The ram 1500 is based on 100% synthetic oil. The 3.0L v6 engine uses the sae 5w-40 with a 10-quarter oil capacity. 3.6L v6 favors sae 5w-20 and carries 5.9 Quarts. The powerful 5.7L v8 engine also runs on sae 5w-20 and is capable of handling 7 quarts of oil.

Valvoline Premium Extreme Full Synthetic Engine Oil 5W-40 Another product recommended by Cummins to use on their engine. This 5W-40 viscosity graded oil is an upgrade from the conventional 15W-40.

2007 – 2017 Ram 2500/3500, 6.7L Cummins Fluid Specs & Capacities

Cummins specifically recommends two Valvoline oils for its engines. The 15W-40 oil is for temperatures above 0 degrees Fahrenheit while the 5W-40 is for extremely cold temperatures.

List & Comparison of the Best 15w40 Diesel Oils:

Rotella t4 is what most of us use. It’s great and recommended oil for the ISX.

Torkelson explained that Valvoline “had to balance the capability to perform in a higher-temperature engine like a natural gas engine while having the capability to function in a lower temperature engine as a diesel engine – although as diesel engines have evolved, they’re getting hotter and hotter.”

Overview:

• Mag 1 Full Synthetic 5W-30 Motor Oil. MAG 1® Full Synthetic 5W-30 is one of the purest and most advanced motor oil products currently available.
• Mobil Super 5W-30 Synthetic Motor Oil.
• Royal Purple Synthetic Motor Oil.
• Castrol EDGE Extended Performance 5W-30.
• Valvoline SynPower 5W-20 Full Synthetic Motor Oil.

ADVANTAGE 15W-40 HEAVY DUTY DIESEL ENGINE OIL is formulated to meet or exceed the warranty requirements of most manufacturers of diesel and gasoline engines. It is designed for older engines and higher sulfur fuels (500 ppm and above)….ADVANTAGE 15W-40 HEAVY DUTY DIESEL ENGINE OIL.

Delo flows somewhat better than Rotella at all lower temperatures because it has a higher viscosity index. 3. Delo base oil should hold up considerably longer than Rotella since it is much more oxidation resistant.

It is safe to use a diesel oil in your gasoline engine, provided the diesel oil meets the appropriate specifications and viscosity requirements of your engine.

5w30 flows better than 15w40. 5w30 provides best cold start properties. Using 15w40 instead of 5w30 will increase your fuel consumption because of more load on your engine’s crank. No, head gaskets have nothing to do with the oil.

Rotella oils like T3 15w-40 meets both the API CJ-4 and SM specifications, and may be used in both gasoline and diesel engines. Therefore, Rotella is not recommended for gasoline vehicles with catalytic converters due to the higher risk of damaging these emission controls.

Therein lies the first major difference between the oils. Diesel engine oils have a higher anti-wear (AW) load in the form of zinc dialkyldithiophosphate (ZDDP). The catalytic converters in diesel systems are designed to be able to deal with this problem, while the gasoline systems are not.

6 Signs Your Car’s Oil Needs Changing

1. Check Engine or Oil Change Light. The most obvious alert that there’s an issue with your oil will come from the car itself.
2. Engine Noise and Knocking.
3. Dark, Dirty Oil.
4. Oil Smell Inside the Car.
5. Exhaust Smoke.
6. Excessive Mileage.

The short answer is… yes. If you don’t have a choice, adding synthetic oil to regular oil can help you out in a pinch. However, this should only be a stop-gap until you get to your nearest oil change provider.

Diesel Design and Engineering The crankshaft, camshaft and cylinder heads are all much larger. Internally, diesel engines have much larger bearing sizes which means more oil clearance. More oil lubricating the parts equals less wear. Diesel engines also have a much larger oil capacity.

In most cases it is normal for diesel oil to turn black. This change is typically noticed several hundred miles after an oil change. This does not necessarily mean the oil is dirty or that the engine’s internals are dirty. Below are a few reasons why diesel oil turns black.