I did and found it really interesting esp in light of the 'oil wars' over in the oil/lube forum. I think the claims JD makes about their 50+ engine oil being better than off the shelf products was most interesting. IIRC this is similar to the claim NH makes (made?) about their Ambragold product. Although I dont think NH backs that up w/ the 50% oil change extension claim like JD does. Sadly imperical data was missing from the conversation and I would have liked to hear that. What does their additive pkg really buy you in terms of MTBF/reduced maint costs (other than longer periods between oil changes)? They never said a word about who they partner w/ to do all the work but it seems some amt of the research goes on in-house.