My Mobil 1 Extended Performance 10W-40 approximation.

[scout]

Numbers followed by # are from the Mobil MSDS.
Numbers followed by ? are my extrapolations from other Mobil 1 oils.
All other numbers come from the Shell viscosity calculator.

Using these numbers:

Mobil 1 Extended Performance 15W-50
HTHS: 5.4?
Vis@100C: 18.7#
Vis@40C: 136.5#

Mobil 1 Extended Performance 5w30
HTHS: 3.2?
Vis@100C: 10.2#
Vis@40C: 57.2#

Mobil 1 Extended Performance 10W-40
HTHS 4.2?
Vis@100C: 14.2#
Vis@40C: 91.3#

I get this:

Mobil 1 Extended Performance 10W-40
HTHS 4.2?
Vis@150C: 5.6
Vis@100C: 14.2#
Vis@40C: 91.3#
Vis@-20C: 4530
VI: 161
HTHS/Vis@150: .75

52% Mobil 1 Extended Performance 15W-50 48% Mobil 1 Extended Performance 5w30
HTHS: 4.2?
Vis@150C: 5.6
Vis@100C: 14.0
Vis@40C: 89.9
Vis@-20C: 4510
VI: 160
HTHS/Vis@150: .75

See the close match?

(Also,
3*15W-50 + 2*5w30 = 14.7@100C, 5040@-20C
2*15W-50 + 3*5w30 = 13.0@100C, 3816@-20C.
One of these might be my next oil load.)

 

[haley10]

Hmmm, if I take 1 qt. of Mobil 1 Extended Performance 15w50 and mix with 4 qts. 10w30 SL, I wonder what I get?

I'm not so sure the 10W-40 product is going to make it, so feel free.....

 

[scout]

quote:

---

Originally posted by haley10:
Hmmm, if I take 1 qt. of Mobil 1 Extended Performance 15w50 and mix with 4 qts. 10w30 SL, I wonder what I get?

---

Do you really want to know?
I'm not an expert, and this might not be reliable.
Take them for what they're worth (possibly nothing).

1*Mobil 1 Extended Performance 15W-50 + 4*Mobil 1 10w30 SL

HTHS: 3.5?
Vis@150: 4.6
Vis@100: 11.3
Vis@40: 72.6
Vis@-20: 4099 (Here is a weakness, if applicable)
VI: 148
HTHS/Vis@150C: .76 (Very good in my opinion.)

I don't have time to do any more.
The calculator is here:
http://www.shellglobalsolutions.com/base_oils/toolbox/toolbox.htm#

 

[haley10]

Thanks Scout. Yep, I really did want to know. I have some M1 left-overs to use up.