I have the AEM UEGO wideband gauge in a 98 T/A with a STS. The sensor is mounted 10" after the turbo, and 38" from the end of the tailpipe. Now that I am logging I am noticing that at WOT the gauge is reading 10 but the log file is reading in the 12's logging AFR. I am afraid to lean it out any further. Which is more accurate? Thanks