Carbon in passenger side tailpipe
So I just picked up my new wifey (2012 is350 AWD) with 24mi and am now at around 600. I pretty much followed breakin procedure with the exception of some fairly hard, non-WOT, acceleration (I'm only human). I broke it in primarily on I-70 from Denver to Aspen and back which is a very mountainous drive, therefore never keeping the RPM's consistent. I also kept it under 80 with an average speed of probably 65-70. In addition, I always take it easy until she's up to running temperature.
I'm now noticing that there seems to be significantly more carbon buildup in the passenger side tailpipe compared to the drivers side. I see no oil level changes, smell no burning oil, and she purrs like a lion.
Should I be concerned with the carbon? All the opinions I've come across say that the carbon is normal etc.. but after owning a few Hondas I'm fairly familiar with the signs of oil consumption and if I've done or am about to do some damage like cylinder scoring I'd definitely like a heads up.
2012 is350 AWD