Check the listing for details. Chevron Techron High Mileage Fuel System Cleaner, 12 oz, 2 Pack, Free Shipping. Condition: New, Made in USA. Listed at 18.70 USD. As vehicles rack up higher mileage, they naturally face age-related issues like carbon buildup, corrosion, and deposit formation in the fuel system. These problems can lead to reduced performance, rough idling, hard starts, and even higher maintenance costs.Techron High Mileage Fuel System Cleaner is specially formulated to combat these issues and help your engine run like new—no matter how far it has traveled.As vehicles rack up higher mileage, they naturally face age-related issues like carbon buildup, corrosion, and deposit formation in the fuel system. These problems can lead to reduced performance, rough idling, hard starts, and even higher maintenance costs.Techron High Mileage Fuel System Cleaner is specially formulated to combat these issues and help your engine run like new—no matter how far it has traveled.