What octane to use?

[Ray Mead]

I've had my 2002 for about 3 months..... bought it with 15,000 miles on it and LOVE IT!! Anyway, I have been using 89 octane since I bought it and it has been fine. I just, accidentally, put in a tank of 87 octane and drove it from NC to Penna and it ran great......... any thoughts????? Ray Mead (White 2002 with FULL COLOR interior)

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[00mustng]

......If the manufacturer is asking for 91 octane....then that's what I use.....You are still under warranty?.....seems most DOHC's drink premium...and have a higher compression ratio...... 😀

 

[saj]

Our fuel filler door has a sticker on the inside that says 91 octane. That's what we've always used.

However, others have posted that the engine will run fine on lower octane fuel.

 

[ajsam]

I run a quality 93 Octane Super or Sunoco Ultra 94 when I can get it. As for running 87 or 89, I wouldn't do it, there's no telling how much damage you'll do if that Lincoln engine gets to knockin' or pingin'...

 

[lacarnut]

If you keep using low octane gas, you better start saving up for engine repairs. 😱 😱

 

[SanDiegoTBird]

I don't know why you would not want to run a great engine at the recommended 91 octane level.
Heck, I even floor it at times!

cheers

 

[Blueoil1]

😎 I always use Premium. Why risk engine damage using a lower octane?