What oil do you run?
 

How many run the rotella? Or rotella synthetic? I seen a disscussuon on another forum about how rotella was junk but I've ran it for years and years. I had a 99 F350 7.3 with 472,000 on it when we sold it. Always ran rotella in it. What's yall's thoughts?

Rotella T6 for me. I only use fleetgard filters. LF 16035 oil and FS 19856 fuel. Got to change mine now... My cost at work for this was just over $92...

Rotella was factory fill for caterpillar for ages... most companies (including Cummins) use delo 400 now...

Motorcraft :D

Rotella here. Sometimes I run synthetic but not every time. Always motorcraft filters.

Rotella, sometimes I go synthetic, but always rotella with a motorcraft filter. My dad uses castrol in his 7.3.

Rotella 15w40 + 2 quarts Lucas Synthetic Stabilizer, Motocraft FL 1995 and one 12oz bottle of Prolong in the HPOP.
I ran full synthetic last change and will switch back this change.
I always gauge the condition of the dipstick as an indicator of the deposits left behind by inferior oils.
If I can't see the cross hatches on the dipstick thru the oil then it is dirty enough for a change.

My uncle is the shop steward/foreman for Cummins Crosspoint LLC, Cross Lanes, WV.
For 40 years he has worked there.

He says they used Valvoline with the ultraviolet dye marker for break-in oil on the larger engines like the QSK70
at that rebuild shop.
IDK maybe they switched to Delo 400 since he told me that.

http://i749.photobucket.com/albums/x...lmes/QSK70.jpg

I'm goin to start using that lucas stabizer too. I gotta fix my oil leak first.

Valvoline premium or extreme blue.

Rotella 15w-40 Here!

I use motorcraft in my stuff. My truck was always serviced at ford with motorcraft goodies so why change it? 275k and still goin strong. I did buy some different lube for my front and rear end, just lazy and havnt done it yet. I think its lucus oils.