I mean cruising on a flat highway. 
This is what I am exactly thinking. I remebered I have close to 3000 before.particlefx said:I came up with about 2850 (give or take 10). I found a flat stretch of highway and set the cruise control to 79 and the speedo says 81 (I've posted about the discrepancy before and it sounds common).
Interesting that we have about the same car configuration. Do you think the grounding kit had an effect?