Question about McCulloch Garden
The fuel ratio is determined by the oil and not the machine. Not all
oil is the same. When a manufacturer recommends a fuel ratio,
they are trying to direct you to the oil that they offer for sale. Over
the years 2 cycle oil has been offered in 16:1, 32:1, 40:1 and 50:1 .
Unfortunately for the user it is easy to get confused when selecting
oil. It is not difficult if you just think about it. There are two major
differences in 2-cycle engines. There are water cooled and there
are air cooled engines and the oils are entirely different. Water
cooled (outboard) engines run at much lower temperatures and at
much lower RPM's. It is necessary for outboard oils to burn during
the combustion cycle. In this situation the oil turns to smoke so
that the oil is not deposited in or on the water. Air cooled engines
run at a much higher temperature and must not be used with
outboard oils. In an air cooled engine the oil should leave the
muffler in liquid form. If the oil turns to smoke it is not able to
lubricate the engine and a very undesirable carbon deposit is left
behind leading to engine failure or stuck piston rings.
Since a top quality mixing oil will cost $12 or more for a six pack
(that comes out to well over $100 a gallon of oil) there is little
wonder that so many companies want a piece of that pie. Cheap
oils no bargain even if it is free. If the oil says it is for outboards,
lawn mowers, string trimmers, and chain saws, they are telling you
that they know nothing about 2 cycle engines and only want to take
You should choose an oil whose brand is that of an engine
manufacturer. Obviously these companies are not in the oil
business but they want to make sure that they do not cause
warranty claims from an inferior oil. The life of you engine is
dependent on choosing a good grade of oil. You should pick an oil
that you trust and that you can purchase on a consistent basis.
Unlike gasoline, oil does not deteriorate with age. It is better to buy
enough to last you a year or two than it is to change brands every
time you run out.
Posted on Sep 14, 2009
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Posted on Jan 02, 2017
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