I havent used the 5W30 but I have used the 10W30 many times andit seems to do well.I am using the 10W30 now.
ST is made by Warren Performance Products,they actually blend the products themselves with the base oils they get from other suppliers.
Here is the PDS for the 10W30 and 10W40 versions of ST from WPP,the add pack should be the same for 5W30.
10W-30
Physical Specifications
Procedure Test Min Max Typical Results
ASTM D4052 Specific Gravity at 60°F NA NA 0.8717
ASTM D287 API Gravity NA NA 30.83
ASTM D445 Viscosity at 100°C, cSt 9.3 ASTM D445 Viscosity at 40°C, cSt NA NA 67.73
ASTM D2270 Viscosity Index NA NA 138
ASTM D1500 ASTM Color NA NA 2.5
ASTM D5293 Cold Cranking Simulator, cP NA 7000 6249
ASTM D5185 Zinc, % mass NA NA 0.085
ASTM D4951 Phosphorus, % mass 0.06 0.08 0.077
ASTM D5185 Calcium, % mass NA NA 0.214
ASTM D5185 Molybdenum, % mass NA NA 0.0079
ASTM D5185 Boron, % mass NA NA 0.023
ASTM D4951 Sulfur, % mass NA 0.5 0.309
ASTM D5762 Nitrogen, % mass NA NA 0.102
ASTM D874 Sulfated Ash, % mass NA NA 0.92
TM
Conventional 10W-30 API Performance SN/GF-5
• Super Tech Conventional Motor Oil contains only the highest quality, hydro-treated lubricating oils and a technologically advanced additive system, which includes detergents, dispersants, viscosity improver, anti-wear and anti-friction agents as well as oxidation and corrosion
inhibitors.
• Reduced friction for excellent protection against wear and improved fuel economy
• High resistance to viscosity and thermal breakdown
• Meets or exceeds the latest North American vehicle warranty requirements API SN and previous API engines classifications SM, SL, SJ, SH
and ILSAC GF-3, GF-4 and GF-5.
12/9/2010
10W-40
Physical Specifications
Procedure Test Min Max Typical Results
ASTM D4052 Specific Gravity at 60°F NA NA 0.8710
ASTM D287 API Gravity NA NA 30.96
ASTM D445 Viscosity at 100°C, cSt N/A N/A 15.33
ASTM D445 Viscosity at 40°C, cSt NA NA 106.5
ASTM D2270 Viscosity Index NA NA 152
ASTM D1500 ASTM Color NA NA 2.5
ASTM D5293 Cold Cranking Simulator, cP NA N/A 6771
ASTM D5185 Zinc, % mass NA NA 0.091
ASTM D4951 Phosphorus, % mass 0.06 0.08 0.079
ASTM D5185 Calcium, % mass NA NA 0.169
ASTM D5185 Molybdenum, % mass NA NA 0.0079
ASTM D5185 Boron, % mass NA NA 0.023
ASTM D4951 Sulfur, % mass NA 0.5 0.315
ASTM D5762 Nitrogen, % mass NA NA 0.102
ASTM D874 Sulfated Ash, % mass NA NA 0.92
TM
Conventional 10W-40 API Performance SN
• Super Tech Conventional Motor Oil contains only the highest quality, hydro-treated lubricating oils and a technologically advanced additive system, which includes detergents, dispersants, viscosity improver, anti-wear and anti-friction agents as well as oxidation and corrosion
inhibitors.
• Reduced friction for excellent protection against wear and improved fuel economy
• High resistance to viscosity and thermal breakdown
• Meets or exceeds the latest North American vehicle warranty requirements API SN and previous API engines classifications SM, SL, SJ, SH
12/9/2010