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Old 03-26-2013, 07:49 PM   #241
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Believe me Marin, It's less. I'm not the only one who has said that too. Other owners who changed said the same thing.
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Old 03-26-2013, 07:55 PM   #242
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Mike,
The properties that make a good cutting oil aren't necessarily the properties that make a good lube oil. I worked in a "Job Shop" (large) and half the machinists wouldn't go out on a field job w/o Marvel Mystery Oil. There are places that synthetic oil performs noticeably better than dino. Do you have after coolers on that Cummins?

Ya can't go wrong w Dello. I've gotten in the habbit of running Dello because it's the only oil that's universally available in Alaska. You can get Jabsco pump impellers and Dello regularly or often in grocery stores. And most of the commercial ventures I've been on had the stuff everywhere. I was going to use Shell Rotella but .....
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Old 03-26-2013, 08:01 PM   #243
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Capnhead,
Marin's right it makes no sense ... it's a product of the fuel. But what if the compression was better w syn oil when cold? More complete combustion would tend to get the fuel burned and that would result in less sheen. I'm not say'in the compression will be better w syn oil ..... but if it was ?
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Old 03-26-2013, 08:09 PM   #244
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I own half of a CNC machining shop. We make hundreds of parts for military aircraft a month...................

So we did. Parts made on our machines are done almost totally submerged. It didn’t take long to realize the tools were running cooler and lasting longer on those two machines than on the other 3. The finish on the parts was also better.

I don’t even change my own oil - I leave that to the mechanics.

What do I use in my Cummins 6bt? Delo because that’s what the installing dealer recommends.

Mike
Sounds like my story. I started out as an apprentice in my brothers tool & die shop. We made injection molds for the medical industry. Did a lot of EDM work. (Also completely submerged in oil.)

I don't change my own oil either and my guy uses Delo. (That's about to change as I'm switching to synthetic. )
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Old 03-26-2013, 08:11 PM   #245
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Believe me Marin, It's less. I'm not the only one who has said that too. Other owners who changed said the same thing.
Maybe your observation coincided with warmer weather. But trust me, it ain't oil you're seeing back there unless your engine has a major problem and is blowing a bunch of oil out the exhaust in which case you would have a major smoke issue going on and continuing to go on after startup.

Assuming your engine is functioning properly I don't see how the difference between the correct grade of synthetic oil and the correct grade of conventional oil could have any effect whatsoever on the burn efficiency in the combustion chamber. What you're seeing on the water is unburned fuel from the too-cool combustion chambers after a cold startup.

My guess is that when you have observed this "reduced" fuel sheen behind your boat it had to do with water or wind or ambient temperature conditions on that day, not the kind of lube oil in the engine. Some days the sheen behind our two Lehmans after a cold startup is quite obvious, sometimes not so much, and sometimes we don't really see it at all. Depends on the variables I mentioned above.
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Old 03-26-2013, 09:20 PM   #246
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Marin is right. The sheen is fuel. To tie this into the discussion, consider where else that fuel went. Where? It bypassed your cold rings and went into your crankcase, where it is now oxidizing, diluting, and acidifying your oil. Synthetics be damned, because it is now a function of your additive package. Good thing you change it regularly!
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Old 03-26-2013, 09:22 PM   #247
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Marin is right.
Oh gosh! Did I say that out loud?
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Old 03-26-2013, 11:13 PM   #248
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Oh gosh! Did I say that out loud?
No problem. We'll all pretend you didn't.
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Old 03-27-2013, 06:56 AM   #249
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I guess it wouldn't work on aluminum ?

I have a hard time thinking of oil as being magnetic.
Ron, it's not so much a magnet as positively charged oil molecules, which are then in turn attracted to the negatively charged engine metal, (the negative terminal of the batts are connected to the engine block, right), and then as friction and heat builds it becomes more negative, attracting the oil molecules that are positively charged to the metal surfaces even more strongly. Not all the oil has to be positively charged either, just a proportion, as they then link pos to neg forming chains. The effect is quite dramatic.

When Bitron sold a penetrating spray can like WD40, using this 'magnetic' principle, I decided to test it by useing it on the rather stiff sliding dors of my garden sheds, which had previously been sprayed often with WD40 and CRC, many times and they were still stiff, so it was a severe test.
I then forgot I had done this, not really expecting it to make the claimed difference, as I was fairly sceptical. A few days later I had occasion to go to that shed, and just used the usual fairly heavy amount of force to shove the doors back, and bugger me, they both shot to each end of their tracts so forcefully they slammed on the stops. I was sold on the idea from that day, and I used it in my vehicle until it was no longer available, killed off by Castrol adopting the science in their Magnatec, I suspect, because, as someone mentioned, they did not have it patented, because the patent lists the details of the science.
I now also use Magnatec Diesel in my L120 with no issues.
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Old 03-27-2013, 06:58 AM   #250
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half the machinists wouldn't go out on a field job w/o Marvel Mystery Oil.

