2006 Honda Civic premium fuel

2006 HONDA CIVIC
10,000 MILES • 4 CYL • 2WD • MANUAL
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JUZTIN_RF
  • MEMBER
  • 1 POST
my civic si calls for premium gas.
my questions are if i don't use premium but mid grade or even regular, what will happen to my car?
what if i use mid grade but pour octane booster in the tank? will that help the mid grade instead of paying $3.50 a gallon for premium?
Apr 9, 2008 at 4:50 PM
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MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
Hi there,

if you use a lower grad fuel, you engine management system will adjust it self for optimum performance, but you will get far better mileage and value for money using premium fuel.

Mark (mhpautos)
Apr 9, 2008 at 5:24 PM
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