View Full Version : Molyslip?

Tuesday 22nd March 2005, 07:21
undefinedHi has anyone used the product MOLYSLIP i have been put on to it and am about to put it in my engine and transmission and would like some feedback if any of you dudes is a user :worthless cheers ste

Tuesday 22nd March 2005, 08:49
Never heard of it???


Tuesday 22nd March 2005, 15:20
It's an oil additive. Molibdanum sulphide? (MoS2) or something similar, supposed to reduce wear and improve performance and fuel consumption.

I don't know whether it's anymore effective than a decent snythetic oil tho?

Tuesday 22nd March 2005, 17:15
It's been around for years; haven't used it for years tho'. Molybdenum disulphide is an extremely slippery substance. I use Moly coated bullets when re-loading for my match rifle; reduces copper fouling in the barrel & means I can shoot 50 rounds before cleaning as opposed to 8-10. Molyslip is supposed to impregnate the gears, so reducing wear. I think I last used it over 30 years ago, when oil technology wasn't as good as it is now.
Cheers, Chris.

Tuesday 22nd March 2005, 23:42
:remybussi right guys this MOLYSLIP it is not for sale in the UK through retail outlets os its imported from CANADA it is a sort of SLick 50 but with a different content , not teflon which is plastic and dont last, it;s the moly M0 52 or something and it comes in two forms oil additive and gearbox additive.

I was weary but a mate who is a cab driver put me on to it and i have today put it in my LTI taxi with 251k on the clock as part of a service, i have also added the "G" fluid to the power steering box and diff as the directions state, i can't explain the difference already just sixty miles into the treatment,the engine is notably quiety and puffs less or no smoke on hard acceleration the gearbox does not feel any different yet but it was a warm day and in the cold mornings its a bit sticky from 1 to 2 so ill let you all know.

that said its going in the Volvo's next as they all hold over 100k and this stuff is supposed to fill imperfections in the piston shafts rings and aid the combustion by reducing friction as stated with the bullet man, ill keep you posted.
thanks for the advice everyone.

Wednesday 23rd March 2005, 00:42
Molyslip can be bought from most motor factors in the UK ! We run a 'dash' in the fuel of the race car when running in ! If you think you need it in your road car you are either being cautious or the engine has covered a massive mileage.
Verdict: Yep, does what it says on the tin.


andi t5
Thursday 24th March 2005, 19:31
hi mate ,avoid it just use a decent synthetic oil which will give all the protection you need

Wobbly Dave
Wednesday 20th April 2005, 11:33
I put a bottle (cost a tenner) in my last oil change. I have been very impressed with the results. Car runs smoother, starts better and runs better from cold. MPG is a little improved. It really has filled in the nooks and crannies in the tolerances - after 153K there are a few. I am using fully synthetic Valvoline oil. I can highly recommend it for the higher mileage cars. She uses less oil, though I still get some seepage down the valve stems into the cylinders overnight.

"Moly Slip" is the brand name. I have heard over the years bad things about SLICK 50 - so avoid that.

Wednesday 20th April 2005, 12:51
My dad says he used all the time in his Lotus Cortina and the Mini they used to rally. Reckons it great stuff (But he is "old")

andi t5
Wednesday 20th April 2005, 15:27
DONT PUT THIS IN YOUR ENGINE ITS CRAP why do people fall for this sort of bull££££ use a premium synthetic end of story

Wobbly Dave
Wednesday 20th April 2005, 16:15
It is not rubbish & I am using premium synthetic oil. I took this advice from who knows his petroleum products and was responsible partly for the development/creation of Optimax. I have experienced the difference first hand.

If you would like to qualify what you mean - I would be interested in any criticism of the product, including any negative experiences you have had with it.

I would not recommend anything that would damage anyones engine. I think the older engines would benefit.

Wednesday 20th April 2005, 16:31
I used to use this years ago when I was in the trade, a liberal coating on bearings/moving services before re assembley to prevent initial wear before the oil found its way around properly.
Excellent stuff,.
Am surprised people are saying its cr@p but not giving reasons..
It is not designed to be used in isolation, never was intended for that.. :slap:

Wobbly Dave
Wednesday 20th April 2005, 16:36
I have been told that modern oils already contain slip compounds - I am just increasing the concentration. I don't even think I would use it (or need to) every change - maybe every 2 or 3.

andi t5
Wednesday 20th April 2005, 19:45
its not required due to the standard of full synthetics which are of such a standard that magic potions are just not required ,forty years ago yes, now no, the only thing that you need to do to ensure mega miles from your engine is use good oil, original standard filters and change them often, claims that your engine will start better run smoother are ludicrous, think about it, your using a top spec low viscosity full synthetic say 5-40 weight, how can adding molybidium disulphide to it make starting easier or the engine to run smoother? total bull££££ im afraid it just doesnt happen no matter what your mates tell you spend your money on a top class oil and forget the witch doctor crap

Wednesday 20th April 2005, 19:59
Andi, i appreciate you have an opinion, but please watch your laguage mate.

