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International Automotive Technicians Network
Re: Castrol Webcast 1 - View on Demand
Posted to Industry Events Forum on 1/21/2020

GM and Ford have both added more stringent low temp pumping and cranking requirements to their oil service ratings. This effectively made their 5W-XX approved products thinner than other 5W-XX products (at least at 30F-40F below 0). Both companies apparently f... Login to read more.