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Octane for 85 and 89 928s

  • 1989
  • 928 GT
Mileage: 
40 400
Fuel System
Lantzville, 
British Columbia

I believe the minimum safe Octane rating required for the 928 5.0 ltr engines is 95 Octane fuel.   I'm wondering if this is true.  The highest Octane availble from service stations around here is 94.  Is this of any long term concern to the life of the engines or is it just likely to effect performance slightly?

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