I would think there is also no need to be as aggressive.

Thanks ;)

Wednesday 20th April 2005, 21:25
I have used the molyslip additive for the 5 speed gearbox in my m2 escort mexico.
The gearbox was completely knackered, the rear oil seal had gone closely followed by the the gearbox oil.
I added the molyslip simply to prolong the life of the gearbox until i could source another one.
The gearbox just got worse and sounded like a straight cut box, but no matter how hard i tried to kill it, it just hung on in there.
I think this was due to the additive.
Hope this will be of some use.

Wednesday 20th April 2005, 21:58
i put some in a mazda xedos 6 i had .didnt make a hoot of differance i agree with andy just use a synthetic oil and be done with it.

Wednesday 20th April 2005, 22:11
Well, here is my 2 pennys worth.

I tried all the additives in Halfords in my UNOs. Always after that little extra go. Slick 50 made no difference and molyslip was just the same. In the end I REALLY splashed out and put Halfords own fully synth in. Cars top speed went from 92 to over 100.

Did put slick 50 gearbox treatment in a sticky UNO box and there was a noticable difference. Smoother changes and quieter to boot.

I like the idea of an oil additive that helps smooth the rough edges. But if it does, why dont the oil guys mix it in as standard? Mobil think that their Synth oil is the best. Why dont they do a mobil Molysynth, charge another £10 and claim its the ultimate?

Magnatec is a sales gimic but a theoretical good idea. Funny you cant buy Castrol RS Slicksystem 3. Sounds good and would sell.

When Volvo put it in their engines from new and recomend it at oil changes, I will just think its a cushy deal between the two companies. When I try it and it makes a difference, I will use it every time. Made no difference to the UNOs so not going to bother.

Rant over :icon_soap

andi t5
Wednesday 20th April 2005, 22:11
sorrry mate i just tend to call a spade a bloody shovel no offence meant to anyone

Wednesday 20th April 2005, 23:19
i have not read this thread for a bit, the molyslip caused a bit of argee bargee here i see.

I have used the stuff that is imported from the canadian market and this contains 50 times as much molybendum than the uk stuff, now if anyone has used it in an engine with more miles than the one i used it in ill stand in woolies window and show my rear end, it went into my taxi, a 2.7 nissan diesel engine, diff, power steering and box, which was sticky cold, as i stated earlier, this has now improved a lot, not an imaginary tad but a lot.

I used to drive, say a mile happily crunching through 1st and second till optimum temp was reached now from ice cold two hundred yards up and down and its freely moving, thats no coincidence i assure you as i was saving for a new box when i decided to give this a go, as for the engine, i noticed little improvement as its serviced on the button using top oil, so maybe there are some truths in the oil thing.

thanks for the responses guys

Wobbly Dave
Wednesday 20th April 2005, 23:25
I am not using it in the gear box.

Wednesday 20th April 2005, 23:32
it a different compound specially designed for the box i should have said but it works for sure, you like my reversing?

Friday 22nd April 2005, 08:05
right here is the info i found on the MOLYSLIP, read, digest, decide and have a smoother ride!
In use, Molyslip products form a lubricating layer of Molybdenum Disulphide on metal surfaces in the following manner.

The Molybdenum Disulphide molecules arrange themselves into plates with a laminar structure in which eac h molybdenum atom is sandwiched between two sulphur atoms. The sulphur atoms are attracted to metal and therefore become plated or bonded on to each of the adjacent bearing surfaces. In between these two platings further layers of molecules form. The sulphur-to-metal bonding is very strong, but the sulphur-to-sulphur bonding between adjacent molecules is very weak.

Thus, there are two bearing surfaces, each protectively plated by a layer of Molybdenum Disulphide molecules with sliding or lubricating layers of molecules in between. In this way direct contact of metal-to-metal surfaces is prevented, friction is considerably reduced, with the consequent elimination of local heating, wear is inhibited and protection achieved even under extreme conditions of pressure and temperature.

The molecular thickness of Molybdenum Disulphide is such that there are approximately 40,000 lubricating or cleavage planes in an MoS2 film one thousandth of an inch thick!

