Can I use regular fuel instead of premium ? on 2000 Cadillac Eldorado

I have a 2000 Cadillac ElDorado w/ 105,000 miles.

Asked by for the 2000 Cadillac Eldorado
2 answers
I think Cadillac called for 91 octane on that car the engine has a knock sensor and diminishes performance if it detects detonation due to lower octane fuel. Check your owner's hand book and or call your Cadillac dealer see what they advise.
yes caddys 2000 and newer can run on regular gasoline the computer will adjust for it