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$20 for a five quart container of Mobil 1 at WalMart .........
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you are probably correct - under normal conditions/circumstances .... for an automobile ....... it is probably a 'wash' ........
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although - for someone that desires to use a multi viscosity oil with a significant 'swing' .... not so much for 10w30 - but maybe 5w30 ....... 10w40 .....5W40 .... .. 20w50 .......... the synthetic oil is a much better choice. Conventional multi vis oils with a large 'swing' are compromised by the addititives that enable them to reach their viscosity properties. Synthetic oils do not require the same (type) or amount of additives to enable them to meet these properties.
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I could go on and on ........ about additives ...... long chain polymers .... phospherous ...... sulphur ....... or is it perposterous and sultan ....... viscosity index ...... but it is boring ........
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