Suggestions for Fuel Octane levels
Thread Starter
8th Gear
Joined: Feb 2006
Posts: 8
Likes: 0
From: Rogers AR
Suggestions for Fuel Octane levels
I've had my 2000 coupe for about a month now, and I'm wondering if anyone has experience with different fuel types. Is there much difference in octane levels? Should I use one over the other?
Pro
Joined: Jan 2004
Posts: 516
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From: Long Island ny
St. Jude Donor '06-'07
Well the owners manual says minimum 91 so there you go. Anything less will result in poor performance and lower gas mileage. I use 93 as it is highest widely available in my area. I understand 91 is the highest available in some states.
Melting Slicks
Joined: Jul 2004
Posts: 3,353
Likes: 0
From: Richmond Hill Ontario
I use Sunoco 94 in my area and have never tried anything less, sometimes I wonder if I am pissi_g my $ away on too much Octane? I have never tried it but my guess is 91 is just as good 
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No problems with 91
Safety Car
Joined: Oct 2004
Posts: 4,816
Likes: 132
From: Plano TX
I run 95 octane in mine. Timing is advanced and will ping on 93. I use Chevron with Techron. I think Texaco now has Techron in their gasoline too. Techron will help keep your fuel sending unit free of sulfer deposits, which causes our fuel gauges to give wacky readings. This is a very common problem with the C5.. If you can't find a Chevron or Texaco you can add a can of Techron to your tank 1 once a month. Its available at any auto parts store.
Safety Car
Joined: Jul 2001
Posts: 4,661
Likes: 67
From: Ocean Springs MS
Originally Posted by hdff
the way things are going 93 will be $5.50 a gallon before long.........thanks W
Racer
Joined: Jul 2005
Posts: 301
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Waste Of Money
Originally Posted by Tino
I use Sunoco 94 in my area and have never tried anything less, sometimes I wonder if I am pissi_g my $ away on too much Octane? I have never tried it but my guess is 91 is just as good
Racer
Joined: Jul 2005
Posts: 301
Likes: 0
Cmon Nowwwwwwww
Originally Posted by fdxpilot
But it will still only bw $0.20-.30 more than regular. That little bit of change is not worth screwing with your performance.
Safety Car
Joined: Jul 2001
Posts: 4,661
Likes: 67
From: Ocean Springs MS
Originally Posted by DRJJ1
LIKE YOU RE A SUPER DUPER SPEED RACER AND YOU NEED EVERY EDGE POSSIBLE,,INVEST IN A BIGGER JOCKSTRAP
No, I've had the car tuned, and it was set up for 91 oct. I take a serious timing hit if it drops to the low octane fuel tables. But feel free to run around on the low octane tables if you like.