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DI motors have issues with fuel dilution and intake valve deposits that are not an issue with port injection. I always assumed the Dexos 1/2 addative packages were to address these issues. I could certainly be wrong though. As for non dexos oils having an adverse effect on catalytic converters, I'm not buying this as every car manufactured in the last 40 or so years had cats.
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Baby Blue
2016 Hyper Blue 2SS/6m/MRC/NPP/Silver Rally stripes/ZL1 wheels & brakes/GForce DS and axles/ZLE Cradle Bushings/FE4 ARB front & rear/SEMA Grill/Rotofab dry/95mm TB/Magnuson 2300/Full LT4 fuel system/JMS boost-a-pump/E85 Sensor/Ported CID heads from LME/Cammotion PD cam/Thompson Motorsports forged shortblock/catted Kooks 1 7/8 headers /JRE remote tuned
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