2016 Toyota Avalon - 12,000 miles Amsoil Signature Series 5W30

Uh, exactly how did you determine that?
Sus should be between 46-57
cSt 6.0-9.7

His example shows a Sus of 50.6 and a cSt of 7.45

Tell me how that is not in range for 0w20? You are using 5w30 values for 0w20.
 
Is that Avalon spec'd for 0w20 or 5w30? I wonder what Mobil 1 5w30 EP would have done considering the 0w20 did so well.
It’s spec’d for 0W20, I use 5W30 in it. I am definitely considering going with the 5W30 Mobil1 EP…I have run regular Mobil1 5W30 for 10,000 mile intervals in the past with good results (virtually zero oil usage).
 
This is a great example of engine quality & oil working very well together. 20 grade did have a fractional higher amount but really nothing to complain about at all. The 0w-20 would still work well if driven reasonably. Can't find any faults w/this SS 5w-30 either. 5w-30 may be a great option for all around oil. Toyota at the end of the day has proven longevity so you have that going. Did you even notice better fuel economy w/the 20 grade oil or not keeping track of that?
I didn’t notice any sort of fuel economy advantage with the 0W20. I get really consistent (and good) fuel economy with this thing…lifetime 27.5 mpg.
 
With Mobil I u had zero make-up oil on a 12K OCI? Am I correct? That is amazing!
No, I had zero makeup up oil using the Mobil 1 EP 0W20 for 10,000 miles. The Amsoil used a little oil initially, plus I did a filter replacement halfway through…probably a half quart top up all together with Amsoil vs none for the Mobil 1.
 
What a motor! No wear!
Yeah, the thing amazes me. I’m at 150,000 miles now and I’m 8,000 miles in on a run with Pennzoil Ultra Platinum…zero makeup oil at all. Nothing. Oil looks like it has 3,000 miles on it. But I’m seriously considering sticking to one oil for the remainder of my ownership of this thing, what that oil will be?? I’m not sure yet. Maybe Mobil1…I just like how easily available it is…sometimes on sale.
 
Yeah, the thing amazes me. I’m at 150,000 miles now and I’m 8,000 miles in on a run with Pennzoil Ultra Platinum…zero makeup oil at all. Nothing. Oil looks like it has 3,000 miles on it. But I’m seriously considering sticking to one oil for the remainder of my ownership of this thing, what that oil will be?? I’m not sure yet. Maybe Mobil1…I just like how easily available it is…sometimes on sale.
It is best to stick to 1 oil in my opinion while it isn't much of a difference to cause any real harm I have noticed with UOA's that when switching one oil to another there is a small increase in wear metals. Which recently Lake Speed Jr kind of confirmed that in a video.

You will always be able to find Mobil 1 or Pennzoil on the shelf somewhere. Mobil 1 prices have dropped a little bit recently at Walmart.
 
It is best to stick to 1 oil in my opinion while it isn't much of a difference to cause any real harm I have noticed with UOA's that when switching one oil to another there is a small increase in wear metals. Which recently Lake Speed Jr kind of confirmed that in a video.

You will always be able to find Mobil 1 or Pennzoil on the shelf somewhere. Mobil 1 prices have dropped a little bit recently at Walmart.
Yeah, that Lake Speed video caught my attention a bit. I mean, we’ve always heard that switching brands continuously isn’t ideal, but to see a little something makes me want to stick with just one oil. Not that I think it’ll hurt anything, it’s just that in a world where I’ll pour through articles and all the stuff here for a little advantage on oil, sticking with one seems like the easiest thing I can do for an advantage (when splitting hairs).
 
It may be within range, but there was significant viscosity loss.

Obviously it isn’t an issue in this application, but there are applications where one may want better stability.
Keep in mind you are comparing a 5w30 oil to a 0w20 oil, not a fair comparison at all which at the end of the day that 0w20 had a good bit of life left in it even though I do not agree with extended intervals.
 
