Veteran Mechanic Claims Disabling Auto Start/Stop Could Double Engine Life

A seasoned automotive expert with over five decades of professional experience is urging drivers to reconsider one of the most common features found in modern vehicles. Scotty Kilmer, a mechanic who has garnered a massive following online, claims that the widely utilized auto start/stop technology—designed to improve fuel efficiency—may be causing long-term damage to vehicle engines.

While automakers increasingly implement the technology to meet emissions targets and boost fuel economy, Kilmer argues that the mechanical strain of constant ignition is a trade-off many owners should avoid. According to his analysis, the wear and tear caused by frequent restarts far outweighs the benefits provided by brief periods of engine idling.

The auto start/stop feature can typically be deactivated via a dashboard button, often marked with an ‘A’ inside a circular arrow.

Kilmer’s assessment centers on the mechanics of ignition and battery health. He contends that excessive reliance on the feature places undue stress on critical vehicle components.

“Start/stop technology is the dumbest thing that’s come out in years. 97% of the wear happens when you start the car so do you want to keep starting and stopping it? Not if you want your car to last longer.”

— Scotty Kilmer, Mechanic

Beyond the engine block itself, Kilmer highlights concerns regarding auxiliary power systems. He notes that many vehicles equipped with this technology continue to use lead-acid batteries that are not optimized for the high frequency of cycling required by modern start/stop systems. Given these constraints, he advises that disabling the feature is a simple, proactive step toward mitigating unnecessary mechanical fatigue.

The advice has resonated with a significant portion of the driving public, with many vocalizing their own frustrations regarding the intrusive nature of the technology. Comments from the motoring community highlight a consensus that the intermittent shutdown at red lights and stop signs can be distracting and potentially detrimental to the vehicle’s long-term health. Kilmer suggests that by turning off the function, drivers can potentially double the operational life of their car’s engine.

While the feature has become a standard inclusion in most new vehicle lineups, consumers appear increasingly skeptical. Reports from prospective car buyers indicate that some are flat-out canceling orders for new models that do not offer a permanent way to disable the start/stop mechanism. Despite the manufacturer drive toward automated fuel-saving measures, the message from veteran mechanics remains clear: manual control over ignition may remain the gold standard for vehicle longevity.

For owners looking to adjust their vehicle settings, the process is usually straightforward. Once deactivated, most modern dashboards will display a small indicator light, signaling that the system is no longer engaged in the automated stop/start cycle.