Molyslip

[Selgris]

Does anybody have any experience of using Molyslip in their engine? As a product it has ben around for a long time; but is it any good for a Stag?

[Mark S]

Oil companies take great pains to include all the additives and detergents needed in their engine oils.

It's a great trick if Molyslip, Winns, Slick50 and all can persuade you to buy something you don't need but it won't "protect" anything and could drop out and block oil galleries.

Just my opinion.

[Bakdraft007]

Oil companies take great pains to include all the additives and detergents needed in their engine oils.

It's a great trick if Molyslip, Winns, Slick50 and all can persuade you to buy something you don't need but it won't "protect" anything and could drop out and block oil galleries.

Just my opinion.

Maybe, but on the other hand, I have used it over the last 40 years, never had a problem. Engine oil does not have molybdemum disulphide in it, which is a very special lubricant. The claim you can run an engine for 5 mins without any oil in and it would be fine.

The only thing I would say was I think the oil pressure reading on the gauge dropped a bit after adding it, meaning the oil pump has less overall friction in it ( well thats my stupid theory)

IMG_2580.jpg

https://www.youtube.com/watch?v=pU4H9Vds0Tg

Who knows...

Just my opinion.

[Mark S]

If it says it on the bottle it must be true.
Do any independent trials back up any of these claims?
Do engine manufacturers recommend any of these additives or tip them in their engines to make them run better or reduce warranty claims in the future?
If you feel the need not to break the habit of using it, spend money in Halfords and it works for you, crack on. You might be right.

[jbuckl]

There’s only one snake oil that works. But it also has risks. Chlorinated paraffin. It’s not ok with bronze bushings.

[Neil in Deal]

Evenin' all,

there is an item in the new June SOC magazine, by Kevin Saggers, who has used Molyslip in his engine oil for over 40 years.
Interesting reading.
Personally, I've never used any additives in engine oil, relying instead on using quality brands of oil and filters, and regular changes of both.
I do however admit to being seduced into using STP "upper cylinder lubricant" in petrol in my first car, a 1965 Riley Elf. (I'm SURE it went better when I used it !! ) I was 18, and easily seduced.....
I'm sure a few people will remember "Redex" which was commonly used - my late Dad routinely used it in Morris Minors, Hillman Minx, Humber Sceptre, Land Rover Safari, to name a few.
It was usually "full tank and 2 shots of Redex please"....the good old days of petrol stations with forecourt attendants.....
Stay safe,

Neil.

[jbuckl]

Evenin' all,

there is an item in the new June SOC magazine, by Kevin Saggers, who has used Molyslip in his engine oil for over 40 years.
Interesting reading.
Personally, I've never used any additives in engine oil, relying instead on using quality brands of oil and filters, and regular changes of both.
I do however admit to being seduced into using STP "upper cylinder lubricant" in petrol in my first car, a 1965 Riley Elf. (I'm SURE it went better when I used it !! ) I was 18, and easily seduced.....
I'm sure a few people will remember "Redex" which was commonly used - my late Dad routinely used it in Morris Minors, Hillman Minx, Humber Sceptre, Land Rover Safari, to name a few.
It was usually "full tank and 2 shots of Redex please"....the good old days of petrol stations with forecourt attendants.....
Stay safe,

Neil.

In recent times when examining stripped modern engines after testing we notice patches on piston crowns that appear bright and clean. This turns out to be where the undisturbed injection of petrol spray has kept the crown in pristine condition!

[PJB]

And lots have not used it for 40 years without issue

sorry couldnt help myself.

[MandM]

I add STP to my 20/50 and Redex in the tank, cars been fine over the last 9 years, oil pressure still good, uses very little oil between changes, if it gives your added confidence then go ahead

[Mark S]

For older engines with flat tappets it is recommended to use an oil with high levels of Zinc DialkylDithioPhosphate to reduce camshaft wear. Unfortunately the amount of ZDDP in oils has been slowly reduced over the years due to it contaminating catalytic converters and more modern engines not being so prone to this wear.
Valvoline VR1 20W50 contains a higher level of ZDDP, is all you need and the best oil to use in classic engines requiring 20W50 like the Stag engine. (in my opinion).

How many oil manufacturers add Molybdenum Disulphide, PTFE or Chlorinated Paraffin to improve the properties of their oils, even "classic" oils? Why not?

The One armed bandit test often seen once upon a time at car shows used to demonstrate the benefits of some snake oil containing Chlorinated Paraffin. It is interesting and impressive but irrelevant for testing the properties required of an engine oil. That test will prove Head and Shoulders shampoo is a better lubricant than engine oil.

I wouldn't dream of mixing engine oil of the incorrect spec in a modern car. How do these companies convince anyone to pay £10 to pour a can of some thick jollop into their engine to contaminate their nice clean fresh oil.

[StagJonno]

"Valvoline VR1 20W50 contains a higher level of ZDDP, is all you need and the best oil to use in classic engines requiring 20W50 like the Stag engine. (in my opinion)"

Do you have evidence of this since VR1 was reformulated (at least for Europe) a couple of years ago. They no longer declare anything about ZDDP. I, and others have contacted Valvoline on this seeking confirmation that it's still present - they have so far declined to comment on this, just giving the "sales team" glib, smarmy line. I'd love to hear if you've had better luck.

I've therefore transferred my choice to Duckhams 20W50. Penrite has also picked up quite a lot of business from what I hear as a result of Valvoline's coyness..

[marshman]

I am one of those that have contacted Valvoline Europe. I did so on three separate occasions for confirmation - or otherwise that it contains adequate levels of ZDDP for the protection of "flat tappet" engines. On each occasion I got load a reply containing of "sales flannel" but no unequivocal confirmation of the actual levels. The data sheet does not mention ZDDP although it is mentioned on the webpage. The formula available in the USA does have specified ZDDP levels but it is different to the European version. Therefore if you insist on an oil with high levels of ZDDP avoid VR1 (yes it was good a few years back - but can't be confirmed now) and use one of the many other "classic" oil on the market.

Valvoline VR1 European data sheet here: (no mention of ZDDP) https://sharena21.springcm.com/Publi...b-ac162d889bd1

Valvoline VR1 USA data sheet here: (ZDDP quoted at 1400ppm) https://sharena21.springcm.com/Publi...2-ac162d889bd1

Information correct on 16th June 2020 and from Valvolines own website.

Roger

[DJT]

I've recently changed the oil and for the 2nd year I've used this: https://www.classic-oils.net/Classic...Heritage-20W50

1300ppm ZDDP and endorsed by Fuzz Townshend. Same oil pressure throughout as I had with Valvoline VR1.

[SteveD]

I'm another Redex user.

[richardthestag]

I've recently changed the oil and for the 2nd year I've used this: https://www.classic-oils.net/Classic...Heritage-20W50

1300ppm ZDDP and endorsed by Fuzz Townshend. Same oil pressure throughout as I had with Valvoline VR1.

+1 on classic oils

I buy 4 5l cans at the time, free delivery and not a bad price either