Quiet Engines again

mandlmaunder

mandlmaunder

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Just serviced our 12 yr old Yanmar 2GM20's and added Superlube oil addittive, almost instantly(within 5 mins) the engine noise that we have become accustomed to over the last few years disappeared. So am assuming engine wear and heat disapation also improved.
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Cant believe the difference, works similar to Slik50 .
 
Interesting Mark. Be good if you can remember to tell us if, in a year's time, that difference has been sustained. Any noticeable change in performance/smoking etc?
 
Can anyone remember the name of the product i put in my old volvo. they claimed they drove a truck e to w across america with no oil in but engine was fine.....i think it was promax or something?
 
I once talked to a lubrication specialist in the motor industry. He said that the main benefit of these oil additives was felt by the guy who sold them.
 
Query - If we add slippy-bulk to our oils, what happens to the bore? It should not have its pores filled with gunge or it will be considered to be glazed...true or false? I like the idea of rejuvenating low oil pressure from a bottle, but maybe we should be adding Deglaze to the fuel as well?
 
Absolutely right. Oil companies spend millions on research and development of their lubricants. Is it really likely that someone in a shed in their garden is going to come up with some miracle treatment that will improve it? The reality is that many of these products react with additives already present in the original lubricant, with predictably negative effects. A further effect has been reported with some of the PTFE products, which solidified in oilways, cutting off flow to vital components.

There are many websites that reveal some of the facts about these products. One of the most comprehensive is this one, even though it is aimed at off-road vehicles. Well worth a read, especially in this thread as it addresses some of the points made previously.
 
I'm with Vyv Cox and Earlybird on this. If an engine is worn... it's worn. Some additives or higher viscosity oils may minimise the symptoms of the wear but perhaps at the expense of poorer lubrication elsewhere in the engine - especially on start-up. Sawdust used to be a good way to quieten noisy differentials - I suspect this additive was not really helping anything except the sale!
Morgan
 
Bit of Fred Drift here, but when I got my (now) old Honda CBX 550 bike, with 26k on the clock, at the first oil change I put Slick 50 in the engine and 58000 miles later, it's still going strong, which is quite amazing really as they're supposed to wreck the crankshaft at 50k and need a new camchain tensioner every 8k. Funnily enough, it's still the same tensioner fitted 38000 miles ago, and I despatched it for 25000 of those miles. Discuss! /forums/images/graemlins/grin.gif
 
I'm always deeply sceptical about all these various "miracle" additives! What sort of noise was it that's just stopped? Also, please let us know if you notice any change in oil consumption rate over the next season!
 
Additives can give short term gain, but research shows that in the longer term they do more harm than good. Briggs and Stratton tested a well known brand that claimed the engine would run without oil after treatment. They took 2 brand new engines, ran them for 20 hours one with one without additive. They then drained the oil and ran them for a further 20 hours without oil (!!!). Says something for the durability of B&S engines!

They then stripped them to examine the damage: the cranks on both were badly scuffed, but the engine WITH additive had a badly damaged bore and piston as well, while the other had largely survived.

The real problem is that most of these compounds add particles to the oil which are supposed to settle on the working areas. So what stops them settling elsewhere like in the filters and narrower oilways, clogging them and causing oil starvation? PTFE -which is commonly the 'active' friction modifier - expands enormously with heat - the so called 'plating' action of the blurb. The trouble is it is found to do it throughout the engine - blocking oilways, and filters etc and doing far more long term harm than good.

Just a thought, if the bottle says ' shake thoroughly before use' and you put it in your engine - how do you shake the engine thoroughly before you use it again?

Having said that, I have used Molyslip to good effect on a noisy differential, but there its just running in an oil bath with no filters and oilways to clog.
 
Very interesting site , but the point of taking 2 new engines and running a test of this sort will almost always not be comparable to running older engines with years of wear (even with Shortened recomended oil change intervals)that the additives can smooth out.
I will take not of engine Db's during the next few years and keep threads upto date.
1 other point , technoligy continues to advance, new year , new idea's!!!
 
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