I have an 07 GXP with 167,000 miles on it. I love this car and everything operates as it should, however, I do foul plugs at one every couple years. I believe the #1 plug may be a little over a year between changes. I don't have to add oil real often. So no estimate of how much I use, I really don't think is much, So my questions are;
1. Does this sound like a horrible issue? I have read quite a bit about the foul issues,don't have a gauge as to how bad I have it.
2. Is it too late for a tune to disable the DOD?
3. If I do tune to delete DOD, would that require removing all of the DOD hardware from the engine?
4. Is it too late for the catch can addition?

Thanks much for any info, advice!!