So here goes my first ever post. Got a new ram hemi 2500, NO MDS, and i use it in what the manual would call severw service. Lots of off road, towing in hills,mud,snow, oil and logging roads, temps down to -45c, long idle times like up to 10-12 hours a day, well u get the picture. I was thinking of switching to chevron delo 400 0w30. Is this a good choice? Any suggestions on something better? Btw i put on a lots of kms a month usually between 5-10k km.