"Winter Weight" for Oil Doesn't Involve Those Extra Holiday Calories
Having the correct weight oil in your vehicle can not only help extend the life of your engine, but it can also assist in starting on cold winter mornings.
In areas where the temperatures during winter months do not get below 45°F, changing the weight of your vehicle's oil will likely not effect performance. However, if average temperatures during colder months drop below this point, changing the weight of oil can help your engine's starting and performance in lower temperatures.
First, check with manufacturer specifications to insure that you vehicle is compatible with using 5W-10. Most vehicles are typically compatible with both 10W30 and 5W30 oils. However, make sure to follow your manufacturer's recommendation.
If approved for your vehicle, change to a 5W30-weight oil for the very cold months. Doing so will insure that the oil flows better, and doesn't get as stiff and thick as 10W30 in cold weather. This can make the difference between your vehicle starting or stalling during cold months. The oil will flow more efficiently, and get to the motor faster with a lighter-weight motor oil. In addition, changing your oil before the temperatures drop will insure that it is free of dirt and foreign objects that increase friction in your engine making it harder to start.
An additional tip is to use synthetic oil instead of conventional motor oil in your vehicle. Using a synthetic oil allows you to keep the same weight of oil in your vehicle in both summer and winter months. Synthetic oil flows better than conventional oil regardless of the weight.