VISTA PLATINUM 20W40 API CF-4

It looks like you're referring to a specific type of diesel engine oil (DEO) with the designation "20W40 API CF-4," and you've mentioned the brand as "VISTA PLATINUM." Let me break down the information for you:

Viscosity Grade (20W40): The "20W40" refers to the viscosity grade of the oil. Viscosity is a measure of how thick or thin a liquid is. The "20W" indicates the oil's cold-start viscosity (at lower temperatures), and the "40" indicates its viscosity at operating temperatures. In this case, the oil has a relatively lower cold-start viscosity, which helps with easier starts in colder temperatures, and a higher viscosity at operating temperatures, which provides good protection at higher engine temperatures.
API CF-4: The API (American Petroleum Institute) service category CF-4 indicates the level of quality and performance that the oil meets. CF-4 is an older specification that is still suitable for certain older diesel engines. It provides basic protection against wear, deposits, and oil breakdown.
Brand - VISTA PLATINUM: "VISTA PLATINUM" is the brand name of the diesel engine oil. Different brands may have their own formulations and additives to meet the specified performance standards.
Usage: This type of oil is typically used in diesel engines, especially in older or heavy-duty engines that require the specified viscosity grade and API CF-4 level of performance.
Before using any specific engine oil, it's important to ensure that it meets the manufacturer's recommendations for your particular engine. Different engines have varying requirements, and using the wrong oil could potentially lead to engine damage or reduced performance. Always refer to the vehicle's owner's manual or consult with a mechanic to determine the appropriate oil for your engine.