Automotive technology has evolved significantly since the mid-20th century, and so has motor oil. In the 1940s, cars lacked oil pumps and filters, relying on primitive methods to distribute oil. Despite frequent oil changes, engines often required overhauls by 80,000 miles due to dirty oil.

Modern motor oils are fortified with additives to suspend contaminants, making them easily trapped by filters. Here are some lesser-known facts about motor oil:

  • Antioxidants: Motor oils contain antioxidants that limit oxygen exposure, preventing rust and corrosion in critical engine parts.
  • Extended Change Intervals: Today’s improved oils can last 5,000-7,500 miles between changes, a significant increase from the previous 3,000-mile recommendation.
  • Synthetic Advancements: Synthetic oils can last even longer and outperform conventional oils, retaining lubricating properties and flowing better at lower temperatures. Developed during WWII, synthetics were a response to petroleum shortages and extreme weather conditions.
  • Bio-based Oils: Research is ongoing to develop motor oils from bio-based sources like canola and switchgrass, offering environmentally friendly alternatives.
  • Moisture Management: Regular oil changes are crucial for cars with short daily drives to prevent damage from moisture accumulation.
  • PCV Valve Preservation: Today’s motor oils are formulated to prevent contamination and clogging of the PCV valve, an essential emissions control device.
  • Non-flammability: Motor oil undergoes fractional distillation during refining, raising its ignition temperature and reducing the risk of combustion.


Regular oil changes remain essential despite technological advancements. They ensure longevity and performance, maximizing the mileage of your vehicle. If you’re due for an oil change or unsure of your last one, visit any of our three Jim Grizzle Tire locations in Arkansas, and we’ll take care of it for you. Remember, maintaining a regular oil change schedule is the simplest way to protect your vehicle’s engine.