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Autumn Brings Cool Weather, Ideal Time for Car Maintenance｜AISO Lubricants Seasonal Maintenance Guide
Release time:
2026-08-12
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Autumn Brings Cool Weather, Ideal Time for Car Maintenance｜AISO Lubricants Seasonal Maintenance Guide
Cool breezes arrive with the Start of Autumn. As we bid farewell to the intense summer heat, the temperature difference between day and night gradually widens, marking a critical seasonal maintenance window for vehicles. After enduring high-temperature exposure and frequent start-stop operations throughout summer, cars harbor hidden hazards in various fluids, rubber components, batteries and tires. Thermal expansion and contraction caused by falling temperatures may cause minor issues accumulated over summer to surface intensively. AISO Lubricants reminds all car owners: just as you add clothes to stay warm in cool autumn weather, your vehicle also needs timely seasonal maintenance. Adopt preventive maintenance over repairs to ensure smooth travel in autumn and winter.
I. Engine Lubrication: Proper Motor Oil Is Core Amid Variable Temperature Differences
✅ Maintenance Recommendations
1. Check oil level and condition with the dipstick: Park the vehicle on flat ground, turn off the engine and let it stand for 5-10 minutes. Pull out the oil dipstick, wipe it clean with a dry paper towel, reinsert and pull it out again to verify that the oil level falls between the upper and lower scale marks. Inspect the oil condition simultaneously. If the oil is dark and turbid with visible impurities or a burnt smell, replace the motor oil and oil filter promptly even if the scheduled replacement mileage is not reached, to avoid continuous engine damage from deteriorated oil.
2. Select suitable oil based on regional climate: China features a vast territory with distinct temperature differences between northern and southern regions in autumn. Oil selection must adapt to local conditions. Northern areas see significant cooling and low night temperatures in autumn, so 0W‑30 and 5W‑30 motor oils with excellent low-temperature fluidity are preferred. These oils flow rapidly in low temperatures to ensure timely lubrication of all engine components during cold starts. In southern areas, days remain warm while nights turn cool in autumn, making 5W‑30 and 5W‑40 oils ideal choices. They balance high-temperature oxidation resistance and low-temperature fluidity, maintain stable oil film performance across wide temperature ranges, and deliver sustained engine protection.
3. Choose high-quality fully synthetic AISO motor oil: Tailored for seasonal maintenance needs, AISO’s premium fully synthetic motor oil features an outstanding viscosity index that resists performance fluctuations from drastic day-night temperature differences. Its exclusive formula effectively inhibits high-temperature oxidation and reduces oil sludge and carbon deposit formation, while maintaining excellent fluidity in low temperatures for rapid coverage of all friction parts during cold starts. Additionally, it powerfully cleans and disperses internal engine deposits and sludge, forms a tough and stable protective oil film, reduces cold-start wear, protects core engine components for long-term service, extends mechanical lifespan, and keeps vehicles in optimal operating condition throughout the seasonal transition.
II. Cooling System: Prioritize Anti-freezing Protection Beyond Anti-boiling
Many car owners hold a misconception that coolant only works in winter. In fact, it serves as an essential core protectant for the cooling system all year round. Post the Start of Autumn, temperatures gradually decline, approaching the cold winter, making this the perfect time for cooling system maintenance to eliminate potential winter low-temperature risks. After high-intensity heat dissipation throughout summer, coolant suffers long-term high-temperature circulation, resulting in fluid loss, deterioration and reduced freezing point. Scale and corrosion deposits may also accumulate inside the cooling system and reduce heat dissipation efficiency. Coolant with substandard freezing points will freeze easily when temperatures drop sharply. The volume expansion caused by freezing may crack the water tank, water pipes, water pump and other components, leading to high maintenance costs and even engine overheating damage. Hence, autumn cooling system maintenance is therefore essential.
✅ Maintenance Recommendations
1. Check the liquid level of the auxiliary water tank: Regularly open the engine hood and check if the coolant level in the auxiliary water tank falls between the MAX (maximum) and MIN (minimum) scales. Top up with specified coolant in case of low level. Never add tap water directly, as impurities in tap water will form scale to block pipelines and corrode water tanks and water pumps, shortening the cooling system’s service life. Always top up coolant when the engine is cold to avoid scalding from high-temperature coolant spray.
2. Test coolant freezing point and system status: Use a professional freezing point tester to ensure the coolant’s freezing point is 5-10℃ lower than the local minimum winter temperature to prevent freezing. Replace the coolant immediately if the freezing point is substandard or the fluid appears turbid or discolored. Meanwhile, thoroughly inspect cooling system water pipes and water tanks for leakage, aging and cracking, and verify the normal operation of water pumps and thermostats. Repair or replace aging pipelines and leaking interfaces in a timely manner to ensure stable cooling system operation during the seasonal transition.
