We've been getting our fuel from a local ValvTeck dealer, but after seeing their additive was less than impressive in the Spicer Test, I'm interested in supplementing for lubricity. I'm not interested in loosening up 38 years worth of crud laying harmlessly on the bottom of our tanks, if that's what could happen. Am I on the right course here? Would the additive linked be a good one? Thanks for any input, Regards Craig. ... https://www.amazon.com/Opti-Lube-Sum...ustomerReviews