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#1
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Beginning To Rethink the Idea of 2 Stroke Oil as a Fuel Additive
Since I completed the swap of a 617 diesel into my 107, I've been running 2-stroke engine oil as a strategy for replacing the lubricity that has been lost since the advent of ULSD fuel. Since the injector pumps of 617 diesels were designed for the "high" sulfur diesel available at the time with the diesel fuel providing the lubrication of the injector pump internals, it seems prudent to at least restore the lubricity of fuel to the previous levels.
Two stroke engine oil seems like a good candidate for this function as it is designed to be added directly to fuel for the purpose of lubricating the engine. It is also low-ash and designed to be burned along with fuel. In the over 30k miles I've put on the engine I've seen no ill effects and the engine runs just fine, so I conclude that the 2-stroke oil is doing the job I intended it to do. Recently I switched to a product from what I believe to be a reputable company, which is specially designed to replace the lost lubricity in a potentially better way. This product is advertised to be run in a ratio where 1 qt treats 250 gallons or 1 oz for every 8 gallons. With 2-stroke oil I was running 1 oz per gallon (or 8 oz per 8 gallons).... so about 8 times as much. The wording on the bottle says treats "up to 250 gallons", so to be safe I've been running an easily remembered 2 oz for every 10 gallons (or 160 gallons per quart) A typical fillup is 15 gallons, so it's an easy 3 oz before filling. Since making the switch I've noticed two positive things
Obviously things like bio-diesel would be potentially better options to use as a lubricity additive, but we have almost no biodiesel available in this area. I've only run two tanks thus far, so experience is limited. Anyway, I'm not promoting this product, rather just sharing some recent experience, my current thinking and looking for other ideas that people are using to address the fuel challenges with our vehicles.
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#2
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I'm afraid this will be a food fight as oil threads in my other forums get ugly so I assume additive threads will .
I don't know enough to have an opinion on this subject. I use Diesel Kleen +Cetane Boost which claims lubricity additive is in there. Wouldn't know if it's good enough or not, I just read about it in several posts and took it on faith. I've got so many two-stroke toys that it would almost be easier to use two-stroke and keep one less thing in stock. I'll pop some corn and watch the more experienced diesel folks opine.
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Eric, CPO, Submarines, retired. Here's a sig line... Mine: '68 Corvette LS1/4L65E, 83 240D, 2000 GMC 4x4, 08 FLSTC Anniv Hers: '72 Corvette 454/4spd, '99 MB SLK, '93 Metro vert, 78 240D, '92 Silverado, '65 Fjord Rustang, '59 Fjord Fairlane, '17 Slingshot. |
#3
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Let's hope that things can stay civil and factual and not devolve... I've used this product in threads to kill off unwanted debate on air filters with excellent results.
I guess if things get really out of hand, I can whip up a batch of "Additive Debate Repellant" to deal with that here.
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#4
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I've been using 2-stroke oil on and off (I use cetane boost as well) and have noticed at this high altitude in central New Mexico (I'm visiting family) I blow less smoke than using just cetane boost and far less than straight diesel. I think they switched over to winter diesel already and this stuff burns awfully. Phil Forrest
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1972 220D "Trudy," named by a friend. "The 220D sounds good... I suspect it is the only car that you need a calendar for, rather than a stopwatch, when doing acceleration tests." Tom Abrahamsson |
#5
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All over
This has been discussed here many times. It doesn't hurt anything. Likely
does lube the pump. Doesn't seem necessary according to most. I used it for a while when I first got the car but after reading here for a while I figured it was something I could live without. There was one I read about called Opti-Lube ( don't quote me on that ) that really did do a great deal but it was a bit expensive. Most folks here with high mileage cars got there with no additives.
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85 300TD FED-Daily 84 300SD-Wife's 86 XJS-Sunday 66 GMC-Work- Given to my stepson 83 BMW Airhead- Given to my stepson |
#6
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When life gives you lemmings... make lemmingade. |
#7
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One ounce per gallon ? I use only twice that much on my two stroke equipment. Keep in mind also that the MB is equipped with a premium oil-lubricated injection pump working at relatively low pressure, so all the changes in fuel over the years doesn't seem to bother it as it did to the cheaper fuel-lubricated pumps.
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'83 300D, 126K miles. |
#8
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#9
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Vegetable oil has excellent lubricity.
Put on a flame suit, debate repellent is not strong enough for this baby!
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Cheers! Scott McPhee 1987 300D |
#10
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Over on a 6.5 GM forum there is apparently a long thread with comparative tests of various lubricity additives. I haven't waded thru it myself but I'm pretty sure the conclusion was that there's nothing better than 2 cycle oil. I use it in my 6.5 but don't use it in my TD.
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1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13 |
#11
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Quote:
Well, if that's correct, and I have no reason to doubt the methodology or the results, it looks like I've inadvertently made matters worse not better. Quote:
Quote:
Thanks for all the ideas and information.
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#12
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I have run virtually no additives in any of my diesels for 120k+ miles. How do they run? Great! My 300SD has 321k on it, original engine, original pump. Runs fine. No additives. None of my dads run additives either. I occassionally run fuel system cleaner in my gasser, but thats it, and not often....
Running stuff like 2 stroke oil is doing nothing but polluting the air 3x as much. Just the fact "oily residue on rear of car" was mentioned is gross!
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#13
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I dump one container of 32:1 size 2 stroke oil in my tank when I fill it. The 32:1 is 4oz and the tank on a 190D is 14 gallons. I don't have any oily residue and the glowplugs came out clean when I changed them. They weren't fuzzy with carbon.
I just think you're using too much oil.
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'84 190D 2.2 5MT (Red/Palomino) Current car. Love it! '85 190D 2.2 Auto *Cali* (Blue/Blue) *sold* http://badges.fuelly.com/images/sig-us/302601.png http://i959.photobucket.com/albums/a...0/sideview.png |
#14
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The test was 2007....time for a new test as I'd expect some of the players to have upped their game.
Test of multiple two stroke oils would have been nice. They used TCW3 conventional. Would like to see a full synthetic and a castor oil based test. Honestly though once my power kleen is used up I'll just go the two stroke though, it's cheap and easy and looks to fill the need nicely.
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Eric, CPO, Submarines, retired. Here's a sig line... Mine: '68 Corvette LS1/4L65E, 83 240D, 2000 GMC 4x4, 08 FLSTC Anniv Hers: '72 Corvette 454/4spd, '99 MB SLK, '93 Metro vert, 78 240D, '92 Silverado, '65 Fjord Rustang, '59 Fjord Fairlane, '17 Slingshot. |
#15
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i like the blue smoke. if i wanted clear smoke, i would get a gasser.
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Ben 1987 190d 2.5Turbo |
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