91 or 93
87 octane.
The 2002 Jaguar XK8 is designed to run on premium unleaded fuel with an octane rating of 91 or higher. Using fuel with a lower octane rating may affect performance and fuel efficiency. For optimal engine performance and to prevent knocking, it's best to stick with the recommended octane level.
Unleaded...if it's a stock engine you can run 87 octane.
Each car should have a recommended fuel octane in the owners manual.
According to the 2002 Lincoln Continental Owner Guide : ( " premium " unleaded , 91 octane or higher is used )
Premium unleaded 98 Octane
I would run a mix of 32:1 with 89 octane fuel.
Premium. Octane rating of 91 or higher.
87
87 octane should be sufficient
Probably but you should use the grade recommended in the owners manual. All of the sensors and the computer are calibrated to the recommended fuel.
with an octane mesurer