In article et, Dave
S wrote:

Every flying vendor I've ever been involved with or rented from
considered a checkout in a fixed gear 172 to apply to their entire fixed
gear 172 fleet.

I would argue for a separate checkout on the S or SP model based on the
pilot's experience with fuel injection and familiarity with the
avionics. If the pilot has previous experience with injected engines, a
one hour checkout would suffice. If the pilot plans to fly IFR with a
digital avionics stack, the checkout should include approaches using
the equipment. Pilot preparation time with the avionics manuals prior
to the checkout can aid in understanding and using the "switchology".

later 172's having more fuel sumps, starting techniques
for fuel injected engines,

Go point, I had forgotten to mention the 13 sumps on the new 172's.