As a commercial go-kart track operator, I am fortunate that I was introduced to Opti-4 and began using it in my 11 Honda engines. Each engine is put through a vigorous daily cycle, including extensive idling in the pits and hard operation on long, hot summer days. Even after accruing several thousand running hours on each, some in excess of 7,000 hours, these engines have performed virtually flawlessly in the many years that I have been using Opti-4. The 55-gallon drum of Opti-4 that sits in my shop is a sound investment in longevity, quality, and peace of mind.
