1999 Cadillac Deville OCTANE REQUIREMENTS

Tiny
KENNYGLIN
  • MEMBER
  • 1999 CADILLAC DEVILLE
  • V8
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
With gas prices so high, do I have to use 91 octane gas or can I use 87 octane?
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Wednesday, November 5th, 2008 AT 1:54 PM

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Tiny
DOCFIXIT
  • EXPERT
Try 87 if no knocking your good.
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Thursday, November 6th, 2008 AT 9:41 AM

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