You really think an engine with a bit of blowby will burn off less Delo than Rotella? You're not the first person to say that. It could be true...I have thought about trying some in my engine, my only worry is that it has just about only seen Rotella most of its life. It still shows good oil readings, but especially after that first 2 quarts burn off and I have to add some it usually goes through quite a bit of oil, from leaks, blowby, vanishes into thin air..
After years and years of running all kinds of big trucks and smaller diesels, I can say without a doubt that the Delo will not burn off as fast as the others ( non synthetics, that is ) Rotella will cook off fairly quickly if there any ring wear at all, The Rotella and the Delvac clean a bit better, but they both burn off quicker.
The gumby brand no name stuff and Coastal and most of the other cheapies will cook off REAL fast, but won't make much difference if it's leaking out onto the ground as fast as you pour it in.
If you're loosing it more to burning, giving the oil system a good cleaning can help a bunch. Diesel rings get gunked up with soot and other nasties over time and get sticky. This can lower compression and cause excess blowby and oil consumption. Best thing I've found is running a couple of treatments of
Auto Rx I've revived quite a few old oil inhaling diesels with that stuff, it does wonders for seal leaks too.
------------Robert