I use a 1oz/1gal ratio. So a 32 oz container is perfect for our trucks.

Before use - Normal engine noise, around 13.75 hand calculated, No smoke

After use - Engine noise under 2000 RPMS is MUCH less. Even my mother noticed it (who is oblivious to pretty much everything to do with my truck). Mileage is still up for grabs - still got around 3/4 tank. i will report back. There is NO SMOKE at all - it burns pretty clean i guess. So far this has been a positie experiance - much more then PS DK

INTERESTING FACT - If you read MOPAR GUYS page it states that - "Cetane booster tend to reduce the BTU's of the fuel causing a reduction in MPG. Most people start reporting loss in MPG's cause by the 2 Cycle Oil. Actually it the cetane booster. Every winter when cetane level are high (>45 Cetane) most people report a loss of 2-3 MPG. There is cetane booster in the winterized fuels. So cetane booster will degrade the performance of the 2 Cycle Oil as well. "

I was always under the impression that cetane actually improves mileage - guess not.

This page clears up ALOT of myths about lube, fuel, and injector lube - http://mopar.mopar1973man.com/2002%2...ilure_faqs.htm

 

I also use the 2 stoke oil, for about 1 year now. I did not notice any smoke. What I noticed is, a smoother working engine and way quieter than before. I've heard that really help to lubricate the injector's. Good luck.

 

[QUOTE=randomhero1172]
INTERESTING FACT - If you read MOPAR GUYS page it states that - "Cetane booster tend to reduce the BTU's of the fuel causing a reduction in MPG. Most people start reporting loss in MPG's cause by the 2 Cycle Oil. Actually it the cetane booster. Every winter when cetane level are high (>45 Cetane) most people report a loss of 2-3 MPG. There is cetane booster in the winterized fuels. So cetane booster will degrade the performance of the 2 Cycle Oil as well. "

I was always under the impression that cetane actually improves mileage - guess not.

[/QUOTE]


This is the only issue I have with Mopar Guys post, that cetane reduced MPG. The 2 cycle oil does improve lubrication but it is designed for a gas 2-cycle motor and not diesel. The additives for gas are different than for diesel. Here is a good explanation of cetane:

"Cetane number is a measurement of the combustion quality of diesel fuel during compression ignition. It is a significant expression of diesel fuel quality among a number of other measurements that determine overall diesel fuel quality. Cetane number of a fuel is defined as the percentage by volume of normal cetane in a mixture of normal cetane and alpha-methyl naphthalene which has the same ignition characteristics (ignition delay) as the test fuel when combustion is carried out in a standard engine under specified operating conditions.

Cetane number is actually a measure of a fuel's ignition delay; the time period between the start of injection and start of combustion (ignition) of the fuel. In a particular diesel engine, higher cetane fuels will have shorter ignition delay periods than lower cetane fuels.

Generally, diesel engines run well with a CN from 40 to 55. Fuels with higher cetane number which have shorter ignition delays provide more time for the fuel combustion process to be completed. Hence, higher speed diesels operate more effectively with higher cetane number fuels. There is no performance or emission advantage when the CN is raised past approximately 55; after this point, the fuel's performance hits a plateau. In North America, diesel at the pump can be found in two CN ranges: 40-46 for regular diesel, and 45-50 for premium. Premium diesel may have additives to improve CN and lubricity, detergents to clean the fuel injectors and minimize carbon deposits, water dispersants, and other additives depending on geographical and seasonal needs.

In Europe, diesel cetane numbers were set at a minimum of 49 in 1994 and 51 in 2000."



Last point - Ever see the deposits left on the internal engine components of a 2-stroke motor?

 

If you are still using it after a year and your engine runs smoother and quieter then I am going to go to Wally World tomorrow and see if they have some Super Tech ashless 2-sroke oil and give it a try. Thanks for your post.

