SL 10W-40 is a gasoline engine oil for passenger cars in the SAE 10W-40 viscosity grade, formulated to API SL. API lists SL as a current category for gasoline automotive engines of model year 2004 and older.
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Grades & published data
Typical values from the product data sheet, each with its test method.
| Property | Value | Method |
|---|---|---|
| Kinematic viscosity at 40 °CcSt | 92.5 | ASTM D445 |
| Kinematic viscosity at 100 °CcSt | 15.3 | ASTM D445 |
| Viscosity index | 144 | ASTM D2270 |
| Cold-cranking viscosity (CCS)at -25 °CcP | 5841 | ASTM D5293 |
| Total base number (TBN)mg KOH/g | 6.05 | ASTM D2896 |
| Pour point°C | -36 | ASTM D97 |
| Flash point (open cup)°C | 224 | ASTM D92 |
| Copper strip corrosionat 100 °C | 1a | ASTM D130 |
| Foaming, Sequence I (24 °C)ml/ml | 5/0 | ASTM D892 |
| Foaming, Sequence II (93.5 °C)ml/ml | 10/0 | ASTM D892 |
| Foaming, Sequence III (24 °C after 93.5 °C)ml/ml | 5/0 | ASTM D892 |
| Kinematic viscosity at 100 °C after shear (30 cycles)After shear, 30 cycles (ASTM D6278)cSt | 13.8 | ASTM D445 |
| Noack volatility%wt | 4.5 | ASTM D5800 |
| Specific gravity | 0.874 | ASTM D4052 |
| Viscosity loss after shear% | 10.5 | ASTM D6278 |
Overview
SL 10W-40 is a gasoline engine oil for passenger cars in the SAE 10W-40 viscosity grade, formulated to API SL. API lists SL as a current category for gasoline automotive engines of model year 2004 and older.
The specification table publishes typical values with their ASTM methods — kinematic viscosity, cold-cranking viscosity, Noack volatility, base number, shear stability, foaming tendency and copper corrosion — so the oil can be checked against the vehicle handbook before purchase.
Application
Vehicles whose handbook calls for API SL — per API, gasoline engines of model year 2004 and older — or an earlier API gasoline category.
Application
The 10W winter rating is tested at -25 °C under SAE J300; use this grade where the handbook's viscosity chart allows 10W-40 for local temperatures.
Feature
Kinematic viscosity at 100 °C is 15.3 cSt, within the SAE J300 band for grade 40 (12.5 to below 16.3 cSt). Cold-cranking viscosity is 5,841 cP at -25 °C, under the 7,000 cP maximum that SAE J300 sets for 10W.
Feature
A viscosity index of 144 (ASTM D2270), Noack evaporation loss of 4.5 %wt (ASTM D5800) and a pour point of -36 °C (ASTM D97) are published as typical values.
Feature
The total base number (TBN, ASTM D2896) of 6.05 mg KOH/g is the oil's alkaline reserve for neutralising acidic combustion by-products between drains.
API describes SL as suitable for gasoline engines of model year 2004 and older. Check the API category and SAE grade printed in your vehicle handbook; newer engines usually require a later category.
Next step
The range above is what we publish. Formulation to a customer brief is a route of its own, and a sample is the first stage of it.