III. Braking System: The First Line of Defense for Travel Safety
Autumn brings frequent rainy weather and slippery road surfaces, making the reliability of the braking system crucial to driving safety. High summer temperatures accelerate water absorption and deterioration of brake fluid. Excessive water content reduces the boiling point of brake fluid, easily causing vapor lock during braking, which leads to soft brakes, extended braking distances and increased brake pedal travel — posing severe safety hazards. Moreover, brake pads and brake discs suffer aggravated wear from frequent summer braking. Neglecting timely inspections may cause abnormal braking noise and jitter, compromising braking performance. Therefore, a comprehensive inspection and maintenance of the braking system is essential after the Start of Autumn.
✅ Maintenance Recommendations
1. Inspect brake fluid level and condition: Open the engine hood and check if the brake fluid level in the reservoir is within the normal range. Observe the fluid color and transparency. Replace the brake fluid promptly if it is turbid, black or contains water sediment, indicating water absorption and deterioration. Select brake fluid that meets the vehicle manufacturer’s specifications during replacement, and bleed air from the braking system thoroughly after replacement to ensure sensitive braking response and normal pedal travel.
2. Check wear of brake pads and brake discs: Regularly measure brake pad thickness. Replace the pads immediately when the remaining thickness is less than 3mm or reaches the limit scale, to avoid degraded braking performance and brake disc damage caused by excessive wear. Inspect brake discs for wear grooves, deformation and cracks. Uneven wear or grooves will cause vehicle jitter and abnormal noise during braking; polish or replace the brake discs as needed to ensure optimal braking performance and safe driving on slippery autumn roads.
IV. Tires and Tire Pressure: Adjust Pressure Timely as Temperatures Drop
Falling temperatures cause air contraction inside tires and reduced tire pressure — a commonly overlooked detail in autumn car maintenance. Insufficient tire pressure increases the tire’s ground contact area, accelerating tire wear and raising fuel consumption, while compromising vehicle handling stability. On slippery autumn roads, this greatly increases the risk of skidding and side slip, leading to higher traffic accident rates. In addition, high summer temperatures accelerate tire rubber aging, and low autumn temperatures reduce rubber flexibility. Unaddressed tire hidden dangers may result in bulges and damage. Thus, tire and pressure maintenance is a key priority in autumn.
✅ Maintenance Recommendations
1. Regularly inspect and adjust tire pressure: Check tire pressure weekly with a professional pressure gauge and adjust it to the standard value specified for the vehicle (usually labeled on the fuel tank cap inner side, door pillar or vehicle manual). Excessively high pressure reduces tire ground contact area and grip, increasing blowout risks; excessively low pressure aggravates wear, raises fuel consumption and impairs handling. Always adjust pressure when tires are cold to ensure accurate detection results.
2. Inspect tire condition and remove foreign debris: Thoroughly check tires for bulges, damage, cracks and nail punctures, focusing on vulnerable sidewalls and tread edges. Clear stones, sediment and other debris from tire treads regularly, as embedded debris impairs drainage and grip performance and causes abnormal tire wear. Replace tires promptly if the tread depth is less than 1.6mm or rubber aging is obvious, to ensure safe autumn travel.
V. Air Conditioning & Ventilation: Seasonal Cleaning for In-car Health
High-load summer air conditioning operation leads to massive accumulation of dust, pollen, bacteria and other impurities on condensers, air conditioning filters and evaporators. Although air conditioning usage decreases as autumn cools down, seasonal cleaning cannot be overlooked. Unclean air conditioning systems breed bacteria and mold, producing unpleasant odors that deteriorate in-car air quality and may cause respiratory discomfort and allergies for passengers. Meanwhile, inspecting the heating system in advance ensures normal operation in low autumn temperatures and improves riding comfort.
✅ Maintenance Recommendations
1. Replace the air conditioning filter: As the core component for in-car air filtration, the air conditioning filter accumulates large amounts of dust, pollen and bacteria after summer use. Replace it promptly after the Start of Autumn. Select high-quality filters compatible with the vehicle model to ensure effective filtration of impurities and odors and fresh in-car air. The general replacement cycle is 3-6 months, adjustable according to vehicle usage environment and frequency.
2. Clean the air conditioning system and inspect heating function: Thoroughly clean evaporators and pipelines with professional air conditioning cleaners to remove breeding bacteria, mold and odors. Inspect heating pipelines, fans and heater cores for blockages and damage to ensure stable heating performance in low autumn weather. Regularly turn on the external circulation mode to maintain air ventilation and reduce bacterial growth inside the vehicle.
