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Message: <blockquote data-quote="creed1" data-source="post: 18739908" data-attributes="member: 45736">Multi grade oil has two numbers, the first number, e.g., 5W (W is for Winter) is the equivalent weight at low temperatures, and the second number, e.g., 30, is the equivalent weight at operating temperatures.  The major difference between 5W-30 and 10W-30, then, is the viscosity it has in cold temperatures. At operating temperatures, the two grades have the same viscosity, so it makes little difference most of the time.5W30 oil runs better under colder temperatures than 10W30. Most newer cars recommend 5W30, but allow 10W30 if the car will not be operated in weather that is below freezing. Many older cars were designed to use 10W30, using specific bearing and design tolerances. Below is what I found at the source link. I have never heard of switching to 5W30 simply because of the age of the car.මචන් අපි ඉන්නේ ලංකාවේ. වාහනේ ජපන් domestic . ඉතින් මචෝ පොතේ තියෙන්නේ ජපානෙට දාන oil . ඒකනිසා ගොඩක් වෙලාවට 10w 30 වගේ දාන්න . නැත්නම් රත්තරං අයගෙන් පොඩ්ඩක් අහන්න. හොද එකක් කියයි. hybrid allergic උනාට මිනිහට උදවුවක් දෙයි.0W-20 ලංකාවට හරියන්නේ නැත.</blockquote>

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