Quote:
Originally Posted by floydarogers
No, the 5W-xx oils don't protect better because that number has NOTHING to do with "high heat and abusive driving conditions". The -30 or -40 is what does that.
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5W oil is thicker then 0w weight. the oil cannot have the same heat resistance and protection if it is fundamentally a thinner oil.
0w-20 will not offer the same protection compared to 5w-20.