Hello, Cab. I'm not going to burn anything up, just looking to get some additional data so I'm reading plugs for just one weekend and not four. I can't see spending a lot of money for an electronic tool, especially when 90% of the reviews I read say the O2 sensors don't last long reading pig rich exhaust. And I'm not trying to run faster, I'm trying to run cleaner. For the most part I want to see what's happening off-idle. My biggest issue may be that I'm trying to get a razor tune on ethanol blended pump gas - it seems the octane levels can be all over the map.