5W30 vs 5W40 Oil: Which Is Better for High Mileage Engines?
If your odometer has long since cracked six figures, picking the right motor oil starts to feel personal. At that point, you’re asking whether your thirsty, older engine deserves something a bit thicker, something that’ll hang in there under pressure. In this comparison between 5W30 and 5W40, the question isn’t which is better in the […]
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