Need help

[The_Captain]

For all you oil experts and amateur oil blenders I need some help. If I took 4.5 qts of Amsoil Signature Series 0w20 and 1 qt of Signature Series 0w30 what would the viscosity numbers be? Or if I used 1qt of Signature Series 0w40 instead. Looking for a more robust 0w20 weight for summer driving on my Jeep. I already have the Amsoil oils on hand. I appreciate your help in figuring what the numbers would be.

 

[RooflessVW]

0W-21.81 -or- 0W-23.63

Just kidding, it doesn't work like that. If you want a more robust 0W-20, use a 0W-30.

 

[atikovi]

Looking for a more robust 0w20 weight for summer driving on my Jeep.

What does the owners manual recommend and why do you think you know better than the engineers that designed it?

 

[ripcord]

Adding one quart of slightly thicker oil isn't going to make any practical difference in viscosity.

 

[blufeb95]

Just dump all 0w30 in there, if you're worried about warranty, you're already not using Chrysler approved oil so just use whatever.

 

[Warstud]

4.5 qts of Amsoil Signature Series 0w20 + 1 qt 0w30... not much difference
4.5 qts of Amsoil Signature Series 0w20 + 1 qt 0w40... not much difference

 

[atikovi]

Just add a can of STP and call it a day.

 

[The_Captain]

What does the owners manual recommend and why do you think you know better than the engineers that designed it?

It calls for 0w20. Just looking for the higher end of the 20 weight.

 

[The_Captain]

Just dump all 0w30 in there, if you're worried about warranty, you're already not using Chrysler approved oil so just use whatever.

It meets or exceeds API SP GM Dexos 1(Gen 2) plus Chrysler MS-6395. Also, they can't void my warranty for using it. I am just looking to make the oil on the upper end of the 20 weight.

 

[atikovi]

It calls for 0w20. Just looking for the higher end of the 20 weight.

If your goal is to make something like 0W27, nobody here can tell you what combination of weights to mix together. The results aren't always necessarily linear. If you use 2 quarts of 0W20 plus 3 of 0W30, common sense would say that's pretty close enough though.

 

[Orthos]

0W-21.81 -or- 0W-23.63

Just kidding, it doesn't work like that. If you want a more robust 0W-20, use a 0W-30.

That's not exact, but a rough estimation.

There is a viscosity calculator online somewhere for an exact approximate result based on the factors that blend.

 

[Zaedock]

Go to the Widman site and search for the viscosity mixing calculator.

 

[RooflessVW]

"viscosity calculator"

If you want a thicker oil, run a thicker oil.

 

[Astro14]

Either choice will be fine in your Jeep, though the difference is modest.

Does your Jeep have an oil cooler?

If so, you may find that "summer" driving is the same oil temperature as "winter driving" and it really doesn't need anything more in the summer.

 

[Bighorn2500]

I have run five quarts 5w20 Mobil 1 and one quart of Mobil 1 5w30. It works out to roughly 51.19 cSt @ 40 degrees / 8.96 cSt @ 100 degrees. I’ve read that 52/9.3 is right at the high end of a 20 weight rating. 53/9.3 is the low end of a 30 weight rating, similar to the older Pennzoil Platinum 5w30.

Do your own homework here:https://www.widman.biz/English/Calculators/Mixtures.html

 

[widman]

When the 3.6 liter Pentastar engine first came out, they recommended 5W-30 in it, and that is what my 2012 manual says to run. I think it was 2014 that they decided to recommend 0W-20. I continue to use the 5W-30 synthetic I've always used.

 

[Shel_B]

4.5 qts of Amsoil Signature Series 0w20 + 1 qt 0w30... not much difference
4.5 qts of Amsoil Signature Series 0w20 + 1 qt 0w40... not much difference

Switch to 0W-30 ... difference.