When I got this truck I found out the previous owner ran 15-40 mineral oil.
I have always ran synthetic in most of my vehicles and wanted to do the same with my truck.
I live in saint Louis but had two trips to Wyoming and one to Montana planed for the heart of the
winter with my new diesel truck [new to me].
The advice I got from the diesel locals in “cold country” was to run Turbo-Diesel Mobil 1 [5W-40W]
Well now summer is coming and I feel a bit nervous running 5W instead of 15W like the book says.
The oil pressure is not low in fact it is at the top of the range when I start up and will not drop
below the middle of the range at all.
I am starting to switch over my car's oil to Castrol Edge after reading some of THEIR charts that
show it protecting 8 times as well as Mobil 1.
The two oil's I am thinking about using[mostly because they are 15W SYNTHETIC.] are
Castrol Textron Extra 15W-40W or Royal Purple[turbo-diesel]15W-40W.
I am the kind of guy who likes to see charts and graphs more than opinion but as I have many
opinions myself', I still defiantly factor them into my decision and welcome them now.
I also know there is some Amsoil guys on the forum and although I Would like to hear what
they have to say; I Kind of like to keep it simple and just drive two miles away and pick my
oil up at the store instead of ordering it or going out of my way for it.
Dodge 2500 SB club-cab 6-speed Edge fass
two-stroke 2”level kit posi rear end 2002