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I'm not checking the thread today to see if anyone said this but not all 0w30s and 5w30s are alike, motor oil numbers are general terms meant to describe viscosity ranges and they can vary. For one common example Pennzoil Platinum 5w30's literally thinner when cold and hot than Mobil 1 0w30, the publicly available data sheets tell this. Even oils within a brand's product line can vary, Shell T6 comes in 0w40 and 5w40 and they're both different at the same temperature; 0w40's the thinner one.
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