Wait till you get a repair bill for the DPF on that pile. Or are you the typical own till warranty expires VW guy?
I have a track record of keeping my vehicles long after the warranty period has ended. Federal law on emission system warranty on cars and trucks is 80K miles or 8 years, whichever occurs first. This is my first VW though so we will see. There is absolutely no reason to believe it will or should fail prematurely. There is a great deal of information on this. Ash loading in the DPF is to be checked at 120K miles, and every 20K after. Many reports indicate 120K miles with driving habits/environments similar to me, and have, many, many, many thousands to go before ash loading becomes a problem.
With my perception of your logic, is the same as saying, "wait till your engine crank case oil pump stops working, that will be a gigantic bill" or don't drive your pick-up with a load firewood in the back because when you blow a front tire, you might die.
:duh:
I will say this along with my original post people tend to keep tractors a lot longer than cars or trucks and I will be the first to tell you that when everything is working right there's not a problem. It comes when your unit is out of warranty and when a problem arises it can't be diagnosed like old style mechanical engines you have to have special equipment to even communicate with it price some of this. The guys selling this stuff will tell you it's not going to be a problem ask them for a 20 year emission warranty and see what they say.
A lot of people only put 40 to 60 hours a year on their machines not a daily driver check and see what kind of shelf live DEF has. Just food for thought
I agree, in my experiences that tractors hang around quite a bit longer than vehicles. Diagnosing though, seems to be a moot point. I have a decent shop full of tools, and reasonable mechanical ability/theory. You are absolutely right as far as diagnosing though, the newer systems aren't the same is the older systems. What I don't get (I'm assuming here) that most tractor owners don't have the right equipment to properly diagnose the older style stuff either. I don't have a way to check injector pump pressure, pump timing, injectors flow, ect ect. If the owner does, I can see a gripe. If not, what difference does it make?
One nice thing about technology, as it becomes more wide spread, the cost goes WAY down, and continues to get better, electronics anyhow.
The only reason my manufacturers put warranties on anything, is to help sell their product. I can warranty a piece of junk for 1000 years and it will still be a piece of junk, indefenitly. Just because a item has a lifetime warranty, does that make it a better product?
DEF and DPF are 2 hair-brain ideas that won't be around long. What kills me is people don't HAVE to buy this garbage. No one's forcing anyone to buy anything, if the public simply stood up and said we don't want this crap and we're not buying it things would change in a hurry.
Not sure why you call it crap/garbage? Is this what the public said about Tetraethyllead?
Oh wait, this is better for everyone, and the future of world (just kidding

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I've recently done some mechanic work on new autos and light trucks and was amazed at how they have cheapened things up in just the last few years. Sheet metal is very thin, lots of plastic where it shouldn't be, nothing is greaseable or rebuildable anymore, no thought put into ease of service, and the list goes on and on. It has made me very grateful for my older but serviceable trucks ('69 F-350, '72 GMC C5500, '75 C60, '88 F-250) and I'll be taking them through the shop for a full-nut-and-bolt restoration as I get the time.
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My experience between a '84 ford f250 351 holley 4bbl 4x2 in the mid 90's, comparing to the 2006 2500HD GMC w6.0L 4x4 W/T gasser, today is vastly different than yours. In my honest opinion, there is nothing, not one thing is or was where the ford was superior in anyway than the HD. Heck, the HD went 100K miles before its first brake job. It still doesn't even leak on drop of oil, anywhere after 135K miles. Minimal repair for the work it has done. It does work, it pulls a 24' goose.