I used this on our 2016 GMC Tahoe with the L83 direct injection EcoTec3 engine. The truck had a little bit of a rough idle. I did this GDI cleaner, then replace the spark plugs AFTER the cleaner. This was the way to go since I figured that the cleaner would be hard on the plugs. I used the cleaner as directed on the label, changed plugs, then added two cans of Chevron fuel system cleaner. Truck doesn't skip a beat. I cannot confirm if gas mileage (mpg) increased, because we only drive about 20 miles a week with this vehicle right now.
Rating:
[5 of 5 Stars!]