Valvoline Premium Blue Extreme SAE 5W-40 Full Synthetic Diesel Engine Oil 1 GA

This is the brand used in my 96 12valve. Seems to work well. 309k and still trudging along.

Great purchase and value if you have a diesel especially a Cummins. First oil change was done with Shell Rotella T6, which gave me no issues. But I don't drive my truck a lot so occasionally after sitting it would be a lil noisy on startup. With this oil my trick can sit for a month and have zero noise on startup which is great if you know anything about the noise some of these Cummins make or diesels in general. Performs great as I have no oil loss when conducting visual and mechanical checks of my truck. Like all oil changes it's pretty straight forward and easy to utilize. Definitely will purchase again when needed.

I don't know how I managed to get a box of 3 for 24.99 but it is way worth it at that. So far no issues on my 2005 5.9 cummins.

It's all I use

Mfg recommended, so I installed it and is running quite and smooth to Gulfport MS and back to Dallas TXAbout to complete an R/R and make another trip to Branson.I would highly recommend!

This is my preferred oil for my 5.9 Cummins. Usually put 10-15k miles on between changes using Donaldson DBL7349 oil filter. Never had an issue with it. Always on the hunt for the best pricing, and this time it happened to be Amazon. Paid $57 in 10/2018. Paid $82 in 04/23. About $5 per year for the privilege.

Great product and I will continue to purchase it

Valvoline Premium Blue Extreme SAE 5W-40 Full Synthetic is a high-performance engine oil specifically formulated for diesel engines, offering exceptional protection and performance. Here's a detailed review highlighting its key features and benefits:### Key Features**1. Full Synthetic Formula:** Made from premium synthetic base oils, Valvoline Premium Blue Extreme 5W-40 provides superior protection against engine wear, oxidation, and thermal breakdown compared to conventional oils.**2. Engine Protection:** Designed to meet the demanding requirements of modern diesel engines, it offers excellent lubrication at high temperatures and maintains consistent viscosity under various operating conditions.**3. Enhanced Fuel Efficiency:** The advanced formulation of Valvoline Premium Blue Extreme helps improve fuel efficiency by reducing internal friction, which contributes to lower operating costs over time.**4. Cold Weather Performance:** Offers excellent cold-start capabilities, ensuring quick oil circulation and protection during cold weather conditions, which is crucial for diesel engines operating in diverse climates.**5. Long Drain Intervals:** Suitable for extended drain intervals as recommended by engine manufacturers, providing convenience and cost savings for fleet and heavy-duty vehicle owners.### PerformanceUsers appreciate Valvoline Premium Blue Extreme SAE 5W-40 Full Synthetic for its reliability, performance under extreme conditions, and compatibility with a wide range of diesel engines. It is particularly favored for its ability to protect engines from wear, maintain cleanliness, and extend oil change intervals.### Pros and Cons**Pros:**- Full synthetic formulation for superior engine protection- Excellent performance in high temperatures and cold weather- Enhances fuel efficiency- Long drain intervals reduce maintenance costs- Trusted brand with a reputation for quality**Cons:**- Higher initial cost compared to conventional oils- Specific formulation tailored for diesel engines, not suitable for gasoline engines### ConclusionValvoline Premium Blue Extreme SAE 5W-40 Full Synthetic is an excellent choice for diesel engine owners seeking premium performance and protection. Its advanced synthetic formulation, coupled with enhanced fuel efficiency benefits and long-lasting durability, makes it a preferred oil among fleet operators, heavy-duty truck drivers, and diesel enthusiasts looking to optimize engine performance and longevity.