0W16 + 0W20 = 0W18? Mixing 2 qts Castrol 0W20 with 2 qts Toyota 0W16!

PetitFrereArmada

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I discovered this interesting thread on the 10th gen non hybrid section talking about 0W16.


Did some more reading around and came across some interesting reads I found about 0W16. Posting the links here. Just my interest in this oil and wanting to know more about it. So, saving the links here for if I want to reference myself back to it someday.

Japan has been using 0W16 oil for over 20 years now. In the near future, they will be coming out with 0W8 oil

Basically, 0W16 was introduced mainly to maximize fuel economy for small displacement 4 cylinder cars like the Honda Fit, Toyota Camry, Toyota Camry Hybrid, Honda Accord, Honda Accord Hybrid. And some others.

And these 2screen shots are from the link below
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0w-08 is old news.


 

PetitFrereArmada

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0w-08 is old news.


You are very correct. But my focus now is reading more about the 0W16 to see if I feel comfortable using it in my car in the near future. So, far it is looking good that I will be putting the 0W16 in my car when I decide to change my current oil.
 
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I'm waiting for 0W-4 to come out. Until then I'm using Ronsonol Lighter Fluid. But if I do switch to 0W-4, I'm going to have to learn to live with .0000003 MPG less. That's bothersome. Along with the peace of mind I'll be giving up by using the Ronsonol, with it's, Super Nano Protection Package. But let's face it, life is full of difficult choices.
 
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Many years ago I posted a similar question, about mixing oils of different brands and/or different types, here on BITOG. One of the old timers pointed out that there is a risk involved, that should be obvious to most of us here, but is easy to overlook.

Each motor oil is designed with it's own add pack, with different companies using different formulations for detergents and antiwear additives. Even within a brand, a HM oil may have a different add pack than an extended life motor oil.

Let's take your formula for an example. Castrol uses a heavy does of calcium and magnesium for detergents, and primarily phosphorus and zinc for antiwear. Toyota uses even a heavier dose of calcium, but also adds a good share of moly. Now that you mix them, the oil in your engine doesn't quite measure up in overall add pack to what either Castrol or Toyota engineered. This garage science experiment isn't going to protect your engine in quite the same way that either company intended.

This may be fine for a single oil change once in a while. But for one oil change after another, to never fully protect your engine, is risky.

You may reach out to Molykule and see if he still feels the same way.
And Honda is all in on the TGDI bandwagon, while Toyota shied away for it except for the Lexus NX200/GS200t/LS500, GR Yaris and the new 2022 Tundra. There’s reason why D1G2 oil, as well as API SP/SN Plus and the newest BMW/Mercedes/VW oil standards cut on on Ca as a detergent additive.
 
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ummm are you sure your not getting lower mpg due to the summer blend of gas being replaced by winter blend? that and tire pressure would have a huge impact on mpg, always....
 

PetitFrereArmada

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ummm are you sure your not getting lower mpg due to the summer blend of gas being replaced by winter blend? that and tire pressure would have a huge impact on mpg, always....
You were right. I put my psi to 36psi and continued my hypermiling and my mpg went up to above 60mpg. Honda recommends we run our mpg at 33psi cold, but I like to run mine at 3 above. So, I run my tires at 36psi.
Just a reminder that everytime you change brands and/or grade, you are mixing in probably a 1/2 qt of the old oil with the new. So you be mixin'
Lol, so true. I wonder how much oil is left in the car when one completely drains the oil when one is doing an oil change at home. I wonder how much is left before I add the 4 quarts that my car takes.

Well, next week I will be changing my oil and will mix the 0W16 Toyota oil with the 0W20 Castrol high Mileage oil.

0W16 is NOT recommended for my car, but I am hoping it does not harm my car. That is why I am mixing away.

I mean, I currently have a mixture of 0W20/5W20/5W30 in my car and I am still getting over 60mpg hypermiling in city driving. I would have used this mixture for only 2,500 miles by the time I will be changing it next week. I used that mixture only to rinse my engine out.
 

PetitFrereArmada

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This was 2 weeks ago. You see my mpg. My gas tank is 12.8 gallons. I got 756 miles with an mpg of 63mpg. This is mainly hypermiling in the city and going to work where the speed limit is 60mph. And that was ny top speed throughout this run with this gas tank.
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Then this is my current mpg as of last night when I got home; I have done 310 miles so far on this tank of gas and achieving 68mpg
EDjRgLA.jpg

So, I will change my oil next week with the 0W16/0W20 and hope it gives me a very slight increase in mpg.
 
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