A little extra protection never hurts in my opinion. I think lots of people get turned off by Amsoil's marketing so they think it's not a good oil but the truth is it's one of the best, one of the first out there, and I've personally used this combo of the correct grade of Amsoil and Lucas for...
Amsoil 5w-40 Diesel Oil (CJ-4) with one quart of Lucas Original formula additive. I've been using this combo in not only my 2008 6.4 with 76k but all of my cars and trucks from Lincoln MKT to Audi A8 to Sprinter. Although Sprinter requires 5w-40 Euro to meet MB 229.51 standards
Sent from my...