OK, So yesterday I took a trip to a Case dealership.We talked price ext. I was asking about maintenance. Motor oil, grease, filters bla bla bla.Well the salesman asked the man behind the counter.This is when the **** hit the fan.I asked about filters. he told me that Baldwin filters are what is recommended.I asked about Wix. BTW,I am a long time Wix user and will continue to be so.He showed his ignorance telling me that the Wix brand does not meet the requirements that Case requires.I asked him to show me some sort of documentation. My request went unanswered.So next I asked about motor oil.He immediately told me not to use Rotella.He said that mini excavators do not work well with this. I told him that many over the road trucks use this with great reviews.Now I am getting hot.Show me some scientific data I thundered.Until I see this all you have is hearsay.Well now his face is turning red, his veins are showing in his neck.So I don't think that I am now welcome to this dealership.Anyway I told the salesman what I thought about his coworker. Anyway I will see my Yanmar dealer next week. So what would be a quality motor oil,fuel, and air filter to use in a new machine? The machine is a three cylinder diesel.Thanks.I just have to call a spade a spade. I dislike it when someone spouts off with information without some sort of evidence to back up there claim.Thanks for letting me vent!