![]() Thick, high viscosity oils are typically better at maintaining film strength to protect engines at high temperatures. ![]() Thin, low viscosity oils flow easier to protect engine internal parts at cold temperature. This is quite important, as engine oils naturally thicken as they cool and thin as they are heated. Once again, the lower the number, the thinner the oil - a 30 weight oil is thinner than a 40 weight oil at 100 degrees, and so on. The viscosity limit is set and all oils (regardless of brand) with a viscosity number must achieve these limits. The number following it must be the higher temperature viscosity, taken at a temperature of 100 degrees. ‘W’ stands for winter, and the lower the number beside it represents the better the oil’s cold start performance. This has two viscosity grades - 10w and 30 - which gives the best of both summer and winter viscosity characteristics, and eliminates the need for both ’winter’ and ’summer’ oils as used in past. So, let’s use 10w-30 as a popular example. The viscosity index of oil is rated by its resistance to flow. We take a look at what do the multi-grade numbers and letters on the oil pack mean. Smart Charge – Intelligent Battery ChargerĪA Members often ask us questions like: “Can I use diesel oil in my petrol engine?” or “What type of oil should I use?”Īside from the obvious petrol vs diesel engine oils and multi-grade uses, there a two main oil qualities based on what they are made up of: Mineral and Synthetic.This said, unless extended service has been demonstrated and claimed, Castrol advises that motorists always follow the manufacturers’ recommendations for oil specification and grade as well as oil change interval. Use the following guide from Castrol to explore all available motor oil types. Such lighter grade oils require the use of synthetics to achieve the low temperature oil flow requirements of the 0W grade, and to ensure oil volatility or burn off is controlled when using lighter viscosity base oils.įull synthetic motor oil, being higher in performance than conventional oil, will generally provide better protection should an oil drain interval be inadvertently extended beyond the manufacturer recommendation. Lastly as vehicle manufacturers strive to deliver higher level of fuel economy and lower carbon dioxide emissions, lighter oils have been introduced into the marketplace such as SAE 0W-20 and in select applications SAE 0W-16. In addition, by recommending approved dexos fluids General Motors are requiring synthetic technology motor oils. European Manufacturers have long specified oils that are full synthetic. Today, many vehicle manufacturers are specifying motor oils that require synthetic formulations. With this part synthetic oils can provide enhanced performance somewhere between conventional and full synthetics. ![]() This is different than regular motor oil which utilizes base oil that are more dependent on the properties of the crude oil used to produce regular mineral base oils. For a part synthetic blend, the base oil in the motor oil contains a combination of synthetic and conventional base oil components. In a full synthetic motor oil, the entire base oil content is comprised of hydrocarbons that have been transformed or synthesized into new stronger molecules. Today motor oils are classified as full synthetics or part synthetics. This is why every engine will benefit from a full synthetic motor oil whether required through the manufacturer’s specification or not. In turn, a synthetic motor has many advantages over conventional oils and is better in performance in many areas compared to regular motor oil. Synthetic motor oils can also offer improved protection when operating vehicles under high stress and load such as towing, hill climbing, and quick accelerations. Enable the formulation of motor oils that offer better low temperature performance. This includes better low temperature pumpability, start ability and oil flow.Can provide enhanced viscosity control to better resist engine shear forces and help prevent viscosity grade breakdown.Enable greater deposit control protection improving engine cleanliness.Deliver better protection from oil burn off or evaporation loss/volatility. This helps to improve oil consumption control.This enhances the motor oil ability to resist thermal breakdown. Provide improved protection from high levels of engine heat delivering better thermal stability.What’s the difference between synthetic and conventional oil? Synthetic motor oils are better in the following key areas: Synthetic motor oils have been marketed and recommended for many years and are well recognized as delivering better performance vs. ![]() Is Synthetic Motor Oil Best For Your Car? ![]()
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