Hi Kenny, In this post (https://priuschat.com/threads/cleaning-fuel-injectors.189170/#post-2651556) you advocate using top tier gasoline in the Prius. I assume you mean 91 octane. Doesn't that defeat the purpose of a fuel economy car? Or do you mean buy 87 from reputed sources only. If so, can you clarify which sources you consider trustworthy?
