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Rawze

(Yesterday )dd13cascadia Wrote: ...Full synthetic for lubricity, low ash count to extend the life of the dpf, and extended oil drains (if you want to. I don't.)
...

Sounds like your drinking the coolaide hard on that one?.

... and btw: Syn oils have ZERO advantage over top brands of dyno oils except in very extreme cold environments+ having to do regular cold starts. - Anyone who would say different is a salesman or is ill-informed.

NEXT: You mentioned extended oil changes ... (assuming you meant some kind of aftermarket bypass filtration + not changing oils for really long periods based on oil sampling)... THIS IS THE KISS OF DEATH and should NEVER EVER EVER be done on commercial equipment. Premature cam failures and other issues are the result. - Bypass filtration to reduce soot levels between oil changes on a non-deleted engine.. sure.. but extending the oil change intervals --- NOPE!

Here are the recommendations for the ISX... Unless there is some vastly different technology going one somewhere ... detroit DD13/15 should not be that much different ...

info on bypass filtration and for recommended oil change intervals for max engine life vs. oil change costs over a million miles: https://rawze.com/forums/showthread.php?...617#pid617

dd13cascadia

(Yesterday )Rawze Wrote:
(Yesterday )dd13cascadia Wrote: ...Full synthetic for lubricity, low ash count to extend the life of the dpf, and extended oil drains (if you want to. I don't.)
...

Sounds like your drinking the coolaide hard on that one?.

... and btw: Syn oils have ZERO advantage over top brands of dyno oils except in very extreme cold environments+ having to do regular cold starts. - Anyone who would say different is a salesman or is ill-informed.

NEXT: You mentioned extended oil changes ... (assuming you meant some kind of aftermarket bypass filtration + not changing oils for really long periods based on oil sampling)... THIS IS THE KISS OF DEATH and should NEVER EVER EVER be done on commercial equipment. Premature cam failures and other issues are the result. - Bypass filtration to reduce soot levels between oil changes on a non-deleted engine.. sure.. but extending the oil change intervals --- NOPE!

Here are the recommendations for the ISX... Unless there is some vastly different technology going one somewhere ... detroit DD13/15 should not be that much different ...

info on bypass filtration and for recommended oil change intervals for max engine life vs. oil change costs over a million miles: https://rawze.com/forums/showthread.php?...617#pid617

What cool aid exactly? That mineral is the same as synthetic? I mentioned extended oil drains, but I also said in the same sentence that I don't do them and in fact I actually change my oil every 40k km when according to Detroit's own recommendations I could go (for my, engine, mpg, use case) way longer than that.

I also posted 2 years worth of oil samples. Not really sure where's the confusion...

mikkhh

Some manufacturers even push 150 000 km oil changes, BUT their main new truck buying customers are big fleets who want to see the best fuel economy and lowest downtime and cheapest maintenance on paper, BUT those big fleets keep trucks up to 3-4 years or up to 400 000 - 500 000km. It seems cheaper for them, but next buyer is going to have a trashed truck that requires major overhaul. Manufacturer is also happy since they can sell engines or parts, service schedules are calculated in a way that trucks or whatever equipment would just get past warranty stage and fail catastrophically after that.

https://www.scania.com/content/dam/scani...2206EN.pdf
Those fancy press releases and super duper long long long long life oil change intervals are made to appeal to those who have zero clue about equipment, but are choosing what brand of trucks or equipment to buy.

If any used and abused emissions truck has oil consumption issues, that are mostly due to long long long long life extended oil change intervals, then aftertreatment issues are guaranteed. But big fleets do not care, since it is not their problem anymore.

Expensive synthetic oil is not required on most engines, since mineral oil lubricates well enough. Pressure lubricated parts never fail on a properly maintained engine, something else fails first - liners dropping, cracked heads, seized connecting rod bushing. Now somebody could argue about that, since lots of modern cars get spun bearings, but it is not due to oil, most of modern cars have never ever seen egr and intake manifold cleaning, most of them have omitted cranskhaft counterweights, have way too much low end torque from factory and are prone to warping crankshafts and that is why bearings get spun. I have taken apart quite a few car engines that are notorious for bearing issues, first thing I do is look for crankshaft runout by inspecting main bearing wear and then look with dial indicator. The main killer is soot and wear materials in oil, synthetic does not cure them... Only way to lower wear particle buildup in oil is to change oil more frequently.

dd13cascadia

I guess the sad-ish? part here, is the lack of appreciation for the oil samples and the data i have presented. Zero. Zilch. NADA. Everything, but.

Rawze

(Today )dd13cascadia Wrote: I guess the sad-ish? part here, is the lack of appreciation for the oil samples and the data i have presented. Zero. Zilch. NADA. Everything, but.

You put too much faith in oil sampling. Oil samples do not proper show molecule wear and other issues as the oil breaks down. That is the false ideology that most people get caught up into ... and it is not the full picture at all.

People put their faith in oil sampling like its some kind if religion,. and i do not tolerate it on here but for so long.

Oil sampling a good troubleshooting aide, but that is about as far as it goes.

Even your own oil sampling shows a VERY CLEAR TREND that comparative engine wear INCREASED when you went 30k, 33k, 35k+ miles at a stretch vs when you changed it at 29k miles. It increased by NEARLY 30% when you let it go more then 33-35k miles at a time, and more than 41% at 37k+ intervals .

-- This goes right back to what I said the first time. I was trying to be polite, but not any more.

Also... is that 1.3 mil miles without an inframe?.... If so, then your over-due to have a piston go thru the block with ZERO warning at this point. Good luck with that. Were the rods/main done at thew 800k mark?. Perhaps maybe a spun bearing right after your next oil change?. - Bragging that it has not been rebuilt yet with that many hours/miles is A RECIPE FOR COMPLETE ENGINE DESTRUCTION WITH ZERO WARNING!. It should have been inframed 200k miles ago.

Like I said. ... It is simply going to get you kicked off here if you keep trying to argue about it on here. This wwwsite is NOT social medai, and I do not placate fools but for so long. - I only replied this time gave you the temporary benefit of being ill-informed so far, and hopefully now you are starting to see the error of false belief you have been caught up into. - otherwise, your on the wrong forum of you want to keep arguing your point. - Not gonna happen.

This person has been muted to save them from their own further embarrassment.

mikkhh

What about oil change intervals on mandated engines ? I believe that 20 000km would be the absolute maximum oil change interval on trucks. Those engines have more soot load from EGR, higher exhaust and turbo temperatures, possibly more oil dilution due to dpf regens dumping extra fuel into engine. More wear and tear from cold start modes that prioritize heating up exhaust cans as fast as they can.

How the 40 000 km engine looks underneath the rocker cover? Is there any visible nasty tar or asphalt accumulating already? Or is it caramellized soot that does not come off the cams or anything. Also those super duper fancy expensive fully synthetics are thinner and have lower evaporation temperature, how that is going to help with reducing oil ending up in exhaust, especially if engine gets worn down?