Shell Rotella® T6 Multi-Vehicle 5W-30 performs extremely well in both diesel and gasoline engines, allowing mixed fleet customers to consolidate lubricants.

API CJ-4/SN Shell ROTELLA® T6 SAE 0W-40 meets the API CJ-4/SN, Volvo VDS-3, and Mack EO-N, and Caterpillar ECF-3, ECF-2 and ECF-1A specifications. It is suitable for modern vehicles that have 2010 emissions compliant engines and after treatment systems, which require CJ-4 engine oil.

Shell Rotella® T6 15W-40 provides better cold cranking properties and low temperature pumpability at -15C compared to conventional and synthetic blend Shell Rotella 15W-40 products. That means it reaches critical engine parts faster in colder temperatures, to minimize wear and make hard work easier in cold climates.

Shell Rotella T6 10W-30, a full synthetic heavy duty diesel engine oil is now available. T6 10W-30 can be used in place of a 15W-40 engine oil in most instances and is suitable for use with biodiesel fuel.

As a rule, diesel engine oil possesses a much lower temperature pumpability and far higher viscosity in comparison to gas engine oil. As a result, if diesel was used in a gas engine, numerous issues may arise, such as premature wear leading and excessive heat generation leading to damage.

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.

It's generally accepted that petroleum-based engine oil starts oxidizing (breaking down) around 240 degrees F (115 degrees Celsius), while full synthetics, such as Rotella T6, can handle temperatures above 300 degrees F.

The service rating of passenger car and commercial automotive motor oils is classified by the American Petroleum Institute (API). The program certifies that an oil meets certain quality and performance standards.

Shell Rotella T6 Full Synthetic heavy-duty engine oil with Triple Protection Plus™ technology has been enhanced with fully synthetic base oil plus advanced additive technology to provide protection against wear, deposits and oil breakdown, PLUS better low temperature flow and better fuel economy performance1.

Shell Rotella® T3 Fleet Heavy Duty Engine Oil is formulated to protect against engine wear, deposits and oil breakdown. T3 Fleet helps provide reliable protection and performance in fleet and off-highway equipment, offering the convenience of a single oil suitable for a wide range of vehicle manufacturers.

Shell Rotella® T4 NG Plus 15W-40 provides excellent protection for mixed fleets, meeting a wide range of specifications for Natural Gas Engine Oil, Heavy Duty Diesel Engine Oil and Passenger Car Motor Oil.

10w30 is thinner than 15w40, meaning it flows through the engine more easily but doesn't have as high of a film strength as 15w40. While 15w50 is thicker, it has a higher film strength, offering better part protection.