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Michael T

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JC290

Good info thanks 

Babyboomer

Been using the blend for years

Michael T

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Black_Diamond

I think the outboards spin faster than the inboard and I/O engines. 

Michael T

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Black_Diamond

The high rpm oils, like for motorcycles are not always the same as a standard automotive engine oil.

Michael T

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212rowboat

the oil intended for higher rpm has a different compound so as not to break down at those RPM's...

the polymer structure is mucho different.  the high revs need whats called a friction modifier which allows the oil not to 'peel' off hard parts under fast rev, but as many things, it's a push where something else is given away to gain that protection...

because it's protecting the engine under fast rev, it has the polymer structure to do that- (which is avoiding 'peel' and not allowing hard parts to formulate 'cajun crust' inside the engineered 'gap' and therefor robbing an engine caked with 'cajun crust' of lubrication which seriously shortens its intended life cycle) -, it gives up the oils ability to 'peel' of such things as lifter internals, which is desirable.  You want lifters to charge and recharge every cycle instead of hold onto a charge, which can cause bent lifter rods, broken rockers, and crack valve seals and seats...


by my reckoning, you fellers on both sides of the MercSyn oil are selling yourselves short... Merc, as any other maker, is going to require the use of a branded oil in effort to keep their investment into whoever is producing their oil viable, but also as a 'catch all' oil that will protect your investment 'for the uses most will be encountering', which in turn will keep them from performing a lot of warranty work, and protect their reputation..... but...

 'for the uses most will be encountering'

MT's 8.2l catalyzed monsters may in fact benefit from the oil by Amsoil or Kendell, while Mr.X's 8.2's would benefit from an oil full of the stuff found in classic/antique car oils- for sitting, in other words, more than for use...  How would either know? : an oil analysis... MT likely brings his up on plane and holds her there long enough to evaporate any water and most asphalt like globs and needs an oil that offers protection tailored for HIS use, and Mr.X, who docks more often may not, would need an oil that clings like madness to hard parts within (full of zinc)... Merc is playing it safe to offer an oil that spans both those protections.

if you're wanting to protect your warranty, use what is recommended and follow religiously the maintenance schedule.  it's that simple, especially the last part.

if you're interested in getting longevity out of your engine and one that will hold true for years after your warranty expires, get an analysis of the oil you're using now and follow the recommendations given by the analyzer.... YOUR use will dictate what you need better than a catch all general purpose oil.  

212rowboat

nope.. I got drunk and scrubbed boat upholstery.. :-)

I can't stress enough the benefit of getting an oil analysis... it can tell you where you're deficient, where you're strong, if you're wasting by changing too often or destroying your engine by waiting too long.. it can tell you the health of your internals by residual ppm's of hard parts deterioration, as well as the likelihood of engine catastrophe due to using an improper lubricant (even if that is the lubricant specified by the maker).....

I'm also willing to wager heavily that if warranty work was rejected due to type of oil, but it is the oil your report recommended based on your own use/circumstance, you could beat it in an independent arbitration.  

MarkB

All I can say is I commend Mercury for simplifying their products, especially when you have an outboard and mercruiser oil that is exactly the same thing just in a different label.  But what I don't get is if they discontinued the full synthetic over a year ago, why did I get a bottle 8 months ago with one label (purple) and a few months ago they changed the label to something new. Why would you change a label when you are discontinuing the product??

Michael T

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