The engine is already clean... Using a different test fuel won't help anything.. I never have "warmed" an engine.. Unless it simply wouldn't go for a while. Short trips mean worse milage... Long trips keep the engine at it's best ecomony settings for a longer time so the milage is greater than short trips.
Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" />

professional bovine relocation specialist