Thread: CIS Fuel Conditioner Recommedation
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  #4  
Old 10-10-2018, 11:28 AM
hugo2648 hugo2648 is offline
Tampa420SEL
  
Join Date: Jan 2010
Posts: 5
I add "Star Tron Enzyme Fuel Treatment" in my 1990 420SEL. Dont know if it helps or not but I add 2 oz every tankful - religiously.
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