I will be running a bypass filter setup using a Baldwin B164 filter, so is it safe to switch to a newer spec diesel oil? I know we have to run CJ4 due to the soot loading but the bypass should remove a lot of the soot thus I should be able to run the newer spec oils. I would love to keep running Rotella 5w40 but its $50 a jug locally, I can get Motul rated for Dmax, VW's, Mercedes etc for $25 a jug, hence my question. Thanks.