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The Answer Column

Answers to questions about ROTELLA, diesel engines and everything else related to heavy-duty applications.

1. How does a Diesel Particulate Filter work and how do I care for it?
2. How important is it to regularly grease my truck? 
3. How important is oil analysis to a preventive maintenance program?
4. How is synthetic motor oil different from conventional motor oil and what are the benefits?
5. Should I switch to an Extended Life Coolant?
6. Do Synthetic Lubricants Provide Protection and Potential Fuel Savings?
7. What are the benefits of using API CJ-4 motor oil?
8. What do motor oil weights mean and is low-viscosity oil too thin to use in my engine?
9. What is Biodiesel fuel and is it safe to use in my engine?