I've seen Scotty recommend preventative use for a car > 100k miles w/o problems, but another post from someone who encountered more errors, likely due to worn out parts being ungummed up by the cleaning (kind of like flushing an old torque converter).

https://carkiller.com/scottykilmer/qa/ats-engine-cleaner-fail-help/#post-162917

So here is my situation:

2008 CRV 160k miles, well maintained.  All scheduled service done, oil changes avg 5-6k miles (when the trip computer said to do so).

I have particular reason to think I have worn out parts or excessive ring gumming, would love to keep the car for a while longer and if this would help I'm all for it. I just dont want to run into the problem this poster did.

My regular mechanic has never mentioned oil consumption issues, but I haven't specifically asked. Should I ask him about that as well as if there is any reason to believe there are worn pistons or other things which could get worse if I run the cleaner?  What sort of worn parts besides pistons could be trouble?

Additional data point:

First start of the day, I sometimes smell a bit of gasoline in the exhaust as I back out.  Leaky injector?  Too much gas pedal? Would the fuel system treatment affect this?  It also takes an extra crank to turn over compared to subsequent starts, say 5 instead of 4.

I was thinking of running the fuel system cleaner once I resume commuting back into the office next month.

I was also thinking of arranging with my mechanic (parking is really tight) to show up, add the oil treatment, run the 15 min idle, then give the car to him to change the oil and filter.

I started going to this mechanic just before the lockdown and I started working from home so he may not have good data on oil consumption during a normal usage cycle. Should I drive the car for a while once I resume commuting and specifically ask about oil consumption at the next oil change?