Thats why i like Amsoil and Scheaffer there high temp shear is 4.3 and 4.5

 

I wonder how Delo 15w40 stacks up???

 

As a Delo user here, I have found my viscosity at 5k miles, at the lower range of Blackstones averages. And for the last two OA's, this has been the case, with light duty use (i.e. no heavy towing or loads). Not sure how this compares to other 15w40's. My wear metals and additive content, however, have consistently been well above average. FWIW....

 

Thanks for the information, I am surprised Delo was below average with Blackstones report in the viscosity area?

 

At least it is still within range of what they consider acceptable, albeit at the lower end. I am thinking this is due to a shorter work commute this past year, and the fact I am using the truck more as a daily driver. One way to work is 6 miles, with only 3 of those miles at freeway speeds. I would guess that I'm barely getting the EOT to it's peak by the time I get home or to work.

 

Thanks, good point.

 

With Baldwin bypass filtration, I'm going 17K on dino Delo. There's three Blackstones and three Baldwins in that mix.
http://springerpop.net/F350/images/Blackstone1.jpg

But that's when I dump it, due to viscosity shearing.

Pop

 

Thanks Pop, you have an awesome by pass set up.

 

5000 miles change filter, and 10000 miles oil and filter both along with fuel filter, But I drive alot of hwy miles pulling a 5K trailer. I am running Delvac 1300 diesel engine oil (mobil) this round, but have run shell Rotella in the past, no noticable difference, and no I dont send in oil samples, probably should but I dont, I figure my filter and oil change intervals as well as my driving habits are sufficiant.

 

Towing all the time can shorten the life of any oil, more heat, and more blow by when pulling. You could benefit form a oil bypass filter system, since you drive alot of high way, the more the motor run's the more it get's filtered.

 

I have decided to change the filter at 5k miles and do an oil analysis and go from there

 

I do agree with what you say about filtering alot more oil because of the amount of time the engine is running. But I am convinced that because of the amount of miles and time that I drive keeping the engine at operating temp prevents build up of particulates from the stop and go driving that so many people do these days.

If you look at it like this, anyone who has ever drove a car or truck with mostly highway miles and gets the motor up to operating temp for an extended period of time, gets longer and more usefull life out of there motor. it gives the engine time to disperse any moisture and keep sludge and contaminates to a minimal level.\

As opposed to someone who does alot of stop and go driving city driving etc where the motor never has a chance to clean out thus building up damaging sludge, varnish and other things. the life of that motor and vehical is always shorter than one that does mostly highway miles.

And of course a sample of the oil bye a reputable company would be the best thing to do. But from experience and working with and around diesel motors most of my life (yes I am telling my age) and being a mechanic as well I am more than comfortable with my decisions.

If you have ever heard of NORIA deals with how today lubricants break down less now days because of all the things that are put in it, as well as the refining process being so much better, that we really do get more and better usage out of our oils today than we used to. It is a proven fact that the death of almost all motors is from wear, metal shavings dirt, sludge etc.

So in that knowledge, clean oil, good filter, driving conditions, ie dirty enviroment, clean enviroment, hwy vs city etc. one has to make a decision on how often oil and filters need to be changed, as well as a good sample sent into get tested.

I know I said alot here, but I am just stating what works for me, because of my driving style, driving conditions, etc, I am more than confindent in comfortable with my maint schedual. Just food for thought, you wont believe this but here goes..... I have 8000 miles on this current oil change, and if you pull my stick and check the oil I can still see the hash marks on the dipstick thru the oil,,,, my oil is NOT black,,, how many of you out there can make that claim.....

Thank you for the great points you brought up, but we must all remember driving habits, and oil analysis is the best for oil change intervals

 

SAMW57 who is going to do you oil samples?

 

Blackstone Labs, i just ordered my free sample kit. the basic test is $25. http://www.blackstone-labs.com/tests-price-list.php

 

I just ordered my kit,,, so now the waiting game,,,, thanks again