Pros

  • โ€ขKnown for providing outstanding protection against wear and tear, especially in farm tractors.
  • โ€ขVersatile synthetic blend suitable for both diesel and gasoline engines, including marine applications.
  • โ€ขUsers report quieter engine operation and better mileage compared to regular oils.
  • โ€ขHighly recommended by mechanics, indicating strong professional endorsement.
  • โ€ขConsistently reliable with no issues reported over lonerm use in multiple vehicle types.
  • โ€ขStrong reputation for reliability and performance across various applications, notably Kenworth trucks and F350 7.3 Powerstroke.
  • โ€ขEnjoys a lontanding reputation, with many users favoring it for decades.
  • โ€ขOffers good value for the price, especially for frequent oil changes.

Cons

  • โ€ขDifficult to find in larger containers, which is inconvenient for vehicles requiring multiple gallons.
  • โ€ขGeneral consensus that overall oil prices are considered high.
  • โ€ขNot easily available in all local areas, leading users to source it online.
  • โ€ขSemynthetic preference may lead some users to consider switching to a full synthetic.

Bottom Line

Delo 257004470 400 XLE SAE Synblend Synthetic Blend Oil 15W40 is a trusted choice for those needing a reliable and versatile engine oil. It is particularly valued for its excellent wear protection and enhanced engine performance for both diesel and gasoline engines. While it may be hard to find in larger quantities locally and comes with a somewhat higher price, its longstanding reputation leads to strong recommendations from both professionals and long-time users. Ideal for those who prioritize engine protection and mileage efficiency.

Lowest at any Popular Retailer
$15.48 at Amazon

Where to Buy

Prices last updated: July 30th 2025 12:09 am
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