The problem is, does lean for taxi going to cook the cylinders?
Does 1200 provide enough cooling when stationary?
I think it's the Piper PA28 manual says something like 'don't idle for more than 2 minutes summer or 4 minutes winter'.
Why, will the engine overheat.
Also no requirement to see oil temp rise into green.
If throttle responds without hesitation, take off.
Unlike some checklists that say t & p's green, well if the temp. isn't, going to sit there for 10 minutes warming engine.
Plug fouling more likely due all the rubbish recon engines burning oil.