Rislone 4700 Hy-per Fuel Complete Fuel System Cleaner, 16.9 oz.

Rislone 4700 Hy-per Fuel Complete Fuel System Cleaner is a multi-purpose additive designed to restore engine smoothness and fuel efficiency. It addresses common drivability issues like rough idling, hesitation, hard starting, and noisy fuel injectors or pumps by cleaning and lubricating the entire fuel system.

The formula works as a six-in-one treatment, replacing separate bottles of injector cleaner, upper cylinder lubricant, fuel stabilizer, dry gas, gas treatment, and octane booster. In addition to boosting octane and stabilizing fuel, engine dynamometer testing shows that it improves fuel economy by keeping internal components clean and lubricated.

Regarding limitations, the listing specifies that long-term benefits like reduced emission control and fuel system repairs rely on regular use. The product is packaged in a single 16.9 oz bottle, but the data does not specify the exact fuel tank capacity or gallon treatment ratio per application.

Verdict: Rislone 4700 is an effective, all-around fuel treatment for drivers dealing with hesitation or noisy fuel components. It is EPA registered, safe for catalytic converters and oxygen sensors, and will not void new vehicle warranties.

A great fit if you:

• Notice engine hesitation, hard starting, or a rough idle
• Want a single bottle that boosts octane, stabilizes gas, and cleans injectors
• Need a fuel additive that protects upper cylinders and quiets noisy pumps
• Drive a vehicle with catalytic converters and oxygen sensors

Consider something else if you:

• Need a dedicated treatment for non-gasoline fuel systems
• Prefer buying additives in bulk containers rather than a 16.9 oz bottle

Will this product void my new vehicle warranty?
No, it is EPA registered, exceeds EPA compliance performance criteria, and will not void your manufacturer new vehicle warranty.

Is it safe for vehicles with emissions equipment?
Yes, it is completely safe to use in vehicles equipped with oxygen sensors and catalytic converters.

What treatments does this six-in-one formula replace?
It replaces standard fuel injector cleaner, upper cylinder lubricant, fuel stabilizer and conditioner, dry gas, general gas treatment, and octane booster.