The Molybdenum Disulphide plating is, in effect, a separating layer of immense strength, greater than the yield stress of most metals...and in addition it possesses the low coefficient of friction of ·03 to ·06 which gives more efficient lubrication combined with this greater protection.

PTFE treatments are only really effective for around 2500 to 3500 miles, and only coat the surface and will NOT restore worn parts, and since it is teflon it only coats. It WON'T actually bond with the metal, and will not last 50-80,000 miles NOTHING WILL! Not in an engine, not with the constant introduction of dirt, carbon and moisture.

Think of this way Teflon is a plastic (very durable plastic) but just a plastic. If you have Teflon cooking pans at home one scratch with a fork and eventually they peel off the protective coating. Your engine is all metal constantly rubbing together, that is why you need the oil. This is metal and bonds into the worn areas where dirt and carbon have made scratches, fills those voids and coats the other wear suffices to protect at start up.

It is widely used in Canada by pilots of small aircraft to lengthen ring life, also used in racing planes due to the high revving hot burning high octane aviation fuels. Very popular with race boat enthusiasts in America, but a best kept secret in the UK only used in the racing circuit. Unlike regular oils or PTFE it will not break down under heat or high stress conditions.


Friday 22nd April 2005, 08:44
Certainly sounds convincing! :anmflower

Wobbly Dave
Friday 22nd April 2005, 10:01
That is why I was saying about the suitability for the high milers, plus my own report following the introduction of 1/2 litre into my last oil change.

I thought the chemi lesson was very well done, so thanks for that. It reminded me of the nature of graphite. As the son of a retired chemistry/physics teacher it makes perfect sense to me.

Ultimately it is only my recommendation, but I would say the weight of evidence was on my side?

Saturday 23rd April 2005, 12:52
I was looking at Molyslip in the local motoring store today. It said that the gearbox version should only be used in Manual gearboxes....

andi t5
Saturday 23rd April 2005, 13:21
if you want the bottom line on oil additives go to the folowing site which has a very informative article on additives, www.fordscorpio.co.uk/snakeoil.htm if you canot be bothered reading the whole article(interesting as it) is read the last paragraph,conclusions, says it all really

rocket ron
Saturday 23rd April 2005, 13:58
cheers andi interesting link as you say, clears up a few misconceptions i had! think i wil stick to mobil 1 ony in future

Saturday 23rd April 2005, 16:45
that advice about the automatic box was well founded and the man from Halfords, certainly knows his stuff, because the friction is dramatically reduced by virtue of the fact that thats what this stuff does, it would interfere with the friction in the clutch of any auto box so manual boxes only for the treatment, however any engine can be treated.

Wobbly Dave
Sunday 24th April 2005, 00:15
Yes you should never use a slip compound in the AT. Manuals - the clutch is isolated from the box. In the AT the clutch packs are all part of the same box.

Wobbly Dave
Sunday 24th April 2005, 00:18
if you want the bottom line on oil additives go to the folowing site which has a very informative article on additives, www.fordscorpio.co.uk/snakeoil.htm if you canot be bothered reading the whole article(interesting as it) is read the last paragraph,conclusions, says it all really

Not once does this article mention anything about molybendium Disulphide.

Sunday 24th April 2005, 10:19
Not once does this article mention anything about molybendium Disulphide.
Yeah, I noticed that too.

andi t5
Sunday 24th April 2005, 16:06
dont forget syncro hubs rely on friction being present to work correctly adding moly may not be that good a idea in man boxes as well ( which is why volvo dont reccomend its use in their boxes)

Wobbly Dave
Tuesday 26th April 2005, 10:17
My recommendation is to use the molyslip in oil changes within the engine, on older cars. End of story.

Some have asked how to get it and as such I will bring a few bottles with me to the Stretton Fox.

andi t5
Tuesday 26th April 2005, 14:32
strange how no manufacter actually recomends this amazing treatment, if it was half as good as people claim surely the manufacturers would have sused it by now? further dave can you actualy explain how it makes your car start easier and run smoother? plus your even more amazing claim it reduces oil consumption which is caused as engines age by wear to the cylinder walls , valve guides ,and wear to the oil control rings,/piston ring lands are you honestly trying to say moly somehow magically repairs this wear?? come on i know we all like to believe in miracles but thats taking it a bit far,finally moly disuphide is a solid material what happens to solids in the engine lube system yep, it ends up clogging the filter, forget the white mans magic use premium synthetic oil and change it often

Wobbly Dave
Tuesday 26th April 2005, 14:46
I know what I saw and I know how it felt b4 and after. I think we can agree to disagree on this. I respect your opinion.

andi t5
Tuesday 26th April 2005, 16:01
fair enough mate