Here's the latest UOA w/TAN acid# for our 1995 DD12.7L 60 series with 123,100k miles. Oil and filters were new 24 mths & 10,200 miles ago. Engine is in a 1996 Prevost bus/mh that weighs 41k to 46k #s, depending on what I'm towing (or not), going down the road at 65 mph. Avg mpg is 8 mpg. Engine does not consume any oil between changes. We no longer pull a stacker (sold in 2022).
The oil in this report (#7) is Amsoil AME Synthetic HD Diesel & Marine 15w40. https://amsoilcontent.com/ams/lit/databulletins/g473.pdf The oil filters are dual Fleetguard # LF9620, their "Venturi Combo" design: https://www.cumminsfiltration.com/venturi .
Oil viscosity has thinned a little but still in the 40w range. Starts life new at 15.4 cSt. Norm for 40w is 12.5 cSt to 16.3 cSt. TBN (additive package) is still plentiful.
Report looks good to me. I'm not changing the oil anytime soon. But I am going to change w/new the dual oil filters, Fleetguard LF9620.
Report #1 oil was 80% Amsoil 10w-40 HDEO and 20% Rotella T-3 15w-40 HDEO.
Reports #2 & #3 were the same load of 90% Delo LE 15w-40 and 10% Rotella T-3 HDEO.
Reports #4, #5, and #6 were for 3 different loads of Mobil Delvac Super 1300 15w-40 HDEO.
Reports #7 & #8 are this load of Amsoil AME 15w40.
What say you?
The oil in this report (#7) is Amsoil AME Synthetic HD Diesel & Marine 15w40. https://amsoilcontent.com/ams/lit/databulletins/g473.pdf The oil filters are dual Fleetguard # LF9620, their "Venturi Combo" design: https://www.cumminsfiltration.com/venturi .
Oil viscosity has thinned a little but still in the 40w range. Starts life new at 15.4 cSt. Norm for 40w is 12.5 cSt to 16.3 cSt. TBN (additive package) is still plentiful.
Report looks good to me. I'm not changing the oil anytime soon. But I am going to change w/new the dual oil filters, Fleetguard LF9620.
Report #1 oil was 80% Amsoil 10w-40 HDEO and 20% Rotella T-3 15w-40 HDEO.
Reports #2 & #3 were the same load of 90% Delo LE 15w-40 and 10% Rotella T-3 HDEO.
Reports #4, #5, and #6 were for 3 different loads of Mobil Delvac Super 1300 15w-40 HDEO.
Reports #7 & #8 are this load of Amsoil AME 15w40.
What say you?