Automotive

Does OW20 oil minimize engine wear in the cold winters when cold starting?

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  • Dec 22nd, 2022 12:58 pm
[OP]
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Sep 4, 2016
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Does OW20 oil minimize engine wear in the cold winters when cold starting?

Compared to say 5W20. I used OW20 oil years ago but I stopped because it was literally double the cost of 5W20 in my oil changes. But when it's -100C is there really any oil that will flow immediately when cold starting?

It can''t be good for any engine to start it when it's this cold. Sounds rough even on my Honda, sounds like a dying rat.
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May 6, 2010
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for Honda probably not. I'm using 0w40 belgian castrol in my 3.2 Volvo engine that has somewhat interesting design, there's a difference compared to 5w30 OEM castrol or even 5w30 LiquiMolly.
[OP]
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Possum77 wrote: for Honda probably not. I'm using 0w40 belgian castrol in my 3.2 Volvo engine that has somewhat interesting design, there's a difference compared to 5w30 OEM castrol or even 5w30 LiquiMolly.
So don't bother with Ow20 oil?
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DiamondDallasPage wrote: Compared to say 5W20. I used OW20 oil years ago but I stopped because it was literally double the cost of 5W20 in my oil changes. But when it's -100C is there really any oil that will flow immediately when cold starting?

It can''t be good for any engine to start it when it's this cold. Sounds rough even on my Honda, sounds like a dying rat.
Yes, 0wXX synthetic offers better cold startup than 5wXX. I use it and feel it's worth it.
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I switched from 5W20 to 0W20 in my Ford Fusion.

No real reason why, other than it being the same price.
[OP]
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engineered wrote: Yes, 0wXX synthetic offers better cold startup than 5wXX. I use it and feel it's worth it.
But how much wear and tear does it save on the motor? Like how long does it take for Ow20 oil to start flowing vs 5W20?
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DiamondDallasPage wrote: But how much wear and tear does it save on the motor? Like how long does it take for Ow20 oil to start flowing vs 5W20?
There is no way or science to answer that question as the "wear and tear" on an engine is affected by too many things. Starts and stops, cold starts, hot starts idling times, high rpms and on and on and on.
The OEM engineers have taken all that and weather into account when they recommended what oil to use.
Do not over analyze or over think this.
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0w20 *can* provide better cold starting and decreased cold start wear compared to 5w20, but there's a lot more variables at play since oil operates at a bunch of different conditions.
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DiamondDallasPage wrote: But how much wear and tear does it save on the motor? Like how long does it take for Ow20 oil to start flowing vs 5W20?
How much faster do you want?
Do you really care about -100C?
What's more important is to let your engine warm up until idle drops, then drive off gently and don't drive hard until engine is at operating temperature.
If you're really worried, use a block heater or oil pan heating pad to pre warm your car before you drive.
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Oct 25, 2020
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Some manufacturers will suggest different oils for different conditions. It isn't uncommon to see multiple oil grades available.

Oils are also not created equal when it comes to flow rate at colder temperatures.

Project farm on YouTube did a test between a bunch of different oils and some brands flowed better at the extremes compared to others. Pennzoil Ultra platinum landed second behind amsoil signature overall and both were very close in cold weather flow.
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In order to answer this you'd need to compare 2 specific oils. No one can simply state '0w20 is better then 5w20 when cold starting'. That statement is based on feelings and not data.
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DiamondDallasPage wrote: So don't bother with Ow20 oil?
Stick with what your manual says. And use a block heater when you are in -100c, I assume you are in the west coast where it's -32c in Calgary today and may hit -35c tomorrow. Heck, even Vancouver is in negative double digits and snowed in.

I would say in most winter, you would have got away with it. But this is probably the earliest winter Calgary has seen for a long time but we always get a week or 2 -30c or lower temp every winter.

If your car stay outdoor, give it the best thing you can give to get over winter. What's $20-$30/year compare to worrying about engine wear?

Literally 5 Qts of Mobile 1 0w20 is only $33 as of this post and same price as 5w20.
https://www.canadiantire.ca/en/pdp/mobi ... 9453p.html

And how do you shop for your oil for 0w20 to be 2x cost of 5w20?
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My Honda Civic has 5W20 as the oil to use. I have been using 0W20 for 4 or 5 years and will continue to do so.
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0W16/0W20 is just an EPA thing.

Don't use it if you want your engines to last. Y'all be sipping too much of the OEM koolaid.

Stick with the European or Asian market owner's manuals, not North American.

I've worked in the past for an European manufacturer, did numerous tests, costing in the millions, if not billions and the results always came back the same.

Excessive piston scuffing and bearing wear for a 0.5 to 1% gain in fuel economy. Since the government and other authorities only care about fuel economy, they had to be released.
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Notsojdmgc4 wrote: 0W16/0W20 is just an EPA thing.

Don't use it if you want your engines to last. Y'all be sipping too much of the OEM koolaid.

Stick with the European or Asian market owner's manuals, not North American.

I've worked in the past for an European manufacturer, did numerous tests, costing in the millions, if not billions and the results always came back the same.

Excessive piston scuffing and bearing wear for a 0.5 to 1% gain in fuel economy. Since the government and other authorities only care about fuel economy, they had to be released.
It’s Canada. The body is shot before the engine goes the majority of the time anyways.
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Feb 13, 2021
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jonnycee1 wrote: It’s Canada. The body is shot before the engine goes the majority of the time anyways.
Maybe if you buy Japscrap and don't keep up with body maintenance, sure.
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Notsojdmgc4 wrote: Maybe if you buy Japscrap and don't keep up with body maintenance, sure.
or VW or MB..they're the new mazda's of rust..but luckily, they are usually scrapped before the body is too far gone because too $$$ to keep on the road. not really sure why VW is so bad with rust when Audi is relatively fine.

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