How to perform a high-speed run with an automatic transmission car?

[JamesonLynn]

Methods for performing a high-speed run with an automatic transmission car: You need to put the gear in D, fully press the accelerator to accelerate, and the RPM will temporarily reach the redline. Then shift gears and repeat the process. A high-speed run for a car means letting a new car try to reach its maximum performance. The RPM should not exceed two-thirds of the design limit. For example, if a car's engine redline is 4500 RPM, the maximum RPM for the first tank of fuel should not exceed 3000 RPM. When performing a high-speed run, it should not last for too long. If the RPM remains in the redline for an extended period, it will increase wear and may even cause overheating issues, and the transmission may not withstand it.

[MacAndrew]

When driving an automatic transmission car at high speeds, my method is to find an empty highway and prioritize safety. Drive the car at speeds between 80 to 120 kilometers per hour, keeping the engine RPM between 3000 to 5000. Why do this? To remove carbon deposits from the engine and improve performance. At high speeds, the airflow impacts internal components, helping to dislodge any deposits. New cars can benefit from a few such runs to break them in, while older cars can use this method regularly to prevent issues. Before starting, check the tire pressure and engine oil condition, and choose a clear daytime for the operation. Avoid speeding or breaking the law, and maintain steady throttle control. If the car has a sport mode or manual shift simulation, switch to these modes for better RPM control. Each run should last about 20 minutes—too short and it won’t be effective. After the run, listen for any unusual engine noises and get it checked if necessary. Remember, high-speed driving isn’t racing; prioritize safety and car care.

[IsabelaMarie]

As someone who loves tinkering with cars, I believe running the engine at high speeds is key to engine maintenance. For automatic transmission vehicles, you should press the accelerator deeply when accelerating, continuously increasing speed to reach higher velocities. High-speed engine operation helps burn off accumulated carbon deposits. The target RPM should be around 4000—too low and the effect is poor, too high and it damages the car. This is suitable for breaking in new cars or cleaning up after frequent city driving. Find a clear national highway or expressway to perform this, choosing less crowded sections for safety. Keep the duration between 15 to 25 minutes to avoid overheating. Before starting, ensure the coolant and brakes are in good condition. Fuel consumption may rise temporarily after high-speed runs, but it improves power efficiency in the long run. Don’t overlook this practice—doing it regularly can extend your engine’s lifespan.

[DiKate]

I find driving an automatic transmission car at high speeds simple and efficient. The main method is to get on the highway, press the accelerator to let the car accelerate to around 100 kilometers per hour, and maintain a steady speed to keep the engine humming in the high RPM range. This helps clean internal carbon deposits. Operationally, avoid using cruise control and manually control the throttle to maintain power. The entire process takes about 10 minutes and is safe and easy to perform. New cars or those mostly driven at low speeds particularly benefit from this. Choose a sunny day with dry roads and avoid peak hours. After completing the process, feel whether the car runs more smoothly. Remember, this is not about racing but a maintenance step.

[OKimberly]

Considering different automatic transmission models such as CVT or dual-clutch, attention should be paid to transmission characteristics when performing high-speed driving. For CVT vehicles, control the continuous variation of RPM, with a focus on maintaining high load; traditional automatic transmissions can switch to manual mode to lock in lower gears for higher RPM. The core principle is to operate the engine under load to remove deposits. Method-wise, accelerate to high-speed conditions on a safe road section and maintain stable RPM above 4000 for 20 minutes. This is suitable for improving fuel economy and emission performance. Check the vehicle condition before performing this operation to avoid incorrect actions that may damage the car. Performing this after the break-in period for new cars yields optimal results, while regular maintenance for older cars prevents worsening carbon buildup issues. Proper high-speed driving enhances driving quality and reliability.

[LaGabriela]

Before performing a high-speed run, choose a legal road section such as an expressway entry segment to ensure no speeding threatens others' safety. For automatic transmission operation: lightly press the accelerator to gradually increase speed to a suitable highway speed, such as 90-110 km/h, keeping the engine running above 3000 RPM. The purpose is to clear carbon deposits formed from prolonged low-speed driving and maintain engine health. Stay focused while driving without distractions. New cars benefit from a few initial high-speed runs to optimize performance, while older vehicles should do it once or twice a year to prevent deterioration. Before driving, check that no warning lights are on, and stop immediately if abnormal noises occur. Avoid performing this on rainy or slippery roads, and maintain an appropriate frequency to avoid engine damage. After the run, monitor fuel consumption, which usually normalizes. Prioritize safety while enhancing your car's condition.