How often to change oil over 500K?

That works. There are worse choices. 1300 is a good oil.

 

Again, can't argue with that. One has to live within their own comfort zone. There is no one size fits all solution to anything, and there is nothing wrong with your approach. We can all make arguments for why we do what we do, but in the final chapter, we all have to do what works for us and helps us sleep well at night. I would only suggest running a oil sample at the next few changes and see how that helps with any decision to make any changes to what you are using or how long you are using it. Might as well take advantage of some of the resources available to come to a more informed conclusion. And again.... to help you rest easy at night.

 

Delo400 beat the 1300

 

Please show analysis to support your contention. Blanket statements should be supported in fact.

I cannot compare 1300 to the Delo, but I can compare the Delo 400 to the Schaeffer I am presently using, in the same motor. The Delo sheared out of viscosity to 12.7 from its starting of 14.6 in roughly 14,000 miles on several samples. The Schaeffer I am using only sheared to 13.8 in 20,000 miles and has stayed around 14 in most. It starts at 14.5. The Delo had sheared to lowest level of allowed viscosity tolerance, just short of being outside tolerance. The Delo had a Zinc of 1141 and Phosphorus of 931 where as the Schaeffer shows a Zinc of 1429 and a Phosphorus of 1104. That shows the Schaeffer has a significantly stronger extreme pressure control component of the oil than Delo. Very important for cam lobe and bearing protection. And combined with a healthy dose of Moly in the Schaeffer, a significant friction modification package. Delo had a Calcium of 733 where as the Schaeffer shows 1161, again the Schaeffer showing a stronger acid fighting and detergent capability. And all metal wear numbers have been several points lower across the spectrum on the Schaeffer than the Delo. I had 6 samples on the Delo and have had 8 on the Schaeffer. A balanced approach. I didn't do analysis each and every time, but enough to develop trend lines that are important to determine how an oil is holding up.

I have seen some respectable UOA's on 1300 and have no reason to think it is not a good oil also. Actually I am quite impressed with the latest Delvac Elite syn blend analysis I have seen from others that have provided them. The Delvac Elite is a killer oil, one that I would give a try if I couldn't get what I am using now.

Again, each engine is different and results will be different. There is no one sure perfect oil for every application. All the major brands are adequate. Some just perform better in some engines than in others, as metallurgy and other factors come into play. Only valid used oil analysis can determine if what you are using will do the job. In my case, in my engine, Delo dropped the ball.

 

So many analysis show that you google it and you can see it .

 

My 04 d12 came with the bypass setup. I have an spy so my truck does not idle. I change mine every 30k (roughly). It has 1.4mill problem free milled on it now.

 

You are quick to point out we should do the research to prove you wrong, but you are not willing to prove you are right. So if we do not spend a batch of time researching out the issue across the internet, then you are automatically right. I posted the results I got, on the same motor, and showed the variances between Delo and the oil I am using. If you want to stick with the Delo is superior to the 1300, then do likewise. Show us the results from you using both oils in the same motor and show us that your contention is valid. I have no bone one way or the other, as I am not brand loyal to any brand. But the only way to make your case is to show us how you determined what you state based on analysis you have done on both oils in your motor over several oil changes to develop trend lines on each. I wouldn't pretend to compare my analysis with what anyone else gets in their motor, as no two motors are identical. I only can show what I got in my motor with the oils I tried. Please do likewise.