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<blockquote data-quote="potato" data-source="post: 3962684" data-attributes="member: 82336"><p>This is so confusing. So even on normal cars the thinner the oil the better? I always though the bigger the range the better, at least price wise they are much more expensive.</p><p></p><p>From normal intepretation, the lower number means how well it can perform on cold start/winter while the higher number means how well it perform on hot temperature. Normal intepretation would be normal cars require lower high value while performance car require higher high value.</p><p></p><p>So the article is saying lower the number the better (thinner), it is the flow that lubricates so thinner the oil higher the oil flowrate & also better cooling, & F1 cars operating under extreme high engine temperature are using such low number oil (straight 5 & 10), so what is the reason everybody using 0w-40, 10w-40, 15w-50 oils (the writer say this is not optimal)? Should we all be switching to 0w-30, or even straight 20, 10? Or normal cars are not like Ferrari & require thicker oil, then again the article says it's the flowrate (thinner) that counts, so why the article still recommending 0w-40 for urban drive, while the writer himself uses 0w-30?</p><p></p><p>This article totally denied the purpose of having ranged rated engine oils, and normal norms of choosing engine oil.</p><p></p><p>I hope anybody who fully read thru this article can help explain/clarify my questions above. I'm not doubting the writer (yet) just very confused.</p></blockquote><p></p>
[QUOTE="potato, post: 3962684, member: 82336"] This is so confusing. So even on normal cars the thinner the oil the better? I always though the bigger the range the better, at least price wise they are much more expensive. From normal intepretation, the lower number means how well it can perform on cold start/winter while the higher number means how well it perform on hot temperature. Normal intepretation would be normal cars require lower high value while performance car require higher high value. So the article is saying lower the number the better (thinner), it is the flow that lubricates so thinner the oil higher the oil flowrate & also better cooling, & F1 cars operating under extreme high engine temperature are using such low number oil (straight 5 & 10), so what is the reason everybody using 0w-40, 10w-40, 15w-50 oils (the writer say this is not optimal)? Should we all be switching to 0w-30, or even straight 20, 10? Or normal cars are not like Ferrari & require thicker oil, then again the article says it's the flowrate (thinner) that counts, so why the article still recommending 0w-40 for urban drive, while the writer himself uses 0w-30? This article totally denied the purpose of having ranged rated engine oils, and normal norms of choosing engine oil. I hope anybody who fully read thru this article can help explain/clarify my questions above. I'm not doubting the writer (yet) just very confused. [/QUOTE]
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