I been a Master AutoTruck Tech for 40…
I been a Master AutoTruck Tech for 40 plus years in Dealerships. I have seen lots of scams and snake oils. I have a 2018 Kia OptimaS GDI. The tailpipe always get caked with thick black soot and oil thinned from gas it ran way too rich fuel curves but OEM advise they are correct. I bought a Stage 1 chip and after running it i just had too advise this really helped before mileage in town was Avg 22mpg on Hwy 32 mpg on good Day. Now in town Ave 38mpg and Hwy 43 mpg. The tailpipe is clean no soot idles smooth and dead spot on Acell from stops gone great power curve now. Oil now has less raw fuel that has always been concerns with GDI engines. I had a engine knock from over fueled and high compression and timing on Acell now its gone. Cant believe i found a chip that really helped. I also found the CRC valve and Turbo cleaner really cleans intake valves .
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