In a recent video, Babu discussed one of the most durable engines he has encountered in his career: the Toyota 2ZR-FXE unit used in the Prius. The car in question was a 2010 Prius that had covered 140,000 km without a single engine oil change. Unsurprisingly, the engine was in extremely poor visual condition. "There was sludge, there was grime, it was absolutely awful," Dan Babu recounted. Despite this, the buyer decided to purchase the vehicle, ignoring the obvious risks and the initial recommendation to walk away from the deal. Why is Toyota’s gasoline engine so durable? After the purchase, the proposed solution was a double engine flush to remove deposits. The outcome was entirely unexpected. Not only did the engine continue to run, but it operated flawlessly, without consuming oil or experiencing any major issues. This led Dan Babu to rank the 2ZR-FXE among the most durable engines in the industry. "They’re not just good. They’re exceptionally good and can handle really, really tough conditions," Babu stated. The 2ZR-FXE engine is part of Toyota’s hybrid powertrain system across various models and is designed to operate under significantly milder conditions compared to conventional engines. It functions on the Atkinson cycle, which reduces mechanical stress and extends its lifespan. Additionally, in the hybrid system, the internal combustion engine does not run continuously, as the electric motor shares part of the load. This results in less wear and tear, even under harsh operating conditions. What does this mean for used car buyers? This story raises an important question: How critical is service history for certain engines? The example mentioned is extreme and should not be taken as the norm, but it clearly demonstrates that some engines can withstand extremely rough handling and neglect of regular maintenance. Experts, however, continue to emphasize the importance of regular maintenance. Such cases are rare exceptions, not the rule. Even the most robust engine can fail if neglected over the long term.