Driveability is a term used in the automotive service repair industry to describe a broad range of a vehicle’s engine performance characteristics. The most common driveability symptoms are the gradual loss of power over time (several years), a gradual decrease in fuel economy, an increase in oil consumption, engine knock or pinging, an increase in a vehicle’s engine operating temperature and lastly an increase in pollutants emitted into the atmosphere. Any one of these conditions on their own can and does lead to an increase in a vehicle’s daily operating cost and when several of the symptoms are exhibited simultaneously, severe and expensive engine damage can result.
Delivering the optimum performance from a vehicle’s engine has always been the focus of vehicle manufacturers when designing and building vehicles. Achieving and maintain this objective is difficult over a long period of time because the engineering and design process can only account but not control a variety of external factors. External elements or conditions such as the quality of the fuel available, the geographic location and varying climatic conditions the vehicle will operate in (daily, seasonally or annually) and the need to accommodate and meet differing regional, state, provincial or national government mandated emission and fuel economy standards makes it difficult for the vehicle manufacturers to deliver a vehicle that will continuously perform like new throughout its life span.
The automotive service repair market is aware of the driveability problem and has always and continues to offer a variety of specialized services to return a vehicle’s engine back to its original performance level. Most offer either a chemical cleaning service to de-carbonize the engine and/or remove contaminants from the air intake and fuel management system as separate independent professional services. The professional service deliver an improvement in a vehicle’s overall performance however neither service actually deals with the root cause of an engine’s power robbing contamination factor.
The professionals at Driveability have been intrigued with the gradual performance loss of a vehicle’s engine and have made it their mission to better understand the factors responsible for this condition and to offer a practical and affordable solution to return an engine to its “Like New” performance expectations. The study effort required a detailed review of vehicle manufacturers engine, fuel management and emission control system design changes during the past 50 years, the impact of geographic location and climatic conditions on performance and lastly the influence that government mandated emission and fuel economy regulations have on design and maintenance.