XS-7 & Blue-9 Fuel Injector Ultrasonic Cleaning Fluid Combo – 1 Gallon Each

FUEL INJECTOR  ULTRASONIC CLEANING FLUID, BLUE-9, XS-7

This combo pack pairs PROCHARGE's two flagship fuel injector cleaning fluids so your shop is equipped for every job that comes through the door — from a routine 15-minute maintenance clean to a fully seized, non-pulsing injector that needs hours of soak time.

What's included One gallon of XS-7 and one gallon of Blue-9, both full-strength concentrates. Makes up to 32 Gallons.

XS-7 — Fast, No-Heat Cleaning Developed and refined over two years to be the industry's answer for restoring injectors to spec, XS-7 is formulated to be aggressive enough to strip carbon, varnish, and gum deposits, while still being safe on injector internals. Run it in your ultrasonic cleaner for 10–15 minutes — no heat needed. Because it works fast, injectors should not be left submerged beyond the recommended cycle.

Blue-9 — High-Heat Soak for Stubborn Injectors When an injector won't pulse at all or is completely closed up, XS-7's quick cycle isn't the right tool — that's where Blue-9 comes in. It's a gentler chemistry designed for extended, high-heat soaking. Submerge the injector in heated Blue-9 solution and let it work over several hours, pulsing the injector occasionally to help work the fluid through the nozzle. This slower, lower-aggression approach is what reopens injectors that other cleaners can't touch.

How to use

1. Dilute: mix 2–4 oz of concentrate per gallon of water in your ultrasonic tank (dilution applies to both fluids).
2. For routine cleaning and light-to-moderate deposits, use XS-7 for a 10–15 minute ultrasonic cycle. Do not leave injectors submerged past the recommended time.
3. For injectors that won't pulse or are fully clogged, use Blue-9 at elevated temperature for an extended soak, pulsing periodically.
4. Rinse and test injectors on a proper injector tester before reinstalling.

Also useful for: general parts degreasing where a fast, no-rinse-residue solvent is needed — many shops also use XS-7 and Blue-9 to break down carbon and powder fouling on carburetors and firearm/gun parts (actions, bolts, small metal components) in an ultrasonic tank, in addition to fuel injectors.

A quality ultrasonic cleaning unit is recommended for best results with either fluid — see our Ultrasonic Cleaners category for compatible equipment.

Industry note: the accepted discrepancy standard for a properly functioning fuel injector is 4%. Both fluids are formulated to help techs hit that mark.