Clean and fresh engine oil is vital for your vehicle's performance, but if you are new to adding it yourself, here's what the "W" stands for.
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The Codes You Absolutely Must Know When Buying Engine Oil
If you've ever performed your own oil change at home or even just popped the hood to check your oil level, you may have noticed the mix of numbers and letters emblazoned on your engine oil fill cap or the bottles of fresh fluid. Common engine oil codes include 10W-30, 5W-30, and 0W-20, but, in reality, there are a huge number of different motor oil classifications and types.