Howes Diesel Defender

For over a century, Howes Products has been making the highest quality performance additives and lubricants for moving parts and vehicles. As a fifth-generation, family owned and operated company, we at Howes take pride in developing the industry's safest, most effective, and reliable products available. With passion and commitment, we strive to provide the utmost in customer service, and make it a top priority to earn and retain the trust of our patrons and partners alike. With an ever-growing line of superior preventive maintenance products, backed by North America's number one selling diesel additive, Howes is dedicated to upholding our reputation of being Tested. Trusted. Guaranteed.