Check the cylinder head temp sensor in live data. See if it’s reading accurate. If it’s bad they’ll often read something like it’s -40 and be quite hard to start.

Do it once a year

What work was done? Some work warrants an oil change, like if you had a leaking fuel injector and it washed out the cylinder and fouled the oil, or something had to be removed that got some coolant in the oil.

All wrong, but. 3 is maybe a grey area. 3 I’m sure technically there’s a torque spec you should use, but it’s one of those things nobody does. Tighten and check for leak, but yeah by the book there’s a torque spec.