Negative effect!

Solitaire

Solitaire

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I recently had problems with a blown exhaust gater which "cooked" the engine - V8 - I thought I'd lost it, but several oil changes and then re filling with Mobil1 seems to have done the trick. The engine is running as well as ever, in fact better. At the same time as the Mobil 1 was put in so was a dose of Slick 50. Over the weekend I was discussing this and the the other parties intemated that there was no point in putting Slick 50 with Mobil 1 as they would have a negative effect on each other and that it was a bit of a waste of hard earned boating dosh!
Does any one on the forum know if this is the case? I have to say that it was an engineer that put in Slick 50!

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their is a website about oil additatives that I'll look for it's basically totally against them and gives good scientific fact as well. Having said that in race days used to use Wynns to protect the bearings.

<hr width=100% size=1>Jim

Draco 2500
 
I've heard lots of scare stories about Slick 50 and other similar additives but I don't know that any of them are definitely true. The main objection seems to be that the teflon particles clog the oil filter and that the reduced friction in the bores impairs the oil control piston ring's function so they burn a bit more oil. The trouble is that most people who use these things put them in old engines to give them the "last rites" so they never run the cars long enough to find out!

Personally, I'd be inclined to avoid it. I've never had an engine failure due to worn out bearings - supposedly the biggest advantage of Slick 50. Do you want your bearings to last for 100 years? Mobil 1 is generally reckoned to be the best oil you can buy and it won't have been developed without massive, intensive research. Depending on how you use the engine, it might not even be worth using Mobil 1. If the engine never really gets used hard for extended periods (a few hours at a time at 3/4 throttle or more), you might even find that it would be kinder to use a cheaper oil and change it more often. Unless the oil gets up to a good working temperature for a fair amount of time, the fuel that seeps past the piston rings won't ever evaporate out so it gets progressively thinner.

It might be worth doing a compression test on the engine. If you've cooked it badly, the two most likely problems will be a partial seizure (after which the aluminium of the piston skirt wipes over the rings so they can't seal effectively) or a blown head gasket / cracked head(s) / warped head(s). If all the compressions are about the same on both banks, I'd say you'd got away with it!

Good luck!





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<font color=blue>I have used Molyslip for years and consider it better than Slick 50. I swear by the stuff, you not only protect all moving parts you get better performance and fuel economy.
One must NEVER add it to a new engine as the engine will never run in.

<hr width=100% size=1>http://www.alexander-advertising.co.uk
 
The site that discusses this is <A target="_blank" HREF=http://www.the-oilman.com/questions/link4.html>http://www.the-oilman.com/questions/link4.html</A>. There is a thread in this forum's archives from I guess, about 3 months ago where I posted a lot more on the topic. The gist of this is that all major oil companies spend millions of dollars/pounds on the development of lubricants that have a balance of additives that assist in the efficient lubrication of the difficult parts of your engine without (and this is the crucial bit) interfering with each other. Much of the development programme is concerned with eliminating interactions that might produce lacquers, varnishes, sludges and other problems.

So the user takes his sump full of this highly developed product and throws in a bottle of some snake oil, expecting to improve its properties. He must be joking! The result is likely to be deposition of some parts of additive packages, either from the oil or the Slick 50, causing all sorts of problems. In the past Slick 50 was apparently only PTFE in solution/suspension but it is now far more dangerous, as it contains various extreme pressure additives. There is a strong likelihood that reaction will take place.

On a slightly different tack, it has been common for fitters to use Slick 50 as an assembly lubricant for industrial rotating equipment. This practice has been banned by all major oil companies and many equipment manufacturers because it leads to problems when the machine goes into service. Perhaps the worst of these is oil foaming that can cause bearing, piston ring and cam failure in engines within a very short period of time.

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Wow! What a knowledgable bunch! Thanks very much. I must admit that given Mobil 1 costs about £40 for 5 litres that any additional additives would be surplus to requirments, but then I thought oh well what harm can it do? Thanks one and all for the response and I'll check out the web links.



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When I had my Alfa 75 they are known to be Very aggressive on oils and have quite high oil consumption even in good nick. One dealer serviced it and hey presto no oil consumption, went back and asked what they'd done turns out they used Shell Helix plus a semi synthetic. Also said they'd found it the absolute best as regards the oil consumption issue. Only ever run Mobil 1 in turbo'd engines where it's the dogs but think it's overkill in anything else.

<hr width=100% size=1>Jim

Draco 2500
 
i know someone who covered his in patches and paint to make it look knackered and deter theives.

i admit this defeats object if you are out to impress.

I know Stingo did a very dodgy paint job on his outboard to acheive the same.

<hr width=100% size=1><font color=red>I can't walk on water, but I do run on Guinness</font color=red>
 
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