Is UB still active? I messaged him but maybe he’s not here currently. I have a 15 GT with OPG/sprocket and Whipple stage 2 but otherwise the motors stock. I’m trying to decide between switching from Amsoil XL 5W-20 to either (signature Amsoil) 5W-20, 5W-30, 0W-40 or what. Cruising, a few drag passes a year maybe, mostly highway pulls or just living in the torque curve when there’s no one around. 93 pump gas, about to be dyno tuned when I add some long tubes in a few weeks. Curious what the gurus feel is best, especially since Amsoil just updated their additive packages.