A motor oil suitable for modern motor cars will contain 25% or more additive blended into a fully or semi synthetic base oil. The additives, some of which are measured in parts per million and others in larger percentages, will include anti-wear, corrosion inhibitors, detergent, dispersant, friction modifiers and viscosity modifiers to name but a few, will vary in chemical make up to meet the particular specification the motor manufacturer, the additive supplier and the blender wish to achieve.
Every batch of our Pro+Power motor oils are subjected to elemental analysis by WD-XRF to ASTM D4927/D6443 or Infrared FT-IR, both of which measure the chemical composition of a lubricant, to ensure that the levels of all additives including Sulphur and Phosphorus are within the limits required for the satisfactory operation of the engine and the exhaust after treatment equipment. Only the highest quality motor oils meet these stringent requirements.
Viscosity Test methods ASTM D-5293 & D-445
The viscosity of a motor oil plays a significant part in the engines wear characteristics, fuel economy and exhaust emission. It has been well documented that up to 80% of engine wear and maximum fuel consumption takes place during the warm up period. In order to ensure that our motor oils are correct during this critical time, the viscosity of the oil is tested initially at a sub zero temperature using a Cold Crank Simulator, to ensure that it flows correctly at low temperature, followed by two viscosity checks at 40 and 100 Deg. C, the engines normal operating temperature. A combination of these tests allows us to confirm that an oil meets the required viscosity. For example a 10w/40 should have a viscosity of less than 7000cP @-25 Deg. C. (the W or winter figure) and between 12.5- 16.3 cSt @ 100 Deg C. Only the highest quality motor oils meet these stringent requirements.
High Temperature/High Shear (HTHS) Test Method ASTM D-4741/ CEC-L-036-90
All of our motor oils are tested using High Temperature/ High Shear (HTHS) equipment at 150 Deg. C. We need to know that our engine lubricants afford maximum protection in the hot spots around the engine where the local temperature may be excessive and the oil will be subject to both high temperature and high shear conditions. Areas of particular importance are crankshaft bearings, camshaft bearings and piston and ring contact around the cylinder wall.
As motor oil viscosities have reduced to improve fuel economy and exhaust emission, small differences of viscosity and shear at these high temperatures have become important factors, influencing motor manufacturers in their preferred choice of motor oil specification for a particular engine. Only the highest quality motor oils meet these stringent requirements. Always check your vehicle handbook.
Evaporative Loss Test Method ASTM D-5800/ CEC-L-040-93 (Noack)
An engine doesn’t just burn oil. Poorly formulated or cheap motor oils may actually evaporate at high temperature becoming thicker and more viscous, resulting in poor circulation, reduced fuel economy and increased engine wear. This can be quite noticeable on a long drive when you notice that your oil level has dropped unexpectedly.
The Pro+Power ranges of motor oil have all been tested using the Noack method where the evaporative loss is measured at 250 Deg. C. ACEA lay down maximum limits for this test and for example an ACEA C3 motor oil must be less than 13% evaporative loss, where as tests on our Pro+Power 5w/30 C3 Long Life report less than 8% evaporative loss. Only the highest quality motor oils meet these stringent requirements.