Oil/ Lubes
I get a lot of concerns concerning oil and the least understood part is the number system used to rate oils. Oil weight, or viscosity, describes how thick or thin the oil is. The temperature level requirements set for oil, by the Society of Automotive Engineers (SAE) is 0 degrees F (low) and 210 degrees F (high). Mobil oil Australia fulfilling the SAE's low-temperature requirements have a "W" after the viscosity rating (example: 10W), and oils that fulfill the high rankings have no letter (example SAE 30). Oil is rated for viscosity by warming it to a specified temperature, and then enabling it to flow out of a specifically sized hole. Engines require oil that is thin enough for cold starts, and thick enough when the engine is hot. Given that oil gets thinner when warmed, and thicker when cooled, the majority of us use what are called multi-grade, or multi-viscosity oils. These oils meet SAE specs for the low-temperature level requirements of light oil and the high-tem...