Many drivers look at cheaper motor oils to save money, but the official guidance for most modern vehicles is simple: use the oil the manufacturer specifies. Across a global network of automotive service experts, the message is consistent—price should not override engine protection, reliability, or long term performance. The recommended lubricants are chosen to match exact viscosity, additive packages, and stability across the engine’s operating range. Using oil that fails to meet the OEM specification can compromise lubrication, reduce fuel efficiency, and affect emissions. For vehicles in Canada and the United States, the specific oil type and viscosity are listed in the owner’s manual or on the oil fill cap, along with the correct API/ILSAC standard. Keeping to these specifications helps preserve warranty coverage and ensures dependable operation through both summer heat and winter cold.
Climate plays a major role in choosing engine oil. In regions where winters are consistently extremely cold, the temperature at which oil remains fluid matters as much as its ability to lubricate when the engine warms up. If regional winter temperatures do not drop below -25 C and the automaker permits mineral oil for that vehicle, switching can be considered. In most cases, however, automakers in North America require synthetic oils or synthetic-blend formulations that perform reliably in very low temperatures and provide protection during cold starts. The recommended viscosity should be checked in the owner’s manual because cold-weather performance depends on the grade chosen. For example, many vehicles in Canada and the northern United States specify thinner grades such as 0W-20 or 5W-30 to ensure smooth starts. Going against these guidelines can shorten engine life, affect warranty coverage, and reduce reliability in extreme weather.
High oil level can be as problematic as low oil. A trained technician notes that overfilling the engine can cause foaming, reduced lubrication, and potential seal leaks. In winter, when a driver makes short trips, the oil level may appear higher on the dipstick. This happens because fuel can evaporate slowly and moisture or other contaminants may not have time to burn off fully during short runs, leaving the oil cooler and pan with a splash of diluent. To verify the true level, the engine should be allowed to reach its normal operating temperature and then checked again after sitting. If the level remains high even after proper warm-up, it is wise to have a professional inspect the engine, oil system, and venting to rule out overfill, fuel dilution, or other issues.
Beyond oil choice and level, motorists should pay attention to signs of an aging oil system. Unusual engine noises, fluctuations in oil pressure readings, or a drop in fuel economy can point to issues such as an incorrect oil grade, a clogged filter, or leaks. Using the wrong oil can also influence the lubricating film around camshafts and pistons, potentially accelerating wear in engines with high mileage. Regular oil changes using OEM-specified products, combined with a high-quality filter, help maintain engine cleanliness and performance. For drivers across North America, adhering to the recommended service intervals increases reliability, especially after long trips or severe winter driving.
To keep engines healthy through the seasons, motorists should adopt straightforward maintenance habits. Always consult the owner’s manual before swapping lubricants, and choose a reputable brand that meets or exceeds API/ILSAC standards. Oil type and viscosity should be changed according to the recommended schedule, factoring in climate, driving conditions, and vehicle age. Synthetic oils can offer superior protection against burn-off, sludge formation, and viscosity breakdown in the extremes of winter and heat, but only if the OEM approves their use for that engine. A simple rule of thumb in North America is to follow the maker’s specification first, then adapt to local weather by using the advised viscosity range and a high-quality filter.
Bottom line: follow the automaker’s oil specification, consider climate and engine wear, monitor oil levels carefully in winter, and work with a trained technician if there is any doubt about the right lubricant. Doing so helps ensure smooth starts, reliable operation, and longer engine life across Canada and the United States. Source guidance: automotive service industry recommendations.