Essential Vehicle Oil Types and Maintenance

Regularly checking and maintaining the oil in your vehicle is crucial for ensuring its optimal performance and longevity. Oil serves as a lubricant, protecting the engine’s moving parts and reducing friction, heat, and wear. Let’s explore the different types of oil used in vehicles and provide guidelines for how often you should check and maintain them.


Engine Oil:

Engine oil is the most common type of oil used in vehicles, and it plays a vital role in maintaining the engine’s health. It lubricates the engine’s components, reduces friction, and helps dissipate heat. It also cleanses the engine by carrying away dirt and deposits. Engine oils are available in various viscosity grades, such as 5W-30 or 10W-40, which indicate their thickness at different temperatures.


  • Check engine oil levels regularly by using the dipstick. The frequency depends on your vehicle, but it is generally recommended to check every month or at least every 3,000 miles.
  • Change the engine oil and oil filter as per the manufacturer’s recommendations, typically every 5,000 to 7,500 miles or every six months, whichever comes first.
  • Ensure the oil used meets the specifications outlined by the vehicle manufacturer.



Transmission Fluid:

Transmission fluid is essential for automatic transmissions as it lubricates the gears, provides hydraulic pressure, and cools the transmission. It also facilitates smooth shifting and protects against wear and tear. Manual transmissions may require gear oil instead.


  • Check the transmission fluid regularly according to your vehicle’s owner’s manual. The frequency can vary, but it is typically recommended every 30,000 to 60,000 miles or every two years.
  • If the fluid appears discolored or has a burnt smell, it may be an indication of a problem, and you should consult a mechanic.
  • Follow the manufacturer’s guidelines for changing the transmission fluid, which is typically around every 60,000 to 100,000 miles.



Differential Fluid:

Differential fluid is found in vehicles equipped with a differential, which is responsible for distributing power between the wheels. It lubricates the gears and bearings within the differential, preventing excessive wear and ensuring smooth operation.


  • Check the differential fluid level periodically, following your vehicle’s maintenance schedule.
  • Replace the differential fluid as recommended by the manufacturer, which is generally between 30,000 and 50,000 miles, depending on driving conditions.



Power Steering Fluid:

Power steering fluid allows for smooth and easy steering by reducing friction in the power steering system. It also provides lubrication to the pump and other components.


  • Check the power steering fluid level regularly, especially before long trips.
  • If you notice difficulty in steering or hear unusual noises, have the power steering system inspected, as it may require a fluid change or repair.



Regularly checking and maintaining the various types of oil in your vehicle is essential for its smooth operation, performance, and longevity. By following the recommended maintenance guidelines for engine oil, transmission fluid, differential fluid, and power steering fluid, you can ensure that your vehicle’s vital components are adequately protected, reducing the risk of premature wear and costly repairs. Consult your vehicle’s owner’s manual and consider seeking professional assistance when in doubt. Remember, proper oil maintenance leads to a healthier and more reliable vehicle.



Whether it’s engine oil, transmission fluid, differential fluid, or power steering fluid, Diehl Automotive has the knowledge and resources to ensure that your vehicle’s vital fluids are properly checked, maintained, and replaced as needed. With their exceptional service and attention to detail, Diehl Automotive provides peace of mind, knowing that your vehicle is in capable hands. Don’t compromise on the health of your vehicle—visit Diehl Automotive for top-notch fluid services and keep your car running smoothly for miles to come.


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June 26, 2023
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