30+ a bit of Harvest King syn 5w30-- 75,000 miles
Re: Are 0w20 and 5w20 100% interchangeable? [Re: jayjr1105] #5402993 04/14/20 12:56 PM
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My Toyota has used 0w-20, 5W-20, 5w-30 and 10w-30 if there was a difference it was undetectable.


2004 Corolla 140116
Out: Havoline Pro DS 10w-30 Purolator PureOne 10-29-19 136457
In: Pennzoil Platinum HM 5W-20 ST 4386
2006 Duramax 77077
Out: T6 5W-40 XG9100 73909
In: Rotella Dino PH9100 11-3-19
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