by cass3958 » Sun Aug 04, 2019 11:37 am
John there is an addictive I have used when assembling engines and also in my racing engines called Activ8
https://www.activ8lubricants.com/. I assume it is a bit like Molyslip which is used in gearboxes and back axles.
I have seen demonstrations of this stuff being used in friction situations where it out lasts oil, stays cooler and protects the bare metal. A small amount is added to the normal oil you use in your engine but it alleges that it coats the metal surfaces and protects them especially on start up.
I do not know what Glyn knows or thinks of this product and if the assertions are true?
Researching on the interweb I found this gem which is possibly what Glyn is going to say.
Activ8 is what is known as a "EP" additive, meaning Extreme Pressure. These are a class of compounds that do nothing to improve oils under normal hydrodynamic (ie oil film) lubrication conditions, but which form a chemical surface film on the rubbing surfaces under the effects of temperature and pressure when hydrodynamic lubrication breaks down. That surface film gives the rubbing areas extra protection for a short time in the absence of oil. This is known as boundary lubrication conditions and should rarely if ever happen in an engine. Typically EP additives used to be favoured in old gearbox oils, hence ratings such as EP90, because at low speeds and high loads you may not get sufficient oil film (think waterskier, at speed the water holds him up but at low speed the water moves aside and he sinks - it's the same with oil films in your engine, there should be no moving metal to metal contact and always an oil film in place). This is why the "bike show" demo works. They create a situation of slow movement and high point loading - exactly what doesn't happen in your engine, then show how a boundary lubricant will allow it to run for a while in the absence of an oil film. What is happening is that the EP additive is attacking the surface of the metals to form solid lubricant compounds..... and in the meantime the acidic nature of the additive is also attacking every other component wetted by the oil.The oil companies have known about EP additives for years and they don't use them, for 3 good reasons. First, they aren't needed. Modern oils protect very well and cling to surfaces for protection during cold startup. Second, they cost money and if they aren't needed why put up the cost of your product to no end? Leave it to the suckers who want to pay more for the additive than the oil. Third, as I said they are acidic and will attack other components in the engine.The late great JR of PB did a test some years ago of various additives on a sensitive dyno and found absolutely no change in power outputs.Of course, if you plan to run your engine out of oil something like this may help you run for a couple more minutes. But TBH about the only good thing I can say about it is that unlike Slick 50, a slurry of PTFE particles, it won't block filters and oilways.
John there is an addictive I have used when assembling engines and also in my racing engines called Activ8 https://www.activ8lubricants.com/. I assume it is a bit like Molyslip which is used in gearboxes and back axles.
I have seen demonstrations of this stuff being used in friction situations where it out lasts oil, stays cooler and protects the bare metal. A small amount is added to the normal oil you use in your engine but it alleges that it coats the metal surfaces and protects them especially on start up.
I do not know what Glyn knows or thinks of this product and if the assertions are true?
Researching on the interweb I found this gem which is possibly what Glyn is going to say.
[quote][i]Activ8 is what is known as a "EP" additive, meaning Extreme Pressure. These are a class of compounds that do nothing to improve oils under normal hydrodynamic (ie oil film) lubrication conditions, but which form a chemical surface film on the rubbing surfaces under the effects of temperature and pressure when hydrodynamic lubrication breaks down. That surface film gives the rubbing areas extra protection for a short time in the absence of oil. This is known as boundary lubrication conditions and should rarely if ever happen in an engine. Typically EP additives used to be favoured in old gearbox oils, hence ratings such as EP90, because at low speeds and high loads you may not get sufficient oil film (think waterskier, at speed the water holds him up but at low speed the water moves aside and he sinks - it's the same with oil films in your engine, there should be no moving metal to metal contact and always an oil film in place). This is why the "bike show" demo works. They create a situation of slow movement and high point loading - exactly what doesn't happen in your engine, then show how a boundary lubricant will allow it to run for a while in the absence of an oil film. What is happening is that the EP additive is attacking the surface of the metals to form solid lubricant compounds..... and in the meantime the acidic nature of the additive is also attacking every other component wetted by the oil.The oil companies have known about EP additives for years and they don't use them, for 3 good reasons. First, they aren't needed. Modern oils protect very well and cling to surfaces for protection during cold startup. Second, they cost money and if they aren't needed why put up the cost of your product to no end? Leave it to the suckers who want to pay more for the additive than the oil. Third, as I said they are acidic and will attack other components in the engine.The late great JR of PB did a test some years ago of various additives on a sensitive dyno and found absolutely no change in power outputs.Of course, if you plan to run your engine out of oil something like this may help you run for a couple more minutes. But TBH about the only good thing I can say about it is that unlike Slick 50, a slurry of PTFE particles, it won't block filters and oilways.[/i][/quote]