Chevron Delo 15w40

[kodeman]

Had a quick question for you guys. Ive allways ran Delo in all my trucks and equipment. How many miles are you guys running between oil changes on your powerstroke?

[NCHornet]

This is asked quite often, you can use the search button to find all kinds of info. Modern oils are totally different than they were 15-20 years ago. I would suggest 3-5K , I do a UOA report every third oil change from Blackstone labs and every time they tell me the oil can go to 7500 next time and resample, but I don't go past 5K.

NCH

[Tsgs69400]

I have read many articles on this and the cj-4 oils are not as good as the previous CI-4 in terms of anti wear additives. Though they do better at collecting soot and preventing deposits.
The scientifical study which I read named the valvoline premium blue as the best with the delo and rotella close behind.
That is in terms of conventional oil. The synthetics obviously have an advantage over the regular.

[NCHornet]

Make sure you dig a little deeper when you read stuff like that. You will usually find the tests being paid for by the company that comes out on top. Happens all the time in advertising, keeps them from being sued!! Modern Dyno oils changed at the correct intervals are just fine, no need for synthetics. When in doubt have a UOA done. You can't believe what they can tell you about the condition of your engine. They also test trans, coolant, diff fluid, just about anything. I will continue to trust my UOA reports over anything else.

NCH