Does mobil 1 Advanced clean as good as it did years ago?

[OVERKILL]

What is HPL? What oil is that?

@High Performance Lubricants is a site sponsor.
Here are their products:

Automotive Lubricants

Advanced Lubrication, Inc.

www.advlubrication.com

 

[ChrisD46]

What is HPL? What oil is that?

*High Performance Lubricants - a participant here on BITOG .