simply adding 1 oz. of 2 stroke oil to every gallon of fuel has reported 2+mpg increase and a quieter running motor.
here's the link:
http://www.thedieselgarage.com/forums/showthread.php?t=36024
and another:
http://www.thedieselgarage.com/forums/showthread.php?t=41906

and another:
http://www.thedieselgarage.com/forums/showthread.php?t=39543  

You know, there is no way that 1oz. of anything will give you 2+ MPG or a quieter motor. Its not possible. It's snake oil, just like all other engine additives.

Think about it... in a 30 gallon tank of Diesel you are running a 1:3840 mix ratio of 2 Stroke Oil to Diesel.

It's all mental, just like every other gimmick out there. I can tell you that pouring a can of Pepsi in my tank increased mileage 10% and super models won't leave my truck alone, but that doesn't make it true...

Anyway, I think we should do another Diesel Myths article and debunk this one... Trevor David Jason you guys listening?  

i said 1oz to every gallon, so if you had a 38 gallon tank you would add 38oz. the guy who did this compiled a ton of research, he was upset that the fuel companies were stripping all the sulfur out of the fuel and was looking for a way to add back lubricity to the fuel, the added MPG and quieter characteristics of the motor were just an added bonus. he didn't just throw it up on the internet as some hoax. thats why i included the links, it's worth reading.  

it is not worth your money the best oil on the market is the stihl high performance oil and the more expensive stihl ultra performance synthetic oil for six one gallon of stihl hp is six dollars and the stihl synthetic is about ten dollars.  

I've heard of people adding 2 cycle oil, ATF and even used motor oil to the fuel to quiet things down, especially in over the road trucks. But I have also been told use of heavy oils like these in the newer common rail fuel systems can cause BIG problems, especially with the injectors. User beware!

As far as gaining 2+ MPG using additives, I have seen a solid 2 mpg gain in my Cummins using PowerService DieselClean in the grey bottle. Granted, it's the first additive I've used that I have actually seen a differance in anything over plain fuel, diesel or gas. I use it extensivly while traveling and I can tell you honestly that PS can take the crappiest-running fuel and turn it into something special. Just my $.02.  

alright add that cheap ol 2-stroke oil to your truck and cry when your motor is clogged with carbon build-up don't believe me go to your nearest stihl dealer and ask them for the report on the 2-cycle oils and I bet a million dollars they will say Stihl high performance ultra fully synthetic 2-cycle engine oil is the best on the market(or mabye the cheap oil clogges the valves a little which helps add the mileage)

DP Web Editor if yall do an artice on this please use this type of oil  

i know its a little off the subjet but diesel motors will run on oil i have a 2004nhalf cummins and ran it on filterd motor oil at a 50% mix i got 2-3 miles per gallon better because of the higher btus of the oil and had more power until i lost the transfer pump i got the new upgrade from dodge ive been told from some people that the fuel didnt cause it the pumps were badmy mom and dad have a 1997 passet tdi it runs it fine and a 2001 jetta tdi it runs it fine and gets 60mpg on the hwy just thought i would see what you all think  

As I stated above. Be careful running heavy oils (motor oil, 2 cycle, etc.) through a common rail fuel system. Remember, these stsyems produce 24,000+ psi of fuel pressure at the injectors. The heavy oils have been traced to accelerated injector erosion and possable pump componet wear when mixed in the fuel of HPCR diesel engines. The stock injectors on a CR Cummins will run you $500.00 a piece at the Dodge Garage. You don't even want to know how much a new CP3 injection pump will lighten your wallet. Just my $.02  

thats why i dont run it any more but i saw where some one said cummins said you can run a 5% mix. would you be able to run it in the old mech. inj. cummins  

In my opinion and olny my  2 cents I believe in power service additive. Handy to get ahold of and it does the job... and it  a proven thing...Bill  

PowerService is your friend!  

I tried everything on my 95' 6.5 nothing helped i was just about to have all my injectors rebuilt then i tried an additive called Megatane it was the only thing that smoothed my engine down cleaned my smoke and added about 1.5 to 2 mpg 10.00 a bottle and treats 100 gallons (4 fill ups )  

I use the power service diesel clean. It is $15 for a 96oz bottle at wal-mart. You can get 6 fill ups out of the bottle and it makes a huge difference. Better mileage, cleaner exhaust, better performance. The ford mechanic said that most diesel fuel is running around 40 cetane and that today's trucks need around 46 to perform correctly. I'm new to diesels so I'm not sure if that is accurate, but the PSD beats fords additive at $8/per 20oz bottle.  

I've only put about 4,000 miles on my truck since I've had it (about 2 months) Ever since the first fill-up I used Howe's treatment and once I learned how to drive the 6-speed and quite hot-rodding it around I averaged about 15.8 MPG. About 6 tanks back or so I switched to using 1 oz of 2-stroke oil to 1 gallon of diesel fuel. I have been using Mag1 just because it is locally available and relatively cheap. Ever since I have added it I've seen an increase in my mileage of about 1 MPG. I average about 16.7-16.9 now. I haven't sat down and tallied everything up to see if running the 2-stroke oil is actually cost-effective from a mileage standpoint. However I started using additives from lubricity concerns rather than mileage concerns. I have not noticed a quieter running engine but I don't really care about that and I'm half deaf anyways.

So yes using the oil increased my mileage but I also have to pay extra for it. But I sleep better now that I don't have to worry about my VP dieing from lack of lubrication.  

Guys that don't believe it...including the editor...  

The research has been done on this subject.  People from across the country have tried it.  As I recall this thread: http://www.cumminsforum.com/forum/alternative-fuels-additives-oils-lubricants/4054-first-time-w-2stroke-oil.html
Went into the details of how and why with the chemical reactions as well as the laymens terms of how and why.  The thread is 101 pages long...so be ready to sit and read for a while.

Don't believe it Editor?  Try it before you doubt it.  Give it an honest shot and you'll be a believer too.  Heck, you have access to all the fun stuff....Read that thread and get the ratios right (or call Chuck at Twin Port Sales www.twinportsales.com) and strap a truck on the Dyno.  Set the Cruise at 70mph and see what you find.  Run 1/2 tank and try it again with the mixture.  

There are probably at least a thousand if not more, people doing this now, and I haven't heard one negitive thing.

Sure it sounds far fetched, but think about this....2 stroke oil is designed to burn, be ashless and leave little to no carbon deposits.  It's lubricity is also very high, which helps ALL the injection pumps.  I've even started to hear of P7100 pump failures due to poor fuel lubricity.