high PH cleaner safe?
 

Meguiars All purpose cleaning wipes: PH 12.5
Meguiars Extra: PH 12.4 at 70 degrees F

Meguiars Heavy Duty Carpet & Interior Cleaner: PH 12.0 at 70 degrees F

According to Meguiars, Meguiars Extra is guaranteed to be safe for engine room cleaning: does not cause corrosion on engine components, does not dry out rubber or paint. So I used it for engine cleaning. I also used it for wheel cleaning.

I used Meguiars Heavy Duty Carpet & Interior Cleaner on vinyl interior (including MB-Tex) cleaning.
There were some stains that did not disappear by wiping with protectant. So I used Meguiars Heavy Duty Carpet for cleaning. It had better cleaning power than protectant I used. I hope the carpet cleaner did not damage dash, MB-Tex, door handle, etc.