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Cobra Forums
The Terminator
Engine/Tuning
Pro's of using Mobil 1 5w30 over 0w20?
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<blockquote data-quote="5500" data-source="post: 1941459" data-attributes="member: 25479"><p>Anyone know what the static "weight" of 0-20 is when its sitting in a crankcase of a cold engine at 65-70 degrees? If its designed to be 0 weight in a cold climate of 0 degrees, will a 65-70 degree increase cause it to "thicken" to 5 wt? Likewise on the other end, once engine is warmed up, will 30 wt cause problems?</p><p>Oil debates are truly fascinating but I have never heard an argument to convince me one way or another on the viscosity issue, at least when comparing an 0-20 to a 5-30. Though hard to believe, there is one Cobra owner who posts here who did lose an engine and did have warranty denied based on oil in the crankcase (denial was overturned after a long legal challenge), so warranty concerns are real. FWIW I use the motorcraft blend and change it very often (probably every two thousand miles or every other event as this seems to be when the oil starts to change color).</p></blockquote><p></p>
[QUOTE="5500, post: 1941459, member: 25479"] Anyone know what the static "weight" of 0-20 is when its sitting in a crankcase of a cold engine at 65-70 degrees? If its designed to be 0 weight in a cold climate of 0 degrees, will a 65-70 degree increase cause it to "thicken" to 5 wt? Likewise on the other end, once engine is warmed up, will 30 wt cause problems? Oil debates are truly fascinating but I have never heard an argument to convince me one way or another on the viscosity issue, at least when comparing an 0-20 to a 5-30. Though hard to believe, there is one Cobra owner who posts here who did lose an engine and did have warranty denied based on oil in the crankcase (denial was overturned after a long legal challenge), so warranty concerns are real. FWIW I use the motorcraft blend and change it very often (probably every two thousand miles or every other event as this seems to be when the oil starts to change color). [/QUOTE]
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Pro's of using Mobil 1 5w30 over 0w20?
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