1991 560SEL - engine ran rough, now purrs like a kitten!

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1991 560SEL - engine ran rough, now purrs like a kitten!

07-11-2025, 04:36 PM

qualified-merc qualified-merc is offline

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1991 560SEL - engine ran rough, now purrs like a kitten!

The engine was missing real bad. I found a gas station that sells 91 octane ETHYLENE FREE gasoline so I filled up two jerry cans with about ten gallons. I then put an entire bottle of Gum Out All in One System Cleaner into the tank. I then took the jerry cans and filled the tank with ten gallons of 91 octane ETHYLENE FREE gasoline.

the car starts right up and purrs like a kitten! Smooth as an electric motor......

https://gumout.com/fuel-system-cleaner/all-in-one-fuel-system-cleaner-ethanol-treatment/

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