Vehicle 2009 Chevy 3500 cutaway chassis. In service date Aug 2011 Engine: Duramax LMM Oil: Chevron Delo 5W40 Full Syn CJ4 for whole life. NO Additives! Filter: Fleetguard LF16102 Service Interval: 20,000 miles for oil and filter Below is a data summary report for this unit. On the right side are the averages and the max values for each measured item. TAN was not tested at every sample..hence only 12 counts vs 20. Filters are cut open at every service and checked. Will post pics if anyone interested. Unit has one more service interval on CJ4 and then will switch to CK4 Delo 5W40 syn.
Last edited by a moderator: