Hello all-
I recently purchased an '07 3.5l Charger. It is still under warranty so I started looking for the thinnest 10w30 and 5w30 oils available. I decided to post my findings, I hope this is helpful to you. I used the BITOG calculator to determine temperatures other than 40*C and 100*C.

-20*C = -4*F
0*C = 32*F
25*C = 77*F
40*C = 104*C
100*C = 212*F



Ultra
-20*C 0*C 25*C 40*C 100*C
10w30 3031.94 559.54 123.16 61.9 10.3
5w30 2225.17 459.34 110.44 57.5 10.3

Platinum
10w30 3119.64 575.11 126.32 63.4 10.5
5w30 2225.17 459.34 110.44 57.5 10.3

Mobil 1
10w30 3291.16 600.48 130.66 65.3 10.7
5w30 2489.7 511.25 121.85 63.1 11.1

SynPower
10w30 3246.77 589.89 128.1 64 10.5
5w30 2308.06 474.5 113.58 59 10.5

Ultimate Durability
10w30 4783.47 556.57 125.92 63.9 10.8
5w30 3536.77 461.45 111.99 58.5 10.53

Edge (W/ Syntec and Titanium)
10w30 3294.47 576.14 122 60.46 9.82
5w30 2083.74 430.24 103.78 54.17 9.8

I'd like to post this as a picture so it isn't smooshed up but I can't figure out how, if someone could give me a tip it would be great.

Here is the table in a little cleaner format. Note that the Edge is the new formula and that Edge with Syntec and Edge with Titanium have the same numbers.

interesting. Looks like QSUD is lacking in the cold flow dept. I always read into things too much. Are you sure you got the #'s right between PP&PU 5w30? They are exact.

Yeah I think that there is an error somewhere with the numbers between the PP and Ultra in 5w30. I am inclined to believe that the error lies with the PP numbers, I had to go through the Shell website to find its numbers though and the PDS was of the new GF5, SN formula so who knows?

RamFan, I'm afraid you're playing a mug's game because comparing the kinematic viscosities of different oils is very misleading.
What you really need to do is compare the HTHS vis and VI's of various oils.
The following post explains why in more detail:

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1993351&page=1

For example M1 10W-30 has a HTHS of 3.26cP and VI of 154 vs 3.13cP and 170 for M1 5W-30. What that means is that M1 10W-30 will be about 10% thicker at 100C than M1 5W-30, not the 4% thinner that the KV100 spec's would indicate. At 40C the 10W-30 will be 20% thicker and more than 30% at 0C.

I know this may be confusing, but in the next couple of days I'm planning on posting an fairly easy way (I hope) of calculating and graphing the actual real viscosity differences I mentioned.

Stay tuned.

It does appear that QSUD is not the oil I want to run in the winter.

Excellent data compilation! Although if you added Noack values you may be surprised which is the better oil. Another member did a Noack comparison so I can't take credit for this. It does stand for reason the lower the Noack the higher the POA and quality of the oil. Not being an Amsoil fan I still must give credit where credit is due.

01. Amsoil 100% Synthetic 10w30 5.70%
02. Red Line 5w30 6.00%
03. Red Line 10w30 6.00%
04. Amsoil XL 10w30 6.70%
05. Amsoil Heavy Duty Diesel 10w30 6.70%
06. Amsoil 100% Synthetic 5w30 6.90%
07. Valvoline MaxLife Synthetic 10w30 7.00%
08. Amsoil Heavy Duty Diesel 5w30 7.60%
09. Valvoline Synpower 10w30 8.00%
10. Amsoil 100% Synthetic 0w30 8.65%
11. Amsoil XL 5w30 8.90%
12. Red Line 0w30 9.00%
13. Valvoline MaxLife Synthetic 5w30 9.50%
14. Pennzoil Platinum 10w30 9.70%
15. Valvoline Synpower 5w30 10.50%
16. Quaker State Ultimate Durability 10w30 11.10%
17. Pennzoil Ultra 10w30 11.20%
18. Castrol Syntec 0w30 11.28%
19. Pennzoil Ultra 5w30 11.90%
20. Quaker State Ultimate Durability 5w30 12.30%
21. Pennzoil Platinum 5w30 12.50%

Where does M1 fall in that list.

If the NOACK/PAO content assumption and chart's data is correct, why would a 10w-30 require a higher PAO content then 5w-30? To me, this seems counterintuitive to common tribologist logic.

[/quote]Where does M1 fall in that list. [/quote]

I contacted Mobil about Noack and they gave me a range i.e. 11-13%. No definitive answer from them unlike the other oil manufacturers. I am sure it could be added from virgin oil analyses found here on the board.

No garden variety VOA will provide the NOACK #.

At this point, I'm further behind than when I started reading this thread! Interesting stuff, but I'm getting lost in the details.

Please do explain the “Tribologist logic”. Would it be conflicting with the accountant logic for profitable high selling 5W30?

Yes it does look as if that is the case. It is weird how it compares very consistently with the other oils in both flavors until you reach -20. Then it has substantially less flowing ability. Odd how that can occur, especially with the 40 and 100 temps being so similar to the rest.

IMO the NOACK percentage is one of the least important oil spec's and a higher than average value would not deter me from choosing any oil.
All SM and SN oil must have a percentage under 15 and that seems to eliminate any oil consumption due to evaporative losses. Keep in mind the NOACK test is done at 250C which is very hot indeed.
The lighter the oil the higher the NOACK % consiquently 0W-20 oils can have values approaching the 15% maximum.
An oil I'm familiar with, PP 0W-20, has a NOACK of 14% and a couple of members that have used this have noticed no measurable oil consumption over an OCI.

Now using the NOACK % as an indicator of a base oil's quality does have some validity to it but you must make sure the oil with the lower NOACK is just thicker; i.e., a higher HTHS viscosity.