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As we were walking the pits and talking to various teams, we came across one car owner who was pouring AMSOIL oil into his modified. I swear this was not staged. He told me he always runs this oil and that it keeps the engine temperatures lower in his transmission and rear end. Running AMSOIL reduces heat and wear and prolongs the life of the gears and bearings. I'm just passing along what I was told. Sounds good to me.