VI. Battery & Electrical System: Eliminate Hidden Hazards to Avoid Breakdowns
Widening day-night temperature differences significantly affect vehicle battery performance. High summer temperatures cause battery electrolyte evaporation and reduced battery capacity. Falling autumn temperatures further lower battery activity and accelerate capacity attenuation, leading to increased risks of weak startup or failure to start vehicles in cold mornings. In addition, seasonal temperature changes expose problems such as aging electrical lines, poor contact and battery terminal oxidation, which may cause sudden vehicle breakdowns if left unaddressed. Thus, comprehensive inspection of the battery and electrical system is essential in autumn.
✅ Maintenance Recommendations
1. Check battery liquid level and terminal condition: Verify the battery liquid level regularly and top up with distilled water if it falls below the minimum scale. Clean oxides on battery terminals with professional tools or hot water, then apply a layer of petroleum jelly or dedicated protective agent to prevent re-oxidation and ensure stable connection. Disconnect the negative terminal before operation to avoid short circuits.
2. Test battery voltage and electrical lines: Use a professional battery tester to measure voltage. Replace the battery promptly if the voltage is below the standard value (approximately 12V), indicating severe capacity attenuation and preventing cold-weather breakdowns. Inspect electrical lines for aging, damage and looseness, focusing on startup and lighting circuits. Repair or replace faulty lines in a timely manner to ensure stable operation of the electrical system and reliable vehicle startup.
VII. Paint & Interior: Seasonal Maintenance to Extend Vehicle Service Life
Intense ultraviolet rays and rain erosion in summer cause varying degrees of damage to vehicle paint, leading to aging, fading, loss of luster, fine scratches and oxidation layers. Frequent thermal expansion and contraction of paint under large day-night temperature differences in autumn further aggravate aging. Unmaintained paint will eventually crack and rust, damaging the vehicle’s appearance and reducing its service life. Meanwhile, the high-temperature and humid summer environment breeds bacteria and odors in the interior. Seasonal interior cleaning and maintenance creates a healthy, comfortable riding environment and extends interior lifespan.
✅ Maintenance Recommendations
1. Vehicle paint cleaning and maintenance: Thoroughly clean the vehicle paint after the Start of Autumn to remove summer accumulated dust, insect residue and bird droppings that corrode paint over time. Apply waxing, crystal coating or glaze sealing after cleaning to form a protective layer, repair summer paint damage, and enhance the paint’s resistance to corrosion, aging and ultraviolet rays for a long-lasting glossy finish. Avoid washing the vehicle in high temperatures or direct sunlight to prevent paint damage from drastic temperature differences.
2. Interior cleaning and sterilization: Fully clean dead corners including seats, floor mats, storage compartments and center consoles with dedicated interior cleaners to remove stains and dust. Apply professional leather conditioner to leather seats to prevent aging and cracking. Conduct ozone sterilization after cleaning to eliminate bacteria, mold and odors inside the vehicle. Regular window ventilation also effectively reduces bacterial growth and maintains a fresh in-car environment.
VIII. Core Summary of Start-of-Autumn Car Maintenance: Preventive Maintenance for Long-term Protection
The core of autumn cooling maintenance is "prevention before failure". Focus on key components including vehicle fluids, braking system, tires, battery, air conditioning and paint, and combine detailed inspections with professional product selection to help vehicles smoothly pass the seasonal transition. All vehicle components suffer varying degrees of loss after high-intensity summer operation. Timely autumn maintenance repairs residual summer damage and fully prepares vehicles for harsh autumn and winter weather, avoiding minor hidden dangers evolving into major faults and cutting long-term vehicle maintenance expenses.
AISO Lubricants reminds all car owners to avoid blind seasonal maintenance and focus on four core steps:inspection, replacement, cleaning and adjustment. Timely check fluid status and component wear, replace consumables such as motor oil and air conditioning filters as needed, clean air conditioning systems and interiors, and adjust key parameters including tire pressure. Meanwhile, high-quality maintenance products are the guarantee of maintenance effects. AISO’s full range of maintenance products delivers all-round protection for core components such as engines and cooling systems with professional formulas and stable performance, enabling car owners to finish seasonal maintenance with ease.
Car maintenance is akin to body care — details determine the final effect. Autumn car maintenance protects vehicle performance and safeguards travel safety. We encourage all car owners to attach importance to seasonal maintenance, develop regular inspection and scientific maintenance habits, keep vehicles in optimal operating condition, and accompany every safe journey. AISO Lubricants will continue to focus on car owners’ needs, provide professional and comprehensive maintenance guidance and product support, and work with all users to preserve vehicle condition and deliver worry-free travel experiences.
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