What's the difference between synthetic oil and regular oil--and does weather really affect oil?
Your engine's needs really do change under different weather conditions. For example, cold weather means the oil in your car will have a harder time circulating and cold starts are one of the toughest engine conditions--that's one time where a lot of damage can happen to the heart of your vehicle. But, when it's cold, we tend to let our cars idle more to warm up--and this can actually cause an overheating condition! So, one thing that I recommend year round is switching to a synthetic oil. Synthetic oil is specially formulated to provide extra protection in severe conditions, and is relatively cheap insurance for your engine.
For the best engine protection, change your oil every 3,000-5,000 miles