Don't know why Pakistani people love to use 20w50 grade oil in there cars.....
Even i myself have seen some prius owners pouring in 20w50 oil's........ GOD knows why...
I am against the use of 20w50 oil's.... 10w40 oils are good enough to keep the engine in good condition and also protects the engine better than the 20w50...
But all the people think that 20w50 provides good protection salute to all of them...
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