I just hit 100k miles on the truck in my sig, I've always ran CJ4 15W40 at 5-6k intervals. I just went to Wal Mart and was trying to decide between the Mobil Delvac 15W40 CK4 for 10.97 a gallon, and the Motorcraft 15W40 which has the 1000 ppm phosphorus, which Im assuming is CJ4 spec, for 18.68 for a 5 quart jug.
I ended up going with the Delvac CK4, my question is, should I return it and get the Motorcraft? Will the Motorcraft be that much better in terms of wear protection, or will the Delvac work just fine?
I'm not hard on this truck, it never goes past 75 mph on the rare interstate trip I do take..lives an easy life.
I ended up going with the Delvac CK4, my question is, should I return it and get the Motorcraft? Will the Motorcraft be that much better in terms of wear protection, or will the Delvac work just fine?
I'm not hard on this truck, it never goes past 75 mph on the rare interstate trip I do take..lives an easy life.