Q: Is this shampoo pH neutral? 
A:  Yes

Q: Can I use this product through a pressure washer?
A:  This shampoo has not been developed or tested for use through a pressure washer. Its viscosity may not be compatible with many pressure washers. We would recommend Autoglym Polar Series for use through a pressure washer. 

Q: What is the benefit of the additional foam?
A: Ultra High Definition Shampoo produces an abundance of soft, dense foam. The foam lasts for longer in the bucket and on the car. The foam coverage not only indicates where you have washed (reducing the likelihood of areas being missed), but the excellent cling time also reassures you that the shampoo is loosening and removing dirt and traffic film.