I just got off the phone with my local Ford dealer, I'm actually on a trip and 700 plus miles away from home. Currently the truck is a quart low and I can not find any Ford 10W30 CJ4 oil locally except at the dealer (and they want just at $5.00 per quart). I can find Rotella T5 10W30 and Ford branded 15W40. Anyway, my question -- my dealer, and the local Ford dealer service Dept head person both said that anything other than Ford branded WILL violate engine warranty. Not to start a flame session but has anyone else heard this; if so, why / what reason did they give. I know about the Magnuson-Moss Warranty Act(believe that is the spelling) but Ford has deeper pockets than I. I also see threads where many of you are using other brands of oil, so, as I ask, has anyone else been told this? Thanks.
Ron
Ron