Mobil Delvac 1300 Super Heavy Duty Premium Synthetic Blend Diesel Engine Oil 15W-40, 1 Gallon

We have a fleet of six offshore charter fishing boats, all with Caterpillar diesels. This oil is recommended by the Cat dealer as the oil to use if you want to keep up with the specs in your warranty Lots of years with NO trouble. The only motor oil We use

I prefer this oil for my recently purchased diesel truck. It's a 1996 F-350 turbo powerstroke and has 345,000 miles, so a long engine life oil is important to me. It holds 15 quarts so it's great, and makes sense, to buy it in the 5 gallon buckets. I will continue to use it and was also recommended by my son.

Even though prices are steadily on the rise ,Walmart has some of the great low prices , automotive , diesel trucks ect ,I will go there first before I go to the corner part store because more than likely Walmart or Walmart. Com will have it.

This is all we use in our diesel trucks. Works well and no issues with our engine. Since we only drive diesel trucks, we go through a lot of this oil.

put this in my 6.4 powerstroke and change every 8k seems to be working great for me so far. I have used this 3 times already I don't know how they can sell it so cheap but I like this product best for the price if you ask me

I wonder why they call this synthetic oil when they have another labeled bottle marked full synthetic and it cost more, this bottle does not show it being synthetic oil, I still use it but would like to know the answer to this.

I have used Delvac exclusively in my DD15 for its entire life. 888,000 miles and counting. With NO rebuild! Changed at 25k give or take with 1 gallon of Lucas also included. Never had a bad oil sample report.

Use in my semi for years. Prefer Mobil to be used in my heavy trucks as well as my personal cars. Mobil is cleaner oil and my semi use to leak using Rotella oil. When started to use Mobil Delvac I have no issues of leaking or nor have to add to oil between oil changes.

The product was as described and performed as expected. However, during shipping, the bottle was squeezed hard enough to break the seal and it leaked some. I had placed the package was placed on the floor of my garage for a few days prior to use. When the package was picked up, there was a oil stain on the concrete. While not much oil was lost, the clean up of the concrete takes time.

I worked for a Shell Distributor for 33 years and have always been partial to Shell T4 1540, however when Shell went to has to liquid technology customers started to have issue with oil pressure and consumption. When I left the oil company I switched to Mobil and notice my equipment carried better oil pressure and no consumption. There for I feel Mobil oil has better technology.