Awesome. So to choose what you want to log [while testing], run obdgpslogger with something like [for example]:
When you decide you want that permanantly, edit /etc/obdgpslogger [or $HOME/.obdgpslogger - look at man dot-obdgpslogger for details] and put in a line like:
Note that you can also add this line to your config file to save some typing:
Is there any reason no to log all possible columns at all times?
Columns are sampled one at a time, and depending on your device, you're looking at maybe 20 samples per second.
So, sure. Sample everything, but keep in mind you can only sample one row at most per second if you sample 20 things. For my shame, obdgpslogger also considers a row to be sampled instantaneously, so if you sample lots of things, keep in mind that the columns at the end may *actually* be at a significantly different time to the columns at the start.
Also, some of those values won't change, ever, so logging them feels wasteful. For example, in your corvette, obdsup, o2sloc should never change.
.. in conclusion, suck-it-and-see. Log everything if you like :-)