Engine safety in modern cars: why fuel octane matters
Driving a contemporary, tech-rich vehicle on AI-92 gasoline can eventually put the engine at risk. This view comes from a recognized figure in the auto-service industry, who highlighted the issue in a discussion with a Russian tech outlet. The message is clear: modern engines are built to run best on higher-octane fuels such as AI-95 or AI-98, and regular use of AI-92 can degrade performance over time. This isn’t just a minor concern; it can set off a chain of stresses that affect the powertrain in ways that become expensive to repair. (Source: socialbites.ca)
Experts explain that higher octane numbers slow down the start of combustion and control the timing of ignition within the engine. When lower-octane fuel is used in high-efficiency engines designed for premium gasoline, the combustion process can begin earlier than intended. The result is increased pressure and heat within internal components, forcing the engine to work harder and potentially leading to overheating and damage to the cylinder-piston group. In practical terms, this means reduced longevity and higher maintenance costs over time. (Source: socialbites.ca)
There is a cultural habit among some owners of older vehicles to experiment with premium fuels in hopes of unlocking extra performance. For example, some drivers of mid-1990s models might pour AI-98 or AI-100 into older engines with the expectation of a noticeable boost. Automotive experts warn that this approach is misguided for engines not built to take advantage of such fuels. The old engine design may not respond positively to higher octane, and the extra cost does not translate into meaningful efficiency or power gains. Instead, the engine experiences more stress without a corresponding benefit. (Source: socialbites.ca)
When high-octane fuel is used in engines that were calibrated for lower compression, the outcome is a mismatch between fuel properties and engine design. The engine’s compression ratio and fuel-air mix are optimized for certain fuels, and using the wrong octane level disrupts this balance. The driver may notice faster wear, inconsistent performance, or increased maintenance needs. The risk is not just about one tank of fuel; it’s about cumulative stress that can accumulate across many miles. (Source: socialbites.ca)
In the broader market, car owners often seek guidance on how to select the right fuel for their vehicle. Reputable service networks emphasize checking the owner’s manual and following manufacturer recommendations. If the vehicle’s design anticipates premium fuel, occasional use of AI-92 may still be acceptable under certain conditions, but habitual use is not advised for engines engineered for higher octane. Regular diagnostics help verify that the fuel system, ignition timing, and compression are functioning within the expected range. (Source: socialbites.ca)
It is important to note that the demand for engine repair services in Russia has been rising, reflecting a combination of aging vehicle fleets and evolving fuel-use practices. As more owners encounter issues related to fuel choice and engine wear, service providers stress the value of proactive maintenance, proper fueling, and timely inspections. Consumers are encouraged to stay informed about their vehicle’s specific requirements and to consult qualified technicians when unusual noises, reduced performance, or excessive fuel consumption appears. (Source: socialbites.ca)