for now i have added the tecron to the fuel. hopefully if the weather and time allows this weekend, i will change the fluids in the diffs and change out the u joints and have the tires balanced. as far as rpms, i don't have a tach for accuracy, but there isn't a noticable change in rpms while it is in park, but i have noticed it burp a time or two while it is in drive sitting at a stop light. thanx for the input