I performed a groove on a 2003 supercharged Grand Prix.

This car's exhaust temps wer very high before groove.

Watch this as a miracle happens with the groove.

Exhaust manifold before 440 degrees, after 313 degrees!!!!!!!

EGR 284 degrees before, after 195 degrees!!!!!!!

Catalytic converter 334 degrees before, after 250 degrees!!!!!

Tailpipe 185 degrees before, after 119 degrees!!!!!!!!

Water temp 223 before, after 201!!!!!!!!!

The groove has calmed another slow MELTDOWN!!!!!!!!!!

Do you think his oil in the engine will last a little longer and he won't have an early retirement for this vehicle??????

That is true, Aron.

You might recommend he obtain some Cerma before the wear becomes too sever to correct with the treatment. It will also further enhance the MPG's!

Keep it up, big guy!

Ron