Would old oil make my 84 honda shadow run bad?

Would old oil make my honda shadow run bad it starts missing when it warms up and i've checked the coils carbs are great and running out of things to check

Checked the plugs?

Clean, shiny, not old?
Gapped correctly?

Fuel flow good?
Vent in fuel tank cap not clogged?
Fuel filter good?

Air-filter clean and not restrictive?

"OLD" Oil is never good for ANY Engine… It "breaks down" and gets polluted. Change it if it needs to be changed.
When did your engine start missing? How long have you owned it? How long since it ran right?
If your engine is WORN, it may start up o.k. Cold and degrade as it warms up.
Could even just be bad gas or fouled fuel line.
Too many variables and unknowns here. But start with fresh oil including a new Filter. ANY engine runs better with fresh oil.

I guess anything's possible, but I can't imagine how old oil could make an engine miss.

Well one, oil IS required on All motor's in order to properly operate. Two, did you change the oil son? Because even though oil is essential to all machines, oil for them is like milk for us, it's essential, but if you use it when it's past due, you're gonna have a bad time.3, yes indeed, old and or low oil levels will burn your motor pistons/inside/etc., I know, ol' scooter of mines got fried.4. Have you checked your fuel lines? Food for thought 5. Lastly, just take it to a shop and get a full tune up. 6. Refer to number 7. 8. Try an oil change, 9. You didn't realize I skipped 7. 10. You checked if 9 was true. 11. You just smiled, realizing that you have just been lightly been trolled.

Any suggestions would be great

Depends

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