Lube Advisor

Sinclair Synthetic Blend 10W-40 Motor Oil

Synthetic Blend Motor Oil Passenger Car Motor Oil

Sinclair Synthetic Blend 10W-40 Motor Oil is specifically formulated for the needs of older vehicles and/or higher-temperature climates, where thicker oils may be preferred. It offers the following:

  • Thermal breakdown resistance and deposit formation reduction, for better, longer-lasting engine protection than conventional oils provide.
  • Engine cleaning additives.
  • A strong film barrier that controls friction, resists wear and prevents contact between metal surfaces.

Conventional Motor Oil: Performance You'll Notice

Specifically formulated to give you:


Unsurpassed control of friction and wear.

  • Designed to work, even under the most severe, extreme environmental conditions and engine stresses.


A strong oil film helps avoid metal-to-metal contact, even under stress.

  • Excellentprotection against wear, with molecules that actually bond and prevent metal-to-metal contact of rotating engine parts.
  • Heat-activated friction reduction that forms a vital barrier that protects against friction in metal surfaces.1


Extends oil life by withstanding heat and shearing.

  • Excellent control of oxidation and deposits.
  • Keeps working and protecting, even in harsh conditions.

¹ To measure friction reduction benefits, engineers used the ball-on-disk traction test.


  • Provides performance benefits for passenger cars, light trucks and sport utility vehicles, including new and rebuilt engines.
  • Exceeds ILSAC GF-6 performance requirements.

Industry/OEM Specifications

API SP Approved
API SJ, SH, SG, SF Meets Requirements
API SL Meets Requirements
API SM Meets Requirements
API SN Meets Requirements
API SN Plus Meets Requirements

Typical Properties

Boron, wt. % ASTM D5185 0.02
Calcium, wt. % ASTM D5185 0.099
Cold Cranking Simulator at (°C), cP ASTM D5293 6100 (-25)
Color ASTM D1500 3
Flash Point °C ASTM D92 237
Flash Point °F ASTM D92 459
Foam Seq. III (Tendency/Stability), mL ASTM D892 (Opt. A) 0/0
Foam Seq. II (Tendency/Stability), mL ASTM D892 (Opt. A) 0/0
Foam Seq. I (Tendency/Stability), mL ASTM D892 (Opt. A) 0/0
Gravity, °API ASTM D287 31.71
High Temperature Foaming, static foam ASTM D6082 (Opt A) 0/0
High Temperature / High Shear Vis at 150°C, cP ASTM D5481 3.99
Magnesium, wt. % ASTM D5185 0.059
Molybdenum, wt. % ASTM D5185 0.0079
Nitrogen, wt. % ASTM D4629 0.087
Noack Volatility, % loss ASTM D6375 11
Phosphorus, wt. % ASTM D5185 0.077
Pour Point °C (°F) ASTM D5950 -39°C (-38°F)
Pumping Viscosity at (°C), cP ASTM D4684 30,000 (-30)
Shear Stability, Final Viscosity in cSt ASTM D6278 11.5
Specific Gravity @ 60°F (15.6°C) ASTM D4052 0.8670
Sulfated Ash, wt. % ASTM D874 0.92
Sulfur, wt. % ASTM D4951 0.3
TBN, mgKOH/g ASTM D2896 7.0
Viscosity @ 100°C cSt ASTM D445 14.96
Viscosity @ 40°C cSt ASTM D445 107.3
Viscosity Index ASTM D2270 145
Zinc, wt. % ASTM D5185 0.085

Container/Bulk Availability

6/1 Quart Product Number - 503-006
6/1 Quart Product Number - 540-014
Available in Bulk