12-12-2016,
Looking at that link delo 400 would be better as it has the most zinc. Less detergent but a lower base number
(12-11-2016 )Jarhead79 Wrote: [ -> ]Rotella is sad. Does about as much good as Lucas.
(09-10-2018 )Diesel_Pusher Wrote: [ -> ]Was recently reading a Blog by SAE engineer 540RAT : Tech Facts No Myths...Motor Oil Engineering Test Data.
I spent about three hour on his site. Much, if not most, information
was about cars (small gas engines), but could be generally applied to large trucks.
The bit about oil additives was a eye opener
One was high levels of ZINC are not helpful and actually cause cam damage.
I wont be buying Royal Purple at a premium ever again.
A couple of the AmsOil products tested incredibly high in all categories.
Oil PSI is the resistance to flow, (New bearings). Lower PSI ( Thinner oil) with higher flow resulted in lower oil temps and less oil breakdown.
(09-10-2018 )Brock Wrote: [ -> ]I'm not 100% positive on this but I seem to remember having the opposite effect when I switched my cat c15 from 15w40 to a 5w30, I remember the oil pressure dropping a bit but I also remember my truck was running hotter oil temps which was opposite of what all the fancy oil guys said it would do.
(09-10-2018 )schISM Wrote: [ -> ](09-10-2018 )Brock Wrote: [ -> ]I'm not 100% positive on this but I seem to remember having the opposite effect when I switched my cat c15 from 15w40 to a 5w30, I remember the oil pressure dropping a bit but I also remember my truck was running hotter oil temps which was opposite of what all the fancy oil guys said it would do.
Your SDP appeared to run hotter oil temps because the Accert Cats never used an oil temp sensor. The ecm calculated the temp using coolant/oil pressure. When it saw the coolant up to temp and the oil pressure down it calculated a higher oil temp based on 15w40 viscosity. 5w30 is way thin for a diesel even in the cold you guys get. IMO.