So, I had been getting crappy mpg of 10-11.5mpg when calculated manually. Recently ran my tank down to 1/4 and dropped in an entire bottle of Gumout Regane HM, pretty popular on Bitog...Ran that for 2 days and then filled tank and ran another 5oz through the full tank. So far per manual calculation, I am at 13.8MPG on two different tanks. More importantly, what I thought was a transmission issue and it being sluggish has gone away....I just noticed this tonight as I was doing quite a bit of driving around for Xmas festivities....Which reinforced the mpg gains and me thinking it was just a placebo effect. Plan to run Kreen through the next OCI. If all goes well, then I will go through the intake and knock sensor/harness situation.