Purpose and Specifications

STP Ultra 5 in 1 Fuel System Cleaner is your all-in-one solution for keeping gasoline engines running strong. This 400ml (about 13.5 fl oz) bottle packs advanced synthetic detergents like PEA and PIBA that deep clean the entire fuel system, from injectors to intake valves, removing up to 71% of harmful deposits and restoring 95% of original injector performance. It fights engine friction by lubricating key parts like piston rings, helps save gas by preventing ethanol buildup, lowers emissions, and inhibits corrosion - perfect for turbo, direct inject, and hybrid engines.

• Deep cleans fuel system for smoother idling and responsive acceleration
• Reduces friction to cut wear and boost efficiency
• Prevents ethanol deposits that rob power and mileage
• Compatible with cap-less gas tanks; treats up to 80 liters (21 gallons)

Pour the full bottle into a half-full tank for easy use. STP, trusted for over 60 years, delivers real results without lab jargon.

When to Use / Replace?

Use every 6,400 km (4,000 miles) or at each oil change to maintain peak performance. Ideal if you notice rough idling, hesitation on acceleration, or dropping fuel economy. Safe for regular use in modern engines operating from -30°C winter starts to 120°C high-heat conditions. Unopened shelf life is 3-5 years in cool, dry storage.

Frequently Asked Questions

Can I use it in any gasoline car?
Yes, it works in all gas engines including turbocharged, direct injection, and hybrids - just add to a half-full tank.

How soon will I feel the difference?
Many drivers report smoother running and better response after one tank; full benefits build with regular use every 6,400 km.

Is it safe for my fuel system long-term?
Absolutely - it prevents deposits and corrosion, helping your engine last longer without harming sensors or caps.