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Any opinions on Super Tech vs Traveller oils?

Hello, I bought a 1997 Itasca motorhome with a L29 454 engine. Roller tappets 290HP 410Torque. I have been looking at the "Chevrolet Motor Home Chassis Service Guide" that came with the MH. The 'preferred' oil above 40F is straight 30 weight SH oil. I live in deep south Texas or as we call it...