Thanks for the information on the OLM. Is the ScanGauge2 worth the investment for the occasional tinkerer and DIYer? Or is this more something for a hardcore tinkerer and tweaker?
I think the answer for this is more of a personal choice. A lot of people do just about ALL if not ALL their own mechanical/maintenance work on top of their own modifications and tweaks. I personally feel that it's worth every penny. I do almost all the mechanical and maintenance plus mods on my truck like many other members here do(I said almost cuz hubby helps as he has more muscles lol). I also have a truck that just adores spending my hard earned cash, as we seem to have an issue every other week with it, so for me it's extremely useful.
Plus I live in a VERY VERY small town, and no one here owns a scan tool, even the BIG time mechanics don't have one, so if something were to happen where a scan tool is needed, I'd have to travel quite a ways. The closest scan tool is at O'reilly's, but the PCM has to be throwing a code in order for it to even read anything. Plus not to mention that dealerships can charge a freaking arm and a leg to diagnose a mechanical/electrical problem. It cost me almost $200 bucks just for them to diagnose a failing fan clutch, luckily my extended warranty paid for all those costs.
SO I think the decision is a personal one, but just know that it has been pretty damn handy for those who have spent the money for one, even if they aren't using it all the time, or even frequently at all, at least they have the peace of mind knowing that if there comes a time, or need...they will have one ready to go to work for them. It makes diagnosing issues of all kinds so much easier!