Yeah, that Lake Speed video caught my attention a bit. I mean, we’ve always heard that switching brands continuously isn’t ideal, but to see a little something makes me want to stick with just one oil. Not that I think it’ll hurt anything, it’s just that in a world where I’ll pour through articles and all the stuff here for a little advantage on oil, sticking with one seems like the easiest thing I can do for an advantage (when splitting hairs).

I must have missed the memo on switching brands! lol I'm always switching brands depending on what's on sale.

The only car I consistently use same oil is my Tundra.
M1 EP 10W-30 in summer
Valvoline EP 5W-30 in winter to feed the engine with some moly. 🤣
5K OCIs. On both.
 
Keep in mind you are comparing a 5w30 oil to a 0w20 oil, not a fair comparison at all which at the end of the day that 0w20 had a good bit of life left in it even though I do not agree with extended intervals.
I wasn’t. I was comparing the ending viscosity of the 0W20 to its starting viscosity.

If anything, any 0W20 should be more shear stable than a 5W30 since it has a smaller spread.
 
What’s the ASTM standard for “spread”
It is my understanding that more VII is typically required when you produce an oil with a wider viscosity range (e.g. 10w60 vs. 0w20). Thereby, oils with a narrower viscosity range should inherently be more shear stable.
 
It is my understanding that more VII is typically required when you produce an oil with a wider viscosity range (e.g. 10w60 vs. 0w20). Thereby, oils with a narrower viscosity range should inherently be more shear stable.
Well, certainly depends what base stocks they start with. A better side by side would be two 5W30’s - and if they are at least a 20 in the end - that motor will do great …
 
I must have missed the memo on switching brands! lol I'm always switching brands depending on what's on sale.

The only car I consistently use same oil is my Tundra.
M1 EP 10W-30 in summer
Valvoline EP 5W-30 in winter to feed the engine with some moly. 🤣
5K OCIs. On both.
I apparently missed the memo too, or simply ignored it (more likely). I have ALWAYS either gone with sales/discounts/rebates. I sometimes splurge with something like Amsoil…I figure…if I’m on here reading posts about oil, and into it as much as I sometimes am, why not spend a little more on something “better”? Just for the mental part of it.

Whereas you consistently use two oils in your Tundra, you are currently way ahead of me in oil consistency. In this Avalon I have used…RGT, Quaker State, Valvoline Modern Engine, Pennzoil Platinum, Pennzoil Ultra, Mobil1 EP, Regular Mobil1, Amsoil, Amalie, and regular Carquest house brand synthetic.
 
It is my understanding that more VII is typically required when you produce an oil with a wider viscosity range (e.g. 10w60 vs. 0w20). Thereby, oils with a narrower viscosity range should inherently be more shear stable.
In general. But the VI of the base stock is also influential in how much VM is required, and how shear prone the particular VM happens to be. Not to mention most engines do not place excessive shear forces on the oil.

In the example here it is not a spread of 10W-60, it is only between 0W-20 and 5W-30.
 
In general. But the VI of the base stock is also influential in how much VM is required, and how shear prone the particular VM happens to be. Not to mention most engines do not place excessive shear forces on the oil.

In the example here it is not a spread of 10W-60, it is only between 0W-20 and 5W-30.
And of course there is seldom a single base stock - at the price point of Amsoil SS - a bit of mPAO could be used as VM …
 
One of the better lubes in the marketplace, in one of the better engines ever made.
Should we be surprised that the wear numbers are so good?
This is exactly what I'd expect.

The OCI is way too short for this combo. That lube and oil could EASILY double the OCI and still have single digit wear values.
 
Not enough data - at a minimum, need oxidation and nitration values as well.
I do agree that more data is better than less data. But in this case, the ox and nitration aren't a significant cause for concern. If this were a budget oil in a known sludger engine, I'd agree. Or if there were indications of significant contamination such as coolant, Si, etc; there is no such issue here.

This is Amsoil SS in a 2GR-FE. There's not going to be any issues out to 20k miles if the engine stays mechanically sound. I've seen enough UOAs on these engines and I'm confident in Amsoil's ability to run that far. I stand by my recommendation.
 
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