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Review title: Might as well put in sugar instead
Product review: I added this Red Line to my 2004 Tahoe. After about 35 gallons my engine light came on.The errors were for multiple misfires so I replaced the spark plugs and flushed the plugs. Two weeks later my 7 month old catalytic converter lite up my engine light again with the code for low efficiency.I called the company and was never able to speak with anyone about the issues. Avoid this product and company at all costs. Because it will cost you!
