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oops, I see 25K on that post so I am going to assume that it will be a TSO
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Not sure what this means; TSO is Amsoil's 35K 0W-30. Each formulation gets a unique 3 digit letter code. ASL = 5W-30, ATM = 10W-30 etc.
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Got it from the horse's mouth that Amsoil's 0W-20 25K oil will be released 01 March!