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Re: 0W-20, switch to something thicker? [Re: Fifty150] #5099940 05/08/19 07:51 PM
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4WD Online Confused
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Re: 0W-20, switch to something thicker? [Re: sasilverbullet] #5099973 05/08/19 08:19 PM
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benjy Offline
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in your heat a 10-30 synthetic would be better, thinner base oils used to meet 0+5w are not necessary in hotter climates + they tend to burn off faster + require more viscosity improvers to reach their running temperature viscosity. unless of course you use a real synthetic, as a 30W PAO meets the 10W without any viscosity improvers + of course ester oils would do the same

Re: 0W-20, switch to something thicker? [Re: sasilverbullet] #5100000 05/08/19 08:46 PM
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vq40 Offline
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So climate has nothing to do with the viscosity. Thinner oil is better due to it dissipates heat way better than thicker, lower drag, flows better, and with today’s engines the oil pump is a low volume oil pump designed for 0w20 oil, oil won’t flow correctly with the thicker oil. Do yourself a favor and follow what that owners manual says.

Re: 0W-20, switch to something thicker? [Re: vq40] #5100008 05/08/19 08:50 PM
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demarpaint Offline
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Originally Posted by vq40
So climate has nothing to do with the viscosity. Thinner oil is better due to it dissipates heat way better than thicker, lower drag, flows better, and with today’s engines the oil pump is a low volume oil pump designed for 0w20 oil, oil won’t flow correctly with the thicker oil. Do yourself a favor and follow what that owners manual says.

"Thicker" oil won't flow correctly in an 2014 Accord with 90K miles on it? I'd be willing to bet 0W30 would flow just fine in that engine. Probably just as good as 0W20 would.


God Bless Our Troops

Re: 0W-20, switch to something thicker? [Re: sasilverbullet] #5100013 05/08/19 08:53 PM
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Coastie05 Offline
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Stick with the 0W20. That's what the manufacturer says to run, so do that. It has worked for you for 90k miles. I run it in both my Honda's in South Texas with no issues.


2018 Honda Pilot EX AWD
2013 Honda CRV EX
2014 Honda Civic LX (sold)
2001 Acura Integra GSR (sold)
Re: 0W-20, switch to something thicker? [Re: vq40] #5100027 05/08/19 09:01 PM
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OVERKILL Offline
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Originally Posted by vq40
So climate has nothing to do with the viscosity.

Climate can have a significant impact on viscosity. That's why it was, before CAFE, pretty much standard to have viscosity tables in owner's manuals, which you still see in most other parts of the world. That's why you don't run 20w-50 in Winnipeg in January.

Originally Posted by vq40
Thinner oil is better due to it dissipates heat way better than thicker,

Talk about hyperbole. Thinner oil takes away heat SLIGHTLY better than a heavier oil. The difference is so small it is barely worth mentioning. Contrarily, heavier oil heats up faster (marginally) than thinner oil because the action of shearing generates heat.

Originally Posted by vq40
lower drag,

Slightly lower drag, yes.
Originally Posted by vq40
flows better,

Given that oil pumps are positive displacement, that's incorrect. Actually, a thinner oil will have more "slip" in the oil pump and, if the relief is not open, actually flow LESS.

Originally Posted by vq40
and with today’s engines the oil pump is a low volume oil pump designed for 0w20 oil, oil won’t flow correctly with the thicker oil.

That's completely backwards. Thinner oils require more volume to make up for increased side leakage. This is why thinner oils result in lower oil pressure. Engines that spec thinner oils typically have HIGHER volume pumps.

Originally Posted by vq40
Do yourself a favor and follow what that owners manual says.

That, we can agree on. It is always a safe bet to follow the verbiage laid out in the manual.


2019 RAM 1500 Sport - Mobil 1 EP 0w-20, FRAM Ultra
2020 Grand Cherokee SRT - Ravenol SSL 0w-40, FRAM Ultra
Re: 0W-20, switch to something thicker? [Re: sasilverbullet] #5100044 05/08/19 09:17 PM
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More 🛥🎣


2017 Mazda CX5
Valvoline Advanced Synthetic 0w20
Roki OEM filter.
Re: 0W-20, switch to something thicker? [Re: PimTac] #5100049 05/08/19 09:24 PM
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bbhero Offline
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Originally Posted by PimTac
More 🛥🎣



A good day for it I see LOL

A cold front approaching and the bass are just off the spawning beds ready to eat LOL


Nissan Altima 3.5 Coupe
Cam2 Full synthetic 5w30 Carquest Blue 84356
"Treat your family like your friends and treat your friends like your family."
Re: 0W-20, switch to something thicker? [Re: sasilverbullet] #5100057 05/08/19 09:36 PM
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ozric Offline
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My 2011 Mazda3 lists 0w-20 in the manual. The 2010 with same engine listed 5w-20 in its manual. The UK manual for my car had the old style temperature range graphic with everything from 0w-20 to 20w-50 listed, depending on the temp. I'm sure I could have used 5w-30 with no issue, but I have used 0w-20 with no problems.

