Pros

  • โ€ขHighly effective for old, worn gas engines, reducing oil consumption significantly.
  • โ€ขDiesel oil with more detergents provides better cleaning of engine internals and piston rings.
  • โ€ขUsers noticed reduced oil consumption from 1 quart every 750 miles to 1.5 quarts every 2000 miles.
  • โ€ขImproved engine performance with no smoking or burning oil smell.
  • โ€ขSatisfied users report noticeable fuel mileage improvements over previous oil.
  • โ€ขPerforms better on startup, enhancing engine sound at idle.
  • โ€ขMeets Ford's latest specifications for 6.iter engines, making it suitable for specific models.
  • โ€ขLarge container size offers convenience for usage.
  • โ€ขImprovement in engine smoothness and operation in high temperatures.

Cons

    Bottom Line

    Shell Rotella T6 Full Synthetic Heavy Duty Engine Oil 5W-40 seems like the MVP for anyone needing reliability and performance from their engines, especially in diesel vehicles. It enhances fuel mileage, reduces oil consumption, and keeps your engine purring like a kitten. Whether your engine is old or new, this oil's cleaning properties and engine protection could be a great choice for maintaining optimal performance.

    Lowest at any Popular Retailer
    $99.99 at amazon

    Where to Buy

    Prices last updated: July 30th 2025 6:50 pm
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