Is Amsoil ASL 5W-30 considered a "thick" 30 wt. oil?

Messages
85
Location
Grand Forks, ND
I'm beginning to think Mobil 1 5W-30 is just too thin for me. Is Amsoil's full syn 5W-30 thicker than Mobil 1 at operating temp? Is the ASL close to a 40 weight? How does the Amsoil ASL compare to the German Castrol at operating temp? What are the specs on Amsoil's ASL 5W-30? Thank you for your help!
 
Messages
47,633
Location
Duvall WA - Pacific NW USA
code:
  AMSOIL 100% Synthetic 5W-30 Motor Oil (ASL) 
 
Kinematic Viscosity @ 100°C, cSt (ASTM D-445)
 11.7 
 
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)
 63.4 
 
Viscosity Index (ASTM D-2270)
 182 
 
CCS Viscosity @ -25°C, cP (ASTM D 2602) 
 2555 
 
Borderline Pumping Temperature °C (°F) (ASTM D-3829) <-40 (-40) 
 
Pour Point °C (°F) (ASTM D 97)
 -51 (-60) 
 
Flash Point °C (°F) (ASTM D 92)
 230 (446) 
 
Four Ball Wear Test (ASTM D-4172 B: 40 kg, 75°C, 1200 rpm, 1 hour, Scar in mm)
 0.35 
 
Noack Volatility, % weight loss (g/100g) (ASTM D-5800) 6.9 
 
High Temperature/High Shear Viscosity cP, 150°C, 1.0 X 106 s.-1, (ASTM D 4683),
 Minimum 3.5 
 
Total Base Number
 >11.0
 
 

 
Messages
700
Location
USA
It depends on what your operating temp is. If it is 212f the Mobil 1 will be thinner. But if it is 150f the Mobil 1 could actually be thicker at that temp. I would think that the Mobil 1 would be thinner at all temps though. I don't think you would be able to see it on your pressure gauge.
 

MolaKule

Staff member
Messages
21,591
Location
Iowegia - USA
What Pablo said! Mobil 1 is simply on the low side of a 30 weight viscosity but it is still "in grade." I have found Amsoil ASL to be an excellent oil for the higher lattitudes, such as Iowa on north. I use in my MIL's V-6 Oldsmobile all year round in Northeast Iowa.
 
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