I mean this in the nicest way possible, you'll have to use the search button. Get comfy, and be prepared to do some reading. This is a very informative site that has very little, if any of the BS that ruins lots of boards. Welcome and enjoy the site.

 

have 03 , 2 injectors under warenty but in allmost 8 years has been great truck no major problems. but i do matinance big time oil every 4k fuel every 8k or sooner, get water and trash new filters. keep coolant flushed and filter install. be good to your truck and it will be good to you

 

+1 for the 2 stroke oil
clogging is not going to happen, stiction and wear will happen and thats what you want to prevent.proper filtration keep the nozzles from clogging on a diesel.
that is the recommended dosage, and i cant seem to find it in my personal archives of crap but i have a fuel additive lubricity test performed by a 3rd party tester using the HFFR test. they tested about 20 fuel additives at their rec'd dosage, as well as marvel mystery oil, tcw-3 2-stroke oil @ 1 oz/gal, and biodiesel. shockingly most of the additives scored less on the test than straight diesel, and of the few that actually provided better lubrication they broke it down for "cost per gallon" for each additive. 2-stroke oil won by a landslide. opti-lube was very good as well. biodiesel was best hffr score, but costs way too much. i will try to find it, i think it may be on the virus computer i have sitting here holding all sorts of random tests, pictures, and info hostage.

slight hijack.....

i havent proven this theory of mine, but i think 2 stroke oil has some fuel stabilizing properties to it. i have proven it prevents my heavily oxygenated race fuel from gelling (VP U4.2 ) and it doesnt take much at all, 2 oz for 2 gallons. i use this method instead of draining the fuel completely out of the carb and fuel line and refill with non oxygenated fuel. i would bet the 2-stroke oil has some anti gelling/algaecide like properties when applied to diesel. maybe not, but my 7.3 liked it last winter.

 

Interesting - thank you.

 

The lubricity study data your referring to used a ratio of 1 oz. of 2 stroke oil to 200 oz. of diesel. I have been using the 2 stroke oil for 35,000 miles now at a ratio of 1 oz. to 1 gal. of fuel along with Motorcraft cetane booster. I read somewhere that 2 stroke oil has a cetane rating of 23, also read that the lubricity study test was doctored up with incorrect information because Opti-Lube formula was not the over the counter mixture. This is the link to the lubricity test http://www.johnfjensen.com/Diesel_fu...itive_test.pdf

 

I use a Cetane booster in every tank. Simply because the fuel in this country has a lower Cetane rating than the design criteria for our engine. Our fuel in CA is about as good as you can get, but I boost it anyway. Some of you Southerners really get the poor fuel.

I don't understand the concern over lubricity in our 6.0 engines. We don't have injector pumps, and it isn't going to matter in the injectors either. So I can accept that 2 stroke oil doesn't do any harm, but I don't think it offers any benefit. Stiction doesn't happen on the fuel side of the injector.

 

friction/stiction/scoring is absolutely an issue in the injectors! the lubrication helps keep the injectors functioning properly.

 

Stiction is NOT an issue in the FUEL side of the injector. The part of the injector that "sticks" is the spool valve. It is in the oil side of the injector.

 

My thoughts exactly! That's why we use synthetic oil, or oil treatments, when stiction is a concern.

There are no major moving parts in a 6.0 that are wetted with fuel. Unless you count the fuel lift pump.

 

The lower half of the plunger in the injector might be lubricated by the fuel. That's the only thing I can think.

I tried the 2-stroke oil and even though many people said it was quieter, I did not notice it.

I'm using Opti-Lube XPD right now, because I bought 2 gallons awhile ago and the stuff really lasts. But I'm more interested in the cetane boost, the anti-gel, the water seperation, etc.

When the Opti-Lube runs out, I'll either get more of it, go back to Stanadyne, or go to the Motorcraft PM-22 product. I'm leaning toward the PM-22 right now.

 

that may be the COMMON issue with these injectors, but there are fuel bath moving parts that can seize or score, and need some form of lubrication. this is a huge problem with construction company trucks running crappy fuel diluted with a lot of alcohol to get rid of rain in outside kept fuel tanks. on the CAT side it was called the needle, but plunger works as well.....and if that sticks you are going to dump fuel constant as well as pump combustion into the fuel system or not inject enough if any at all. this is also a problem for trucks that have been filled up with gasoline and run for a while, the needles get scored from 0 lubrication and there is no bringing them back.

my experience is much more with the CAT engines, but the C7 injectors are the same(design, not nozzle and flow) as the 6.0 just like the older 3126 had the 7.3 style injectors.

like i said, i cant prove anything that 2 stroke oil does for diesel. i can prove what it can do to keep my race machine from seizing up with the oxygenated fuel in it, as well as its anti gelling properties in the race fuel. its cheap, and it doesnt hurt even if it doesnt help. i do recognize that plenty of people get along fine without it.

 

i got a new cap but because of pressure coolant keeps comming out not a lot just a little. does that mean the egr cooler is going bad???

 

Maybe. In order of expense to repair, it could be:

Overfilled degas bottle (lines on the bottle are incorrect)
Another bad cap
bad degas bottle
bad EGR cooler AND oil cooler
failing head gaskets.