No offense taken, and well.... lets look at the MSDS to Tru-Oil, keeping in mind the MSDS is a safety document, not a true ingredients list.
It contains mineral spirits at greater than 56 percent - a pretroleum distillate, in the form of Stoddard solvent, a form of white spirits.
It contains naphtha, no percentage given, another petroleum based chemical, its listed down lower on the MSDS as also is "petroleum"
It contains "modified oils" - at less than 33 percent. Those are what constitute the varnishes (proprietary).
And it contains less than 11 percent linseed oil, maybe its the polymerized kind.
Ok, thats what Tru-oil is. Now lets find out what polymerized linseed oil is.
From the Wiki page on linseed oil -
Wood finish
When used as a wood finish, linseed oil dries slowly and shrinks little upon hardening. Linseed oil does not cover the surface as varnish does, but soaks into the (visible and microscopic) pores, leaving a shiny but not glossy surface that shows off the grain of the wood. Wood treated with linseed oil is resistant to denting and scratches and is easily repaired, but the surface is not as hard as a modern varnish, and the wood will slowly absorb moisture if allowed to stay wet. Soft wood is protected from denting, but requires numerous applications and even more drying time than harder wood. Garden furniture treated with linseed oil may develop mildew. Oiled wood can be yellowish and can darken with age.
Linseed oil is a traditional finish for gun stocks, and a very fine finish may require months to obtain. Several coats of linseed oil is the traditional protective coating for the raw willow wood of cricket bats. Linseed oil is also often used by billiards or pool cue-makers cue shafts, as a lubricant/protectant for wooden recorders, and used in place of epoxy to seal modern wooden surfboards.
and more
Boiled linseed oil
Boiled linseed oil is used as a paint binder or as a wood finish on its own. Heating the oil causes it to polymerize and oxidize, effectively making it thicker and shortening its drying time. Today most products labeled as "boiled linseed oil" are a combination of raw linseed oil, petroleum-based solvent and metallic dryers. The use of metallic dryers makes boiled linseed oil inedible. There are some products available that contain only heat-treated linseed oil, without exposure to oxygen. Heat treated linseed oil is thicker and dries very slowly. This grade of linseed oil is usually labeled as "polymerized" or "stand" oil, though some types may still be labeled as "boiled."
So to me, from the information I can gather, Tru-Oil is a petro-based varnish with linseed oil, while polymerized linseed oil is a heat treated linseed oil which has been polymerized by that treatment. Different animules.
Glad we got that all cleared up.
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