My truck is stock (for now) with the exception of LT headers and Bassani cat-back. I've noticed that the stock programming is very rich, as noticed by the great amount of black soot collecting at the tips and on my ground effects. Should I be worried that with so much fuel being dumped in by the factory, that the cylinder walls are being "washed down" by the fuel and/or my oil supply is being contaminated? Will the installation of a 160 degree thermostat, 4# pulley w/out chip, colder plug combo magnify this problem? Thanks in advance for any info.