![]() If there is a letter W, it relates to an oil for winter. In contrast, in winter you need a less viscous oil to make cold starts easier. In summer you need more viscous oil because the heat makes it more liquid. Monograde oils have to be changed during seasons when weather conditions are at their most extreme (winter and summer). Multigrade oils, such as 15W-40, don’t need changing according to the seasons, just whenever it’s time for an oil change, as they are not affected by temperature in the same way as monograde oils. Using this base measurement, the oils are split into monograde (suitable for specific temperatures) or multigrade (suitable for a wide range of temperatures). To classify the oils, their viscosity is measured in cold conditions at different temperatures below zero, and then in hot conditions at 100✬. SAE, the acronym for the Society of Automotive Engineers, is responsible for establishing a classification system based solely on oil viscosity. Oil viscosity is very important and is affected by the temperature. However, excessive viscosity at high temperatures could cause more internal friction and poorer engine performance and consumption. ![]() Viscosity is necessary in warm temperatures to protect the mechanical pieces in contact. The higher the SAE grade, the higher the viscosity and denser the lubricating film. The second number refers to the viscosity in warm temperatures (measured at 100✬). An oil with a low SAE W number will flow better, have better cold starts, and lower engine wear. One of the numbers is followed by a W, which refers to “winter” and indicates the viscosity grade in cold temperatures. On this type of lubricant you’ll see two numbers separated by a hyphen. This team sees many different applications of heavy-duty engine oils and gain insights to current trends along with industry challenges which enhance support to provide reliability to many diverse fleet operations.SAE 15W-40 refers to a multigrade lubricant. On oil and lubrication can be invaluable for owners and operators.Īt Petro-Canada Lubricants, we go offer support such as training, lube surveys, technical expertise and oil analysis. Our team of Technical Service Advisors provide guidance and expertise that can help fleets maximize uptime and keep their vehicles on the road, all supporting the ultimate goal of efficiency and reliability. Manufacturers spend millions of dollars testing their lubricants in differentĬonditions for multiple engine types, meaning their recommendations and advice Lubrication only makes up a smallĪmount of most fleets’ total maintenance budget, while expert lubricant Immediate way to reduce fuel consumption. ![]() Seek lubricant expertiseĬhanging your engine oil viscosity grade can be a cost-effective and OEMs also will have tested their engine models in various environments and with different engine oils, in addition to their ability to chart which viscosities are appropriate for a range of ambient temperatures. In this situation, it’s crucial to consult your Original Equipment Manufacturer (OEM) to confirm whether your warranty will be affected. The decision to change engine oil viscosity grade cannot be taken lightly, but through careful planning and the use of a high-performance engine oil that does not compromise engine protection, it can lead to excellent returns. This enables engines to run more efficiently and use less fuel, while still offering improved levels of wear protection by delivering oil more efficiently to moving parts within the engine. Lower viscosity FA-4 oils minimize frictional losses between moving components of the engine and reduce pumping and cranking losses, resulting in less viscous drag and improved fuel economy. The category was formulated to get the best out of the latest, more fuel efficient, low-emissions diesel engines. The drive to improve fuel economy has been taking place for some time and to do this, the industry has been moving towards lower viscosity solutions, demonstrated by launch of the API FA-4 oil category in December 2016. Technical advances toward low viscosity solutions Of engines, which offers improved protection for fleets operating in colderĬlimates. These oils can also decrease the warm up time Viscosity engine oils reduce viscous drag on moving parts, enabling the oil toįlow more efficiently through the engine, and in turn reducing any parasitic This can be achieved by switching to low viscosity engine oils which can help to reduce overall fuel consumption. Owners face a continual task of cutting costs, so running their fleets in a cost-effective and sustainable way is crucial-while this affects their general business management, maintaining compliance with industry emission regulations is also increasingly important.
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