Had a look at the chart, what's the issue???

No issue, i just wanted to see how much oil the 2 stroke actually
used. The benchmark is a 4 stroke motor which is usually is not known
as "uses oil".

I didnt want to fel bad ripping around burning loads of oil, thus I
want to see how much i am useing compared to if I had bought a 4
stroke. The boat and the other motorized toys are getting winterized
(( So I have lots of time on my hand for these kind of questions


It confirms that the modern 2 strokes use less oil than the older ones,
but this is an allusion really when you take into account the extra

No, actually it doeasnt, unless you consider the optimax old desogn.
The optimax is an older design and the first generation DFI. Lets see
to how many generations they will actually make it ...

The chart shows Merc Optimax, Whoevers (Bombardier?) ETec, and Mercs 4
stroke Verado. The oldest design there is the optimax. All of the
above use less oil as a conventional 2 stroke.


costs & while the dealers won't admit it you "should" clean the holding
tank every year. Once in there oil subject to heat & moisture
deteriorates into sludge with even the smallest amounts of water.

This is a very good point which I will investigate right away in order
to keep my motor happy This flushing procedure can be done with
cheap oil or maybe other suitable substances. Do you have any
procedure or recommendation?
In the end it may be cheaper to buy a new oil tank? This needs to be
looked into.

Again "all" the oil in a 2 stroke (by your graph the same or more than
a 4 stroke) still goes somewhere, either burnt or out the exhaust as raw
oil, I accept what you say about oily rags etc but we're talking the
entirety of the oil, not just sundry cleanup wipes.

Yes correct. This point was not looked at in my comaprison and was not
intended to be looked at. It is a very important and valid point
though. Someone needs to create an eco balance to see whats worse in
the end. If 4 stroke oil is recycled then thats best. If its done
like some people I know do by not recycling or just recycling the oil
but not the filter and rags then it maybe worse than the 2 stroke just
burning it up.


There is another issue with the dfi 2 strokes & their oil, it's related
to raw oil injected into the crankcase, the oil builds up till excess is
"transferred", it either then gets burnt or goes straight through the
exhaust as raw oil.

I see no serious issue. Exactly that happens with conventional 2
strokes ... of course in general its not good that 2 strokes burn oil
....

The system injects very small amounts at idle or
even low revs, however the oil is subject to considerable heat buildup,
unlike 4 strokes oil or even an old tech 2 stroke when it was diluted
with fuel & traveled through the engine relatively quickly. This is why
they've promoted special oils, because the oil can get hot enough to
bake behind the rings & it's all down hill from there.

Yes the DFI motors need the expensive oil. I only know the optimax
and it partly recycles its oil, which is good but this requires
different oil then the normal 2 stroke uses which is bad, as the
recirculated oil must be made so it doesnt break down from it
(expensive).


Harry is a liar & has never actually owned a boat much less an optimax
engine. As for his old "hundreds of hours" lie, when he fabricated that
phantom boat in 98 he claimed here after a few mths use he had 200 hours
on it, it's just more evidence of a total lie.

Its not for me to judge that. I can not see a reason that would make
people claim they have owned certain boats and motors which they
actually havent. But to each their own.

Karen, I appreciate the discussion with you and the points you bring
in! You seem to be more knowledgable about the subject as ... lets say
.... the average female (and in fact male)... Dont take this wrong,
this isnt sexist talk!

Whats your background and your background with motors if I may ask?

You are also welcome to email me. My email as posted is real.

Matt