Is it worth spending about $4.00 more

[hammersley]

per gallon to get Valvoline PB Extreme http://www.valvoline.com/pages/produ...sp?product=103 there spec sheet....


Help these specs are confusing to say the least - for example compare Viscosity @ 100 for PB of 14.7 vs 15 for Shell.....there are other examples but I don't know what they mean......i.e. which way is better???

Typical Properties 5W40
Viscosity @ 40 C, cSt 89.4
Viscosity @ 100 C, cSt 14.7
Viscosity Index 172
CCS Viscosity @ - 30 C, cP 6300
Borderline Pumping Viscosity @ - 35 C, cP 17.300
High Temp. High Shear Viscosity @ 150 C, cP 3.9
Pour Point, deg. C -39
Sulfated Ash, % 1.6
Total Base Number (D-2896) 12
Foam / Aeration Tests Pass

over

Shell ROTELLA® T http://www.rotella.com/products/index.php

THeir spec sheet....

Typical Properties of Shell Rotella® T Synthetic
Test SAE Grade
Method 5W-40
Product Code 54300
Viscosity:
@ -30°C, cP D 5293 6400
@ 40°C, cSt D 445 90
@ 100°C, cSt D 445 15.0
Viscosity Index D 2270 176
Flash Point, °C D 92 222
Pour Point, °C D 97 -40
Low temperature cranking viscosity
cP @ -30°C
D 5293
6400
Low Temperature Pumping viscosity,
cP @ -35°C
D 4684
39,000
Neutralization No. TBN-E D 2896 11.5
Sulfated ash, wt% D 874 1.47
Handling