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Message: [QUOTE="ja_cain, post: 1487767, member: 11928"] That's crazy. My brother has been traveling so much that I haven't had a chance to get his take on the new spec. A while back he did share that statement that Ford released about not supporting the new spec. I've always wondered about the 7.3 propensity to produce higher levels of wear iron (I thought I read this once) possibly due to more cylinder surface area vs other designs? I guess if the sump is scaled with this difference relative to other engines the oil should be able to take care of the extra load. If it can keep the tan/tbn numbers acceptable over the service interval then everything should be ok with regards to iron catalyzed oxidation. Are there any other components that could be catalyzing this? I guess gas engines can have higher oxygen available due to the oxygenated fuels available now. I could see this causing a problem especially if the car isn't driven on a regular basis. Do/can they oxygenate diesel fuels? Btw, how many chassis dynos does LE have. I wounder if the lack of dyno testing vs bench testing is driving this? Real world testing is ultimately what needs to be done. Super expensive though. Sent from my SM-G930V using Tapatalk [/QUOTE]

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