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.
I noticed on your web site that the Mobil 1 Turbo Diesel Truck 5W-40 is rated CJ-4. I currently use Mobil Delvac 1 ESP 5W-40, which is also rated CJ-4 in my 2008 Chevrolet 2500HD Duramax Diesel. Are t...
Both products have different formulations and both exceed API CJ-4 requirements. Either product, however, can be used in your particular engine. Mobil 1 Turbo Diesel Truck 5W-40 is specifically formul...
