Blue Diamond

Ultimate Engine Oil - 5w40

5 out of 5 based on 2 customer ratings
(2 customer reviews)

USD 52.36USD 243.47

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100% PAO Pure Synthetic 5w40 Motor Oil

Blue Diamond Ultimate Engine Oil is 100% PAO pure synthetic motor oil – superior to partial synthetics, meeting every spec from a passenger car to a semi truck and everything in between.

Recommended for most gas and diesel engines.
Now available in CJ-4/SN OR CI-4 Plus/SL, CK-4 coming soon!

For diesels 2007 and older, use CI-4 Plus.
For diesels newer than 2007, select CJ-4.

SKU: Blue Diamond Oil

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5 out of 5 stars

2 reviews

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What others are saying

  1. David K. from Mooringsport, LA

    5 out of 5

    (verified owner)

    I want to tell you that I have been running the Blue Diamond in my Yanmar tractor. This YM2000 has no starting aids, and prior using Blue Diamond, it was nearly impossible to start in the mid 20′s and lower temperatures. After installing the Blue Diamond, the temperature can drop into the teens, and the engine starts almost as easily as if it were 70 degrees, and the engine runs with much less mechanical noise.

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  2. Scott

    5 out of 5

    I drive a 2005 F350 with a dreaded 6.0 and all I can tell you is I’ve been using this stuff since it first came out and Hot Shot’s Secret along with [Diesel Extreme] and the Blue Diamond Oil has saved that engine, and I know that because it’s a brand new engine. It’s also the third one that they’ve put in; so that’s all I’ve ever used in this engine. This engine is almost at 100,000 miles and I’ve had no problems with it whatsoever. I will continue to use Hot Shot’s Secret and I will continue to use all their products because Lubrication Specialties has landed on something that’s actually worth using over and over and over again.

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Blue Diamond is the premier oil choice because it reduces wear 20-30% more than it’s competitors, and will last 50,000–100,000 miles depending on driving conditions and the quality of the oil filter. Hot Shot’s Secret recommends pairing this high-quality oil with a Frantz Filter system to greatly lengthen drain intervals and extend engine life. Blue Diamond CI-4 Plus/SL variation contains 30-50% more detergents additives than the industry average.

Blue Diamond is available in either CJ-4/SN or CI-4 Plus/SL universal motor oil. Due to its 5W40 viscosity grade, Blue Diamond meets and greatly exceeds all heavy-duty diesel engine requirements for multigrade engine oil. A 100% pure synthetic motor oil, Blue Diamond is vastly superior to partial synthetics. In addition, Blue Diamond is formulated to meet and exceed API SL for gasoline engines.

Blue Diamond’s 5W viscosity at low temperatures allows it to replace conventional 5W30, 10W30, and 15W40 oils in diesel as well as gasoline engines. This 5w property also helps oil get to the top of the heads faster on cold starts, while still maintaining the viscosity needed at normal operating temperatures. This is especially helpful on diesels with HEUI injection systems, pressurizing the oil rails faster than a 15w-40 would.

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Blue Diamond offers:

  • Longer Drain Intervals
  • Less Wear
  • Reduced Maintenance
  • Wider Operating Temperature Range
  • Less Oil Consumption
  • Better Fuel Economy
  • High RPM “Turbo” Quality
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Blue Diamond is great for:

  • Fleets
  • Construction
  • Drilling Rigs
  • Heavy Duty Trucks
  • New Passenger Car Requirements
  • Gasoline and Diesel Engines
  • Turbo/Racing Engines
  • Arctic Service
  • Agriculture
  • Industrial
  • Stationary Engines
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Blue Diamond is fully compatible with all conventional mineral oil-based motor oils and fortified with a high detergent additive package with highly effective dispersants – making it suitable for all diesel engines where 15W40 is required. The CJ-4/SN version is 12 TBN and the CI-4 Plus/SL spec is 14 TBN. Its low volatility compared to conventional light neutral based oils greatly reduces oil consumption. The high detergency plus the exceptional oxidation and thermal stability prevents deposits and oil breakdown, making much longer drain intervals possible. Special anti-wear additives in superior lubrication basestocks plus super engine cleanliness spells elimination of most wear and reduction of maintenance. Blue Diamond is formulated for extreme cold temperatures as well as extreme high temperature service. Its 5W viscosity at low temperatures allows it to replace conventional 5W30, 10W30, and 15W40 oils in gasoline as well as diesel engines.

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