Lifetime Supporting Member
Join Date: Apr 2003
Location: Henderson, NV
Bullitt Year: 01
Bullitt Color: Dark Highland Green
Bullitt Serialized Number: 3863
I have been running 89 (Plus) in the car since I had engine knocks the first month or so. After that I haven't had any issue since and that was 18 years ago. I've only put Shell gas in the car.
89 or 91 would be fine. as far as 91 goes, depends if you want to spend the extra money.
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Mods: 275/40/17s & 315/35/17s GY Eagle F1 GS-D3's, billet Alum. hood scoop & grille, K&N Air filter, Motorcraft oil filter, MRT hood struts, shorty antenna, and MGW Ltd.,EJECT button