where in ny I am in long island and long island truck parts have great prices oil in 5gal pals . I use valvoline 5w/40 synthetic can get it there for $80 a pal, and they stock baldwin filters

 

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This is the good stuff....

 

15W/40 oil is what every cummins engine is supposed to use since about 1990.I use nothing bu Delo 400 15W/40 oil @ my shop,& have been for years.My job is nothing but electronic diesel engines troubleshooting,& repair.I do Cummins Volvo,& John Deer/Lugger marine.Trust me.The oil systems pressure valves,& some sensors are pre set for use with 15W/40 oil.