Royal Purple11722-2PK Max-Clean Fuel System Cleaner and Stabilizer - 20 oz. Bottle, (Pack of 2) by Royal Purple

I am very happy with my purchase and have been using royal purple products for more than 10 years with no remorse and all my vehicles have been running more efficiently and smoother than before I began using their products.

My old Buick LeSabre has had a lot of issues with fuel system in the past three years. I've had a mechanic get in there and do an overhaul, I've personally replaced quite a few components and for awhile she was running pretty bulletproof. Then I started having trouble with "warm starts". Car would start up fine but if I turned off the vehicle for a little while, such as filling up at the gas station, it wouldn't start for a good 30 minutes. I'd already recently replaced fuel pump, fuel filter, spark plugs, battery, ignition coils, etc etc so I was pretty sure it was the fuel injectors not spraying properly. They're original and unfortunately they don't make them anymore. A mechanic recommended me this product and I've used it on my last two tanks of fuel and the problem has cleared up. Worth every penny and way cheaper/easier than rebuilding the fuel injectors.

Could tell a difference right away using the royal purple injection cleaners! Would definitely purchase again if needed!

Use twice a year - to "clean out" the fuel lines and engine, cylinders, etc

Stoped my P0420 code