I got 36k miles on my ilx when i bought it, from what ive read 30k is when you need to do a drain and refill (2.8qts). << is this true?
and what size is the drain bolt?

 

My 2016 ILX has 210,000 km (130,000 miles) and I have done 2 transmission fluid changes since I got the car new.

First one was done around 110,000 km (70,000 miles) and second one was done at 190,000 km (118,000 miles).

My suggestion is to wait until maintenance minder tells you (3 is the code for Transmission fluid change).