Edge 10W40 vs 0W40

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24,432
Location
Dallas,Tx USA
Did Castrol replace the Edge 10W40 with 0W40? Walmart here replaced the quarts and jugs with the 0W40 and no longer carry the 10W40. Is there any real difference between the two? Castrol's site says "0 results" when I try to search their pds page. Maybe I'm searching their site incorrectly?
 
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