How important is it for me to use premium gasoline?
What is your question?
The owner's manual says premium gas only, but, I heard that regular gas is now much better than it used be. Do I need to keep spending the big bucks at the gas pump?
RepairPal Certified shops can diagnose and repair your 1998 Jaguar XJ8. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.