AMSOIL 10W40 Zrod with WIX or K&N Filters.
However, I track mine in the hot summers and was recommended to use at least 5W40 for hot track work.
Was using AMSOIL 5W30 before then.
I also change my oil halfway through track season with about 1500-2000 miles on the oil.
But that is specific for me and my use case. Like most have said already, changing the oil regularly with good oil/filters is the more important then what you use.
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2013 1SS/1LE
Corsa Extreme cat-back, Speed Engineering LT Headers with black ceramic coating, C7 Z06 Front Brake Upgrade, Mishimoto Oil Cooler, BMR Tunnel Brace, Mishimoto Oil Catch Can, MSD Plug Wires, Mishimoto Radiator and Hoses.
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