Hi folks, as a previous user of LE products I would suggest to give it a second try.My engine was a 7.3 psd which is completely diferent but my uoa was fantastic.I dont know if many people know about this company, which is on the top as r&d developers, the two global players are lubrication engineers from USA and kluber which is european. My flavor of choice back then was monolec 8800 engine oil combined with all trans 1150, after more than 200 drag strip passes,300,000 miles on original transmission, injectors and engine tuned to 325hp @ wheels and still going its hard to beat data without being to sientific.my other van was a 5.8 gasser with 375,000 and still rinning, so my advice would be give it a second chance, get in touch with them and report back so others know what to expect, still think you won't be disappointed, best regards Roderick from Puerto Rico.