NAVIGATOR FUEL OCTANE

2000 All Other Makes All Other Models

Tiny

smsgt178

January, 6, 2006 AT 11:29 AM

I would like to run regular unleaded in my recently purchased 2000 Navigator. I have a 1998 Navigator which I've ran 87 octane in since I've owned it with no problems so far. I know the 2000 has a higher horsepower rating and was concerned about any engine damage I might incur from running a lower octane gas than what is recommended by the manufacturer. I believe the 2000 still has a knock sensor and engine computer management to handle the octane situation, but want to be sure before changing over.

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2 Answers

Tiny

smokinfloyd4.3

January, 6, 2006 AT 12:36 PM

All modern vehicles are designed for 87

Tiny

rjt1210

February, 11, 2006 AT 9:42 PM

Not necessarily the case. My '97 Mark VIII ran well ONLY on 92 octane or higher which was [u: af821e28d0]recommended[/u: af821e28d0] in the owner's manual. It wouldn't run right if I used 87 or 89 octane. And a '95 Continental I owned was premium fuel ONLY (not just recommended, but [u: af821e28d0]required[/u: af821e28d0]!).

I've been thinking about running 89 octane in my '98 5.4L Expedition. Haven't decided yet.

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