GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |

recommended fuel grade for SS?

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Old Apr 12, 2004 | 01:14 AM
  #11  
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my truck has a sticker on the fuel door that says premium only as well. I never tried anything less than 91 on my truck.

But, my dad runs 87 in his LQ9 escalade all the time with no problems, the manual in his truck says it is safe to run 87
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