MMO is #1 off road diesel ( red died & untaxed ) with oil of wintergreen to change the smell.
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Old 03-27-2013, 09:33 AM   #251
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This is getting funny. Now I'm told I don't know what I see and what I see isn't what I think.

It must be my Lying eyes....damn it!

I started boating in June of 1983. I was shown the proper steps by a seasoned boater on start up procedures and I have stuck with that ever since. After the engine fires up, I always go to the transom and watch the water. I watch the exhaust, I look at the flow, the color and it's not a glance. There is a lot to learn there. I have wet elbows, is the water flowing correctly. Is there rust or lack of flow. You get the picture.

I started this so I could talk to other synthetic users, not to convince anyone to use it. I get the picture. Nobody uses it and I am the lone wolf here.

Not a problem, I like this forum and I hope to find friends here.
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Old 03-27-2013, 09:39 AM   #252
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I never said the sheen was anything but fuel. I know the sheen is fuel. It can get there for many reasons and one of them is a lower compression causing an incomplete burn. That's why when the engine warns and the rings expand it lessens.
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Old 03-27-2013, 10:45 AM   #253
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Nobody uses it and I am the lone wolf here.

Not a problem, I like this forum and I hope to find friends here.
Not for long! One of the real joys I get out of boating is using my boat as a test bed for products that show promise. Synthetic oil is such a prodct and will be in SeaHorse by this time next year.
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Old 03-27-2013, 11:06 AM   #254
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"this time next year"?

Don't get in a rush Walt.
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Old 03-27-2013, 11:29 AM   #255
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"this time next year"?

Don't get in a rush Walt.
You know me, Eric! I love doing this stuff. The worst that can happen is I trash the engine and someone will get a gift boat that won't run!
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Old 03-27-2013, 12:01 PM   #256
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This is getting funny. Now I'm told I don't know what I see and what I see isn't what I think.

It must be my Lying eyes....damn it!

I started boating in June of 1983. I was shown the proper steps by a seasoned boater on start up procedures and I have stuck with that ever since. After the engine fires up, I always go to the transom and watch the water. I watch the exhaust, I look at the flow, the color and it's not a glance. There is a lot to learn there. I have wet elbows, is the water flowing correctly. Is there rust or lack of flow. You get the picture.

I started this so I could talk to other synthetic users, not to convince anyone to use it. I get the picture. Nobody uses it and I am the lone wolf here.

Not a problem, I like this forum and I hope to find friends here.
Capthead! - Don't get too pouty because of some TF posters pushing back at cha... you're a great guy to throw items around with... as well as a boater who likes to push the “product-test” envelope, so to say. Especially, keep posting your input and experiences... cause we all have important things to learn from one another... even if a few won’t admit to that! LOL

BTW: Before this thread I was in no way planning to try syn oil. Now, mostly because of you, I very likely will. Still trying to figure out just which engine I will try it in; and, still doing dino – vs - syn research while I get ready to do my syn oil lube test. I will post here if/when I begin to perform this test and I will also post on what I feel become the results. Heck, as you already are, I too might become a syn oil advocate – and, then again, I may not. Ya just never know, I gotta keep them options open! lol

There are some (four I especially notice – two you can’t miss – one who is blatantly obvious) TF contributors who like to push back hard and at times even rather insultingly... pretty much on/against any occurrence or concept they don’t understand or maybe haven’t experienced. Each to their own... I pretty much ignore their little posting tantrums and at times throw a curve back at em, just to get em riled up so I can then remain silent and watch their ongoing, fuming posted reactions. To me, that’s part of the excitement and fun inside TF. We all need thick skins. This globally open-to-anyone boating forum has developed into a fairly close knit society of numerous often posting marine aficionados who believe we (myself included) might be so smart as to actually be able to circumvent the laws of physics – only kidding, kinda! LMAO!!

Now that you’ve gone through some of TF’s most active contributors’ version of “Hell Night” on this thread – Whada Ya Really Feel Bout Trawler Forum?? Upbeat I hope!

Happy Boating Daze!
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Old 03-27-2013, 12:48 PM   #257
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I love it!! What can I say? It's like a family reunion where the cousins aunts and uncles come from afar and push all the buttons.

Don't worry, I have thick skin, well not on my arms anyway.
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Old 03-27-2013, 01:01 PM   #258
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I love it!! What can I say? It's like a family reunion where the cousins aunts and uncles come from afar and push all the buttons.

Don't worry, I have thick skin, well not on my arms anyway.
Yeah... I've heard where slippery syn oil thins arm skin first - lol
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Old 03-27-2013, 03:27 PM   #259
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Dratted thin skinned arms. So it's the synthetic oil, eh? Curses!!
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Old 03-27-2013, 03:39 PM   #260
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I never said the sheen was anything but fuel. I know the sheen is fuel. It can get there for many reasons and one of them is a lower compression causing an incomplete burn. That's why when the engine warns and the rings expand it lessens.
I think you will find that the engineers at Northern Light/Lugger will disagree with your lower compression theory behind the unburned fuel from an older diesel when it's cold. At least they did when they described the whole situation to me. But you'll have to take that up with them.

Personally, my money's on them.
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