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Diesel Engines
Is it OK to use CF-4 Motor Oil in a Volkswagen TDI Engine?
I have a VW TDI 1.9 turbo diesel year 2003, 5000 mile oil changes. Currently using Mobil 1 5W-40 light truck diesel rated CI-4. Have used Mobil 1 15W-50 rated CF-4 in the summer, can I continue this p...
We recommend you use Mobil 1 Turbo Diesel Truck 5W-40 all year as it is the best choice for this application.
What Are the Benefits of Low Ash Oil?
What are the benefits of using "low ash" oil? I have some Mobil 1 low ash for my Mercedes diesel. Can it be used elsewhere?
Low ash oils typically are used for diesel vehicles that have a DPF (Diesel Particulate Filter) so the carryover oil that makes it into the exhaust system does not foul the particulate filter.  We rec...
Best Oil for Achieving High Mileage in Turbo Diesel Engines
We have a '98 Suburban with a t/d 6.5 with 255,000 miles. It has been run with Mobil Delvac 1 since about 75,000 miles (prior was Mobil 1). Engine is great; changed every 5k approximately. We also hav...
Mobil Delvac 1 ESP 5W-40 is a fully synthetic supreme performance heavy duty diesel engine oil that helps extend engine life while providing long drain capability and potential fuel economy for modern...
Was a Dodge Ram Harmed Since CJ-4 Oil Not Used
I have a 2001 Ram diesel truck with 57,000 miles on it. I've used Mobil 1 15W-50 since it had 500 miles on it. I will be switching to the new 5W-40 turbo diesel truck. Did I do harm to my engine becau...
No.  CJ-4 is a certification valid for 2007 and newer engines due to new EPA requirements.  You should be fine.
Which Motor Oil Is Best for Engines Using E85 Fuel
I am using E85 fuel in a converted Honda engine originally not designed for its use. One of the primary concerns of this is the formic acid created in the event of water contamination of the fuel. I h...
We recommend you use a heavy duty diesel product if you want additional acid neutralizer. We recommend you try Mobil 1 Turbo Diesel Truck 5W-40 as it is based on HD diesel technology, which contains a...
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