Mark’s Knock Engine Service

The Official Mark's Knock Engine Service Website

Great people to do business with, for all of your engine rebuilding needs within the United States.

Visit the MK Engine Service website

Trading Post

The Official CFR Trading Post Website

One stop online sales, shop for history and engine sales, for everyone in the octane engine business, Worldwide.

Visit the Trading Post website

ESD Systems

The Official ESD Systems Website

ESD is well-known for supplying On-Line and Laboratory Analyzers throughout the world.

ESD systems 

StanCo Scientific

The Official StanCo Scientific Website

We strive to expand our catalog of new and refurbished instruments. Take a look and see what’s new!

Visit the StanCo Scientific website


EngineBuzz another sister site to was created to disseminate information about octane engines. Until now, information about these engines had limited distribution. Users were required to attend trade shows, U.S. regional group meetings, and other technical committees. The objective of EngineBuzz is to create a central location for users to learn about current, historical, and upcoming information from the octane testing industry.

Visit Engine Buzz website

Vertex Electronics

Vertex Electronics has a new pickup testing system developed to assist technicians and managers to quickly diagnose, characterize output and quantify pickup attributes. This new tester will put more dollars on the bottom line through quicker and more accurate diagnostics testing and by generating data to help better fit pickups to the fuel testing process. The three attribute groups are Magnetic, Mechanical and Electrical are tested.

Visit Vertex Electronics