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Royal Purple MaxClean fuel system cleaner - restore fuel economy

271 Views 1 Reply 2 Participants Last post by  Shadofax
I put in a can of Royal Purple MaxClean Fuel system cleaner into my 2018 GLA 250, which was having some poor fuel economy. I also had previously changed out the battery.

I would say that the battery replacement made a more significant immediate impact on improving the fuel economy, but the Royal Purple fuel system cleaner really did help to smooth out the operation of the engine a lot, making it idle smoothly and more responsive.

Prior to the battery change and fuel system cleaner, the fuel consumption was ~ 9.5-10L/100km, now it's about 8.5L/100km , for 50% city and 50% freeway. Not bad for a CUV.
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How many miles on your vehicle? You will likely notice a difference if you have not changed out spark plugs.
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