Originally Posted by cruzinquick
That will depend how hard you are running and what gear? If your in D and just cruising at 75 mph, it should be very conservative. Your seeing my at WOT during a drag race. This shouldn't be on the highway unless your in Mexico. You should be in the 11's or 12's unless your running leaner. Remember at idle the car is factory set at automatically at 14.7 so that shouldn't freak you out. It's under load that you want to see where your readings are at.
let me rephrase that for ya, anything other then WOT should be 14.7:1 whether your idling, cruising at 20mph or 120mph. there will be some small fluctuation but the pcm constantly makes changes to the fuel tables to keep that ratio. once you push the loud pedal to the floor it all changes and then we see 11-12:1's