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Fuels & Lubricants Discussion all about Fuels & Lubricants. synthetic oil, conventional oil, brands, change intervals, diesel grades, gelling and such debated items like that. Non TDI related postings will be moved or removed. This forum is NOT for the discussion of biodiesel and other alternative fuels.

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Old July 20th, 2012, 23:14   #1
Seatman
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Default 2 stroke oil in your diesel = smiles?

I've been hearing a lot about people adding 2 stroke oil to their diesel so figured I should see what I could find out and it's sounding like a good idea.

http://www.brick-yard.co.uk/forum/ad...opic37935.html


Are most of you guys already doing this?
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Old July 20th, 2012, 23:49   #2
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No, we are not doing it, our cars are not 2 stroke motors.
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Old July 21st, 2012, 01:14   #3
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Quote:
Originally Posted by Seatman View Post
I've been hearing a lot about people adding 2 stroke oil to their diesel so figured I should see what I could find out and it's sounding like a good idea.

http://www.brick-yard.co.uk/forum/ad...opic37935.html


Are most of you guys already doing this?
Overall (in the diesel world) it's not uncommon and has been done for many years.
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Old July 21st, 2012, 02:02   #4
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I do it in my 1996 5.9 Dodge Diesel pickup. One time I dumped in a gallon of used motor oil. Only thing that happened is I didn't need to srop it off at AutoZone that month. My mech. advised against the used stuff but for the New Beetle I use a commercial diesel additive and that is it with my #2 good stuff. I got 46 mpg on my last tank driving up to 80 at times when safe and gave up on any low rpm theory stuff.
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Old July 21st, 2012, 09:11   #5
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It's actually beneficial on pre 2007 Diesels that are not fitted with particulate filters. The only issue with adding extra lubricant to modern diesel fuel systems is that it is thought that it will prematurelly clog the particulate filter.

I add up to 1/2 gallon of mineral engine oil on every fillup on my old F250 6.9 IDI. Its good for the fuel injection pump,injectors and upper cyclinders. I also get a slight increase in power and better MPG.

I never add it to my 2011 TDI for the reason stated above plus I am still in warranty. Once Im out of warranty I may consider a couple of ounces per fillup.

Running 5% bio diesel is allowed under warranty and provides extra lubricity.
On my last service visit i asked to go into the shop and look at my fuel filter. The head mechanic in the shop told me that that out of all the TDI's he sees going through his shop mine had the best quality fuel he had seen and felt.

DO NOT EVER add used engine oil to diesel fuel. That is a death sentence system to any fuel injection system.
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Old July 21st, 2012, 09:21   #6
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The ONLY thing I add is: Zmax
Once a year it's a welcome refreshment
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Old July 21st, 2012, 09:23   #7
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Quote:
Originally Posted by pvapollo View Post
One time I dumped in a gallon of used motor oil.


Not a good idea
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Old July 21st, 2012, 09:24   #8
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I did this for a long time at HermTDI's recommendation. Its major benefit is to lubricate and quiet the rotary pump. I think it's a good idea. He cautioned me to be sure to use ashless oil to make sure it doesn't harm the CAT (such as it is). I've moved on to using biodiesel or Stanadyne, but I did run it in my M-B for a while. Wouldn't in the new car.
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Old July 21st, 2012, 09:30   #9
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Two cycle oil is generally added to diesel fuel as a lubricity additive. It does add lubricity, but not as much as many other additives. As far as I know, there is no harm in adding some 2 cycle oil to a tank *IF* you are driving an older (non-CR) TDI. The issue with 2 cycle oils is that very few (if any) are "Ultra Low Sulfur" oils. Therefore, they could foul the DPF and perhaps other emissions equipment in newer TDIs. Shortening the life of your very expensive exhaust system is something you don't want to do

Basically, two cycle oil does add some lubricity, but there are many other lubricity additives that are better (and many are just as cheap). Just be very careful if you add it to a new (2009+) TDI.

Have Fun!

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Old July 21st, 2012, 10:29   #10
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Quote:
Originally Posted by TDI smile View Post
The ONLY thing I add is: Zmax
Once a year it's a welcome refreshment
Pure Snakeoil.

http://www.lubereport.com/e_article0...ynqMH,a101R1PT

For any kind of fuel additive to even be effective, it has to be added to EVERY tank of fuel. All ZXAX does is makes your wallet lighter and from the report and lawsuit may even increase wear.

The best thing by far for fuel system lubricity for Diesel engines seems to be B2. See the test results on the forum the OP linked.

Using 2 stroke oil has no real data to support or reject it's usefulness in Diesel engines. I think I would like something more concrete than unsubstantiated observations.
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Old July 21st, 2012, 10:41   #11
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Ok so I added a tiny amount earlier when putting in fuel and have noticed the engine is considerably quieter. No difference in responsiveness and to soon to know about mpg's.

I'll keep an eye on things though, try with and without a few times and see if what turns up.

Mine is the ALH so it's old enough anyway.
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Old July 21st, 2012, 12:23   #12
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You still have a catalytic converter on your tdi, that you are destroying with 2 stroke motor oil.
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Old July 21st, 2012, 12:27   #13
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Quote:
Originally Posted by Ol'Rattler View Post
Using 2 stroke oil has no real data to support or reject it's usefulness in Diesel engines. I think I would like something more concrete than unsubstantiated observations.
Except perhaps this from the Spicer report
"Super Tech Outboard 2-cycle TC-W3 engine oil
Unconventional (Not ULSD compliant, may damage 2007 or newer systems)
HFRR 474, 162 micron improvement
200:1 ratio
16.64 oz/tank
$1.09/tank"

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Old July 21st, 2012, 12:52   #14
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Not really a cat, it's simply a particulate trap. And ashless 2 cycle oil causes it no harm. I do recall that there was data around here a few years ago that showed 2-cycle oil is pretty effective as a lubricant, but I agree that biodiesel is better.
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Old July 21st, 2012, 13:09   #15
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Indigo you have hit the nail on the head.3rd.party testing did dome work for the cummins guys and found that 100% bio is the best.cannot remember what came in second.third place went to TCW#3 2 stroke oil.It was actually oil from Wally World.
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