Should I use premium or regular gas?

Asked by Stefan May 27, 2018 at 06:34 AM about the 1983 Cadillac DeVille Coupe FWD

Question type: Maintenance & Repair

Well every since I got it I’ve been using regular number 87,
and I’ve heard that Cadillacs should take premium. It
didn’t come with the owners manual so I can’t just look in
there as I would expect that’s where it would say so at.
I’m still new to cars so I’m just coming here for a little bit
of info and understanding thanks.

1 Answer
195

Kyle answered 5 years ago

You should fill it up with premium. If you use unleaded on this model, the engine will not run to it's full potential, and could even knock.

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