Motor tuning liquids?

[Timber020]

Many of the additives are just bigger doses of what is put in the oil anyhow.

Oil is like a cake, different ingrediants carefully measured and applied. Now by adding an additive is often like adding a few more cups of sugar to the mix.

Some additives do work, and work well. But they are few and far between.

A guy I worked with had a nice SSS sentra, and put some additive that thinned out the oil and was supposed increase economy, HP and to clean the engine. It did it all right, cleaning out all the build up that was holding the oil in, engine dropped enough oil to make GW Bush want to invade its garage.

[Henk]

As far as I know most of the oil additives try to work by coating everything with a thin layer of Teflon to make the sliperier (is that a word?) As stated above, not a great idea when you have a wet clutch. Wet clutches are also the main reason that car oils with "Friction modifiers" are a bad idea in bikes.

[Hitcher]

It's crap. Homoeopathy or aromatherapy for the internal combustion engine. Waste your money if you must. Just don't pretend it works or coin a bogus description for it like "alternative medicine".