A Core deposit is a form of deposit you pay until returning your old part. If you don't have the core at the time of purchase, you must pay the core charge. That charge is refunded to you when you return the core.
Cyclo Octane Boost
12 oz Fuel Additive
Dual Action Formula
Boosts Octane & Cleans the fuel system for improved performance.
Helps stop knock, ping & run-on.
Excellent for helping reach maximum horsepower for towing, mountain driving, passing & performance needs!
Increases octane effect up to 3 numbers or 30 points.