Re: 0W-20, switch to something thicker? [Re: sasilverbullet] #5100075 05/08/19 09:47 PM
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aquariuscsm Offline
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For example,The 2014 2.4 Russian Honda Accord's owner's manual specs 0W30 or 5W30.

The Honda K24 was not built around a W20 oil. It's only the US spec.


1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Quaker State Ultimate Durability 0W20

Re: 0W-20, switch to something thicker? [Re: Fifty150] #5100083 05/08/19 10:02 PM
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Garak Offline
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Originally Posted by Fifty150
Stop right there. None of the opinions on the internet, are from engineers who built your car. Your engine is suppose to use an oil grade specified by the engineers who built your car. Stay with that recommendation.

I have no problems with the notion of following the manual recommendations. I do have a great deal of difficulty believing that the oil recommendation was written by an engineer. I have even more difficulty believing the doom and gloom wording and dire warnings in many manuals (and internet posts) that engines are so viscosity sensitive that only one viscosity of oil can be used year round and in all climate and usage conditions. And this is coming from someone who will almost never consider using an oil that cannot be used year round.

The viscosity of oil that the engine experiences from a cold start to hot running is a far wider swing than anything we can throw at it by way of any sensible viscosity choice (in other words, not SAE 40 in -40). The notion that a 5w-30 A5/B5 cannot or should not be used in place of an API 0w-20 is nothing more than silly. Cripes, the difference in HTHS between M1 0w-20 and an ILSAC 5w-30 is less than the difference in HTHS between an ILSAC 5w-30 and an E6 5w-30, both of which fit within my engine's manual requirements.

If someone is concerned about manual requirements from a warranty perspective, or simply wants to follow OEM directions verbatim, that's fine. I just don't see a big worry over selecting an oil an the identical additive package that happens to have HTHS bumped up by 0.2. That's nutty and OCD even by BITOG standards.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: 0W-20, switch to something thicker? [Re: sasilverbullet] #5100091 05/08/19 10:16 PM
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In my 2013 Accord with the 2.4L, I prefer to use a 5w-20 full synthetic. I like it when the engine is more quiet, and I don't need a zero weight in Florida.


Porgy Tirebiter: "Heavy on the 30 weight, Mom."
2017 Toyota Camry XLE, 12K, 2nd owner
2007 Honda Ridgeline RTS, 96K, original owner
2007 Infiniti M35, 115K, original owner
Re: 0W-20, switch to something thicker? [Re: Garak] #5100212 05/09/19 04:07 AM
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Fifty150 Offline
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Originally Posted by Garak
I have even more difficulty believing the doom and gloom wording and dire warnings in many manuals (and internet posts).



All tongue in cheek, and in fun. If you read the internet, and believe everyone who is always posting the same things.......without independent findings, validated published results, or any science & logic! Every fan of whichever manufacturer, will repeatedly post over & over again, to stick to the OEM everything. For anything and everything! Only use Honda transmission fluid. Only use Ford MotorCraft spark plugs. Never use an AC Delco anything under the hood of a Japanese car. Amsoil fans who drank the Kool-Aid. Look at how many people are against Fram filters, and how many people swear by K&N Filter. Even Hyundai owners who will only use Hyundai oil filters. You can't do any better than Hyundai. Unforgivable to use Denso under the hood of a Ford; even if Denso is the producer of the OEM part.

The entire automotive aftermarket world may as well not exist - except for Amsoil, of course. And K&N Filters.

Re: 0W-20, switch to something thicker? [Re: sasilverbullet] #5100253 05/09/19 06:01 AM
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I would prefer the 5w20 option. Same viscosity at operating temps and would do well year round in San Antonio. I live in Central Iowa and would use a 5w20 year round. A lower NOACK than a 0w20.


Freedom is not about having the choice to do what you want, but the choice to do what you ought.
Re: 0W-20, switch to something thicker? [Re: TiredTrucker] #5100310 05/09/19 07:32 AM
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LEADED Offline
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Nowadays Manufacturers that require 0w 20 PCMO , most likely have a heat exchanger incorporated . Stay course till warranty expire .

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