I have a real problem with availability here for oil filters other than fram etc, and would rather not have to rely solely on mail order. Can anyone direct me to any kind of a rating site for filters. Some boards say only use Hengst, Mann etc but my only source locally even for Bosch charges over list for the filter to fit my 83 300d.( And I found out that boschusa filters are made by champion) Are there any others that are good to use (purolator etc)? I am looking at changing over to Rotella T Synthetic 5w-40. Anyone have any experience with this oil yet? Thanks Steve