 

A quick search on the internet contradicts that cetane reduces MPG. The Europeans require 51 cetane in there diesel fuel and we know how much more they pay for fuel....

 

Rich,

This is a very valid point. But a quart added to 32 gallons is a ratio of 128:1. This is at least a 20 times lower ratio than that used in 2 stroke motors. The deposits would be further diminished using an ashless 2 stroke oil. JMHO.

 

I forgot to tell you guys that ,I also use the "Diesel Kleen". The increase in power is amazing, and I do not believe that decrease fuel mileage like some DODGE guys are saying.
Take care.

 

HINT for those of you looking for the ashless oil, its not always gonna say ashless in big letters across the front of the bottle, dont worry! look for the letters TCW-3, it means its ashless

 

Thanks for the advice Nic. I would have never known.

 

I understand your thinking on this point Robin, my big hang up is on the issue that cetane reduces power.

 

Will the addition of 2 stroke oil lower the cetane rating?

 

Couple points here. Being in the snowmobile business for over 20 years, I can see some concerns about deposits. The thing is 2-stroke engine builders set up there oil delivery systems way richer than they need to be (for warranty reasons), sometimes as low as 24:1. This being coupled by the fact that many 2-strokes don't run as hot as our trucks, in fact I have built and run many mod 2-stroke snowmobiles over the years, all with digital water temp gauges on them. Most of the time they are in the 120-140 degree operating temp. range. Couple that with a rich mixture and deposits will form. Now we have tested leaner mixtures, all the way up past 100:1, and the results were cleaner, better running 2-strokes with alot less deposits. The oils are just so good nowdays (most of them) that they can be run at a lot leaner mixtures than years ago. How does this relate to our trucks?
Being they run hotter, and the mixture will be approx 133:1 (at 1 oz per gallon), deposits should not be a problem. Also, with the lubrication capabilities of today's oils I see this as nothing but a true positive in terms of injector and pump life.
Although I have not tried it yet, my next fill up will get a dose of 2-stroke oil, especially after reading the chart and finding out the Diesel Kleen (white bottle) I add to every tank is not doing a whole lot for me in terms of lubrication. I will keep you posted on the findings.

 

Excellent post Highmark18,

I'm curious on your thoughts about:

1) The difference in additives between diesel fuel & gas. Can this be an issue with running 2-stroke oil in the 7.3L

2) Even though the leaner mixture of 133:1 will result in less deposits than than a lower ratio, do you think it can still be an issue since injectors are less forgiving when it comes to deposits and other contaminants?

No argument about the added lubricity, just trying to find out as much info as possible since injectors are not cheap and according to the report you can use some of the other additives listed in the top 9 and get excellent lubrication along with additional benefits such as detergents, cetane improver, etc, at a lower cost per tank. I know the report shows the 2-stoke oil as being $1.09 per 25 gallon tankful, but this was at a 200:1 ratio, so a 133:1 ration will be closer to $2 a gallon.

 

It'll cost a bit but the smell is pure sex!

 

Power? You mean mileage right?

But i agree with your findings Buffalo! I always thought cetane was a rating of fuel quality - Similar to OCTANE. Take a look at MOPAR guys site and you will see that the flashpoints between diesel fuel and 2 cycle oil are very close.

BUFFALO - READ THIS http://mopar.mopar1973man.com/2002%2...l/btus/btu.htm

^^ I dont understand how that can be? Im with you on this, but he makes a valid argument. I just dont see how there can be this huge misconception about cetane rating. Read the story on the bottom of the page as well

The only concern i see is the ash and deposits. Becuase yes, my chainsaws, weed wackers, etc run pretty nasty. Even if it is only for two uses or so - these same results of dirty ashy residue may occur within 100 uses in my truck. I think its a safe bet to use ashless 2 cycle oil - This would put my mind at ease.

So - 2 cycle as very similar flash point and BTU. It is extremely similar to Diesel fuel, and has great viscosity. If switching to ashless - then i dont see many more problems.