Nobody Special
New member
:twitch:
https://www.redlineoil.com/heavy-shockproof
(This stuff helped tremendously in my Rover D1):thumb3:
Oil viscosity
- Thread starter Nuke
- Start date
:twitch:
https://www.redlineoil.com/heavy-shockproof
(This stuff helped tremendously in my Rover D1):thumb3:
delloro
New member
Surprised we haven't had the suggestion of adding Seafoam yet!
It's too viscous compared to factory 0w oil.
Nobody Special
New member
Surprised we haven't had the suggestion of adding Seafoam yet!
Seafoam is good for 2 cycle engines.
Pretty much useless compared to other products in the price range.
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It's been said before, but I'll repeat it:
Thinner oils are for mpg and CAFE, and offer less protection. [insert discussion about how additives take over when the film strength is insufficient here, with counter argument about how additives ultimately fail and also get depleted]
Also, manufacturers' vehicles get tested for mpg, and whatever oil they used for the testing MUST be the only oil recommended in the owners' manual.
But don't take my word for it, check out this EPA document. It's old but still applicable, sorry I don't have any updates:
Thinner oils are for mpg and CAFE, and offer less protection. [insert discussion about how additives take over when the film strength is insufficient here, with counter argument about how additives ultimately fail and also get depleted]
Also, manufacturers' vehicles get tested for mpg, and whatever oil they used for the testing MUST be the only oil recommended in the owners' manual.
But don't take my word for it, check out this EPA document. It's old but still applicable, sorry I don't have any updates:
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Nobody Special
New member
patkelly4370
New member
I drive (up until my 17 4runner) older vehicles. 30 to 50 years old. So I am used to 'more forgiving' tolerances.
In a pinch, the wrong oil is better than no oil. The right oil is better than the wrong oil.
As specific as the engineering is on the 5th gen, why not run what the engine was designed to use?
The straight six in my 68 F100 doesn't have variable valve timing mechanisms and other such systems that are probably oil specific.
Do you want to use ATF in your differentials? Gear oil in the radiator?
Where I live we have a 100° temperature swing summer to winter. I want my 4runner to last as long as possible. I'll use what the engineers recommend. They're smarter than me.
Sent from my SM-G955U using Tapatalk
In a pinch, the wrong oil is better than no oil. The right oil is better than the wrong oil.
As specific as the engineering is on the 5th gen, why not run what the engine was designed to use?
The straight six in my 68 F100 doesn't have variable valve timing mechanisms and other such systems that are probably oil specific.
Do you want to use ATF in your differentials? Gear oil in the radiator?
Where I live we have a 100° temperature swing summer to winter. I want my 4runner to last as long as possible. I'll use what the engineers recommend. They're smarter than me.
Sent from my SM-G955U using Tapatalk
Nobody Special
New member
Designed to use?
Or mandated for mileage quotas?
Simple browsing of manuals of the *same* engine around the world dictate different viscosity.
It is designed to use from 0W20 to 20W50. That is the acceptable ranges of oil viscosity, within specific ambient temperatures for the Dual VVT-i 1GR-FE.
The fact that Toyota mainly recommends 0W20 for the USA, is because of our CAFE regulations.
CutthroatSlam
Senior Member
Another OEM oil OCD thread. Just turned 245K miles on our 2014 SR5 4Runner that's seen nothing but aftermarket synthetic 0w20 motor oil, 75w90 gear oil for the front and rear differentials and transfer case, synthetic ATF for the transmission. Never an issue.
ElectroBoy
Banned
0w-20 is CAFE, and the owner's manual is no longer written solely by the engineers. Manufacturers are required to recommend only the oil that was used in gov't mpg tests. Since 0w-20 does give a (very) small increase in mpg the corporations save a bunch of money on gov't penalties and such.
Currently using 5w-30 with no apparent change in how it runs or starts. Will be trying 5w-40 in a year or so. I've read the owner's manual and it says something to the effect that a thicker oil is required for high speed, mountains, towing etc. I'll pull an excerpt if anyone wants, but it is in your manual as well.
But don't take my word for it, here's a page out of the Australian manual for our engines:
Thanks for pulling up that Aus oil chart. But it makes no sense to me. Why would a 10W-30 cover up to 100+ F, but a 5W-30 only to 50F?
If a multi-grade oil is formulated to be 30 weight at the normal hot engine operating temperature, that 5W-30 ought to go up to 100+ like the 10W-30.
I agree 5w-30 should be good up to the same temp as 10w-30. I'm sure the charts are conservative, (for example 5w-30 is good up to 80F) but there's a few things I can think of:
A 10w-30 is generally robust; in fact (for example) Amsoil's SS 10w-30 was originally created as a straight 30, but due to the quality of the oil meets the requirements of a 10w.
Shear stability is included in this; with a smaller spread between the lower rating and upper, in general you get a more stable oil that will remain in grade and not shear down, or thin, as it is run it in an engine.
Then there's also volatility; a thinner oil will vaporize at a lower temperature, so the thicker 10w-30 will tend to not burn off as quickly as a 5w-30 will when oil temperatures get really high.
Back around 2000, a 5w-30 was comparatively weak compared to a 10w-30, so there may still be that perception, although the gap has narrowed in the last 20 years. Keep in mind the chart I posted was at least 8-10 years old.
Nobody Special
New member
Yes, because it has an even wider viscosity range than the 5w30, thus even more VII.
Nobody Special
New member
I agreed, but there are some other variables.
That is the main part.
Some bases are superior to others though, but not many people will spend the money, plus it is overkill for most applications.
Specifically Group V and VI (PIO) (in Europe) bases.
This seems to touch well on it.
https://www.infineuminsight.com/media/1814/3-lubricant-base-stocks-na.pdf
Nobody Special
New member
Whatcha runnin?
The 4Runner still has the factory fill.
