Yes you can. Just be prepared for your power to drop off a little.
The 2001 Honda Accord runs on regular unleaded.
Nothing over E15 (15% ethanol) and it should be fine. It could run on E85 (85% ethanol) in an emergency, but it may damage fuel system components.
The 2001 Honda Accord uses 5-20. It should also be listed right on your oil cap.
I just called my local Honda Dealer and the parts person has told me that 2001 Honda Accord A/C system requires 21-23 oz of refrigerant (R132A). Kind regards.
The question is not can, but should you. Of course you can, but, should you? Use exactly what the owner's manual tells you to use.
Light can only be reset by the use of diagnostic equipment.
Use nothing but genuine Honda ATF DW-1. Do not use any fluid that claims to be a substitute or you will have rough shifts.
You can use DOT 3 or 4 in your car but not DOT 5.
You can use the 1990 stereo in your 1992 Accord, but the 1998 will not bolt in the correct way.
The 2003 Honda Accord runs on regular unleaded.
The 2012 Honda Accord runs on regular unleaded.
The 2009 Honda Accord runs on regular unleaded.