PTFE

[DavoNF]

TsLeng,

Well if the sump only holds 850mls, I would go for the very best oil money can buy, the creme de la creme of motor oils

Dave

 

[TsLeng]

quote:

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Originally posted by DavoNF:
TsLeng,

Well if the sump only holds 850mls, I would go for the very best oil money can buy, the creme de la creme of motor oils

Dave

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I thought of that before but it doesn't make sense cause my moped doesn't have an oil filter.

So all the junk produced will be in the oil, so no point using Mobil 1. I rather just use dino or semi-syn and change frequently.

 

[DavoNF]

Oil filter or no, you have a high reving engine in a hot climate, the ideal scene for a good synthetic oil.

Your sump holds under 1 litre, so cost can't be a consideration. If you are worrying about deposits, just change it out at the same interval as you did the other oil.

Dave

 

[TsLeng]

Yeah, you're right, its very revvy, maks hp at 8000rpm. I shift at redline everyday(its my daily transport) and cruise near top speed.

 

[TsLeng]

And, about the cruising near top speed thing, my moped can only go like maks 85km/h.

 

[DavoNF]

I also own a small bore Honda motorbike (185cc). I was just checking the owner's manual and Honda recommend a 20W-50 multigrade for temperatures -(minus)10 to +40 degrees C, which would suit your climate.


cheers
Dave

[ October 16, 2003, 03:32 PM: Message edited by: DavoNF ]

 

[TsLeng]

Haha, mine is even smaller, only 100cc.

 

[shifty]

20+ years using Slick50 in a dozen cars we've owned, 4 of them over 300,000 km. Haven't lost an engine yet. One car used Slick50 from 80,000km to 350,000 km. I can't say it helps but I am convinced it doesn't hurt. None of my cars has left because of engine problems. Just throwing my experience on the pile.

 

[Road Rage]

I searched my lube library (I am an ME and was a tribologist, currently IT Director for R&D at a Fortune 8 company). Here is what i found:

1) A US Army study of Slick-50 that found it did not do what it said, and actually increased wear in the cam lobes. It indicated the product should not be used in any internal combustion engines in the Army motor pool.

2) PTFE breaks down at high temps
3) PTFE can migrate under heat and pressure
4) PTFE is an effective dry lubricant and that is where it is best used, such as in space equipment and open gears/rollers
5) When burnt, it forms a corrosive and toxic product.
6) It is chemically inert and resists oil - why would you want that in most areas of an engine? It can be used on piston skirts, con rods, and rocker springs because it resists the accumulation of oil, which in a racing car has benefits, much along the lines of a windage tray.
7) There are no scientific studies I have seen that indicate PTFE colloids will "plate" anything - PTFE plating for the arm of the Space Shuttle is done in a clean-room environment.
8) Moly has a much higher film strength - PTFE does not.
9) I found a gear company that makes a big deal about applying a PTFE coating to its ring and pinion gears. This makes no sense, esp. since the EP addtives in GL-5 gear oils are designed to work on and into the metal, and the OTFE would interfere with that process, leaving only the PTFe trying to cope with high loads - it cannot.

etc, etc,

 

[MolaKule]

Do a search in this thread for "PTFE"

quote:

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And Dr. F.G. Reick, who first patented the colloidal dispersion of PTFE (Pat. 4,224,173), never did prove that his dispersion of PTFE bonded to metal and if so, how it did not shear from metal, supposing it ever did bond to it.

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quote:

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It is also surmized that at localized hot spots the tetrafluoroethane decomposes such that the fluorine exudes from the particle and sticks to metal causing localized pitting.

Did I mention that it makes a descent grease thickener????

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quote:

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What does Teflon do under EP conditions???

It shears like crazy.

The only advantage to using PTFE's in gear boxes is that it reduces gear noise because of it's sound absorbing properties.

It is also a descent a Grease thickener. As a lubricant, forget it!

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[Mystic]

I just can't see using any PTFE containing product. I am not an oil expert but most of the companies that have sold these PTFE containing products and other products that are supposed to do the same thing with different stuff have been fined by the FTC.

I can think of one PTFE containing product that seemed to have very convincing evidence and was even written up in a national magazine. A long time ago I used this product. I probably would have been better off and saved money if I had put 20W-50 regular oil in my used Toyota Corolla in the summertime.

I have pretty much lost interest in all of these 'wonder' oil supplements and engine treatments. I used to be curious every time something new came out. But most stuff that comes out is disproved later on.

The one product I am confident does work is Auto-RX. Use this product and a good quality conventional or synthetic oil and you will be far ahead (and have more money) then the guys using all kinds of concoctions and trying to pretend they have PhDs in chemistry.

 

[TallPaul]

quote:

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Originally posted by TsLeng:

First post here.

Anyway, I just want to know that can I use PTFE in my honda moped? Its a single cylinder, air-cooled and the oil also lubricates the rotary 4-speed gearbox.

Also, it doesn't have an oil filter. I assume the clogging issue will not be a problem because of this.

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I find the teflon thing pretty scary. Why do you want to run it in the moped? I would think a good motorcycle oil would be best.

 

[dropitby]

If lawsuits are not enough then the maker of the product may convince you.

DuPont's Fluoropolymers Division Product Specialist, J.F. Imbalzano said, "Teflon is not useful as an ingredient in oil additives or oils used for internal combustion engines." At the time, DuPont threatened legal action against anyone who used the name "Teflon" on any oil product destined for use in an internal combustion engine, and refused to sell its PTFE powders to any one who intended to use them for such purposes.

 

[salsahh]

Yeah The people at dupont confirmed that on national tv in fact its not just bad for oil but its actually going to become a erin Brockovich case its harmful for cooking and animals and people. people that work at the plant are getting sick and having reproductive problems I know this has nothing to do with a engine but this product is bad all around.

Now check this out this will make you really scratch your head.
http://www.xcelplus.com/xcelplus_slick_lubrilon.htm

This is the most ridiculos story i've ever heard even if it is true bottomline is they're still selling slick 50.

Now this is only an opinion but the way they talk about their competitors makes me sick to my stomach its not right and I hope some of their competitors read this and sue them for defermation of character.

 

[Robbie Alexander]

Originally posted by salsahh:
[QB] /-*-*-/. people that work at the plant are getting sick and having reproductive problems I know this has nothing to do with a engine but this product is bad all around.
/*-*-*-/ Don't agree. I have had some success with it, and although it is true that in MOST cases is is not a good idea, it is in some cases a BENEFIT... albeit not COST effective, but a benefit in some cases- sometimes.
I have used it several times with no back-lash...
I wouldn't just pick anything off the shelf at the autoparts store either, most are snakeoil....
But there are a few that work!