[AT] Synthetic Oil

Dennis Johnson moscowengnr at outlook.com
Mon Nov 14 15:22:11 PST 2016


Gil,

Most cars with turbos do not have factory spin down lubrication. The result is turbochargers become a wear item. My Buick GN has been parked for various reasons, one being it needs a 3rd turbo. My EcoDiesel got a turbo change at 111,xxx miles.

DPF units on most diesels are also a wear item that gets plugged at times. My EcoDiesel DPF failed about 111,xxx miles. They are supposed to regenerate themselves to self clean, but sometimes that does not work. One guess is that turbos leaking oil may contribute to plugging. Friend of mine recently has his DPF changed due to failure on an 2015 pickup. Neighbor has F250 and recently removed his plugged DPF. My EcoDiesel catalytic converter failed about 50,xxx miles, and was replaced under warranty. Other neighbor is service writer for dealership and has seem several emission parts fail, many times with no warranty.

Thanks
Dennis

Sent from my iPad

> On Nov 14, 2016, at 5:00 PM, "vschwartz1 at comcast.net" <vschwartz1 at comcast.net> wrote:
> 
> Stephen/Spencer; 
> These comments now bring up two more questions. How does the VW turbo get it's bearing lubrication on engine shut down? Or is that the reason for the high dollar oil. I know that automotive turbo's need some type of lubrication for the spin down from the high RPM's of some operation. Don't know, maybe the VW doesn't have that problem or addresses it some other way. Comments???? 
> Second question. Does that DPF ever need to be cleaned or replaced? I have noticed that most all large trucks now apparently run with a DPF because very few emit smoke or even odor for that matter. When you see smoke it is usually from an older engine or there is something wrong with the engine. 
> GIL 
> 
> ----- Original Message -----
> 
> From: "Stephen Offiler" <soffiler at gmail.com> 
> To: "Antique" <at at lists.antique-tractor.com> 
> Sent: Monday, November 14, 2016 6:41:42 AM 
> Subject: Re: [AT] Synthetic Oil 
> 
> I've got a VW TDI also (mine is a 2013 Jetta Sportwagen) and I found 
> Spencer's lab test results very interesting. In my case, I must admit that 
> the free scheduled maintenance for 3 yrs 36K miles did its job: get the 
> customer comfortable with returning to the dealer for maintenance. With 
> 57K right now, I've never even lifted the hood on that car except to fill 
> the windshield washer fluid. I am going to miss it when it's gone. 
> 
> A comment on the fancy oil VW requires. Yes it's turbocharged as Spencer 
> mentioned, which creates certain oil requirements, and beyond that is the 
> issue of the Diesel Particulate Filter. It is this emission control device 
> that removes the characteristic diesel smoke and odor. But the DPF is 
> sensitive to ash buildup, and therefore requires a "Low Ash" motor oil. 
> (True for any diesel equipped with DPF, not just VW) 
> 
> SO 
> 
> 
>> On Mon, Nov 14, 2016 at 7:14 AM, Spencer Yost <yostsw at atis.net> wrote: 
>> 
>> It does have one Gil. 
>> 
>> Or use 15-40 Rotella in my Ford 861D. It seems to work 
>> 
>> Spencer Yost 
>> 
>>> On Nov 13, 2016, at 10:13 PM, vschwartz1 at comcast.net wrote: 
>>> 
>>> Spencer, does that VW have a turbo? 
>>> 
>>> ----- Original Message ----- 
>>> 
>>> From: "Spencer Yost" <yostsw at atis.net> 
>>> To: "Antique" <at at lists.antique-tractor.com> 
>>> Sent: Sunday, November 13, 2016 8:17:45 PM 
>>> Subject: Re: [AT] Synthetic Oil 
>>> 
>>> The only bad thing about my VW diesel(beside dieselgate) , is that it 
>> requires a synthetic oil that's pretty expensive. And it called for oil 
>> change intervals of 10,000 miles. I've never been a fan of oil change 
>> intervals that are that extended and I am certainly not a fan of expensive 
>> synthetic oil. But because of that expense I decided to use Blackstone 
>> lab's oil analysis reports to ensure that these extended intervals actually 
>> were valid. 
>>> 
>>> After the free oil changes up to 36K miles, I changed the oil at 10,000 
>> miles and sent a sample. Oil was absolutely great and still within spec. 
>> Next oil change I want to 11K and still within spec. And so on our way up 
>> to 13,000 miles. Oil was still completely 100% within spec and no metals 
>> that would indicate excessive wear. I stopped there but I could probably 
>> could change at 15K. 
>>> 
>>> So I do believe in those 10,000 mile intervals with synthetic oil for 
>> that engine. I'll be glad to post the reports if anyone's interested. 
>>> 
>>> However.... 
>>> 
>>> I did it for my Ford power stroke 6.0 L engine too. The shear properties 
>> of synthetic oil begin to degrade at 10k miles. So I use regular Dino oil 
>> and change every 3000 miles on that one. 
>>> 
>>> Hope this helps, 
>>> 
>>> Spencer Yost 
>>> 
>>> 
>>> 
>>> Spencer Yost 
>>> 
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