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Originally Posted by Sooner Cole
Good information to have. However, the ZL1-1LE factory fill is 5w-30 and you switch to 15w-50 for track events and then back for street. I hope the new oil makes this switch unnecessary? I haven't seen any specific info on the new oil and the ZL1-1LE. Maybe someone has a can join in here. Also, the new oil isn't available everywhere yet and it is running about $12 a liter from the dealer.
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Will edit that! Thank you. I'm a dealer and according to what we were told all GM dealers should be able to get it. Most of them should have received some already.