Mamala Bay and Outrun,
Cannot go into the chemistry as such, but the advantages of C, D, and F are for higher operating temperatures say > 500 F and better thermal stabilities at high temps for terrestrial engines.
You will see advanced POE esters (including more complex esters) being used for high-tier full synthetics in applications as motor oils, 2-cycle oils, long-life gear lubes, compressor oils, and long-life hydraulic oils.
Advanced PAO's might become cheaper as competition drives down the prices, assuming the price of crude stabilizes. More narrow cuts of PAO's will be seen such that blenders will not have to mix various PAO viscosities to achieve a target viscosity.
Alkylated Aromatics or Alkylated Naphthalenes, and AB's, or Alkylated Benzenes, will be used for low temperature operation or reducing the low temperature profiles of lubricants (better CC viscosities), and for producing cheaper synthetics.
The advanced silahydrocarbons (or tetraalkylsilanes) will be used in aerospace applications for temps to over 700 F because they are stable to radiation and various propellants.
Additive technology will need to be enhanced in order to keep up with these advanced fluid developments.
One of the emerging base oils not mentioned will be the natural esters and fatty acids of plants, or vegetable oils such as soybean, rapeseed, grapeseed, flax, sunflower and other oils. Once the oxidants are removed or proper additives found to counteract the natural oxidants, these oils will show a strong market intrusion. Chemists are now working on improving these natural oils which should be a boon to the agricultural sector. Some natural esters are now being used in motor oils, albeit at a low level. Advantages are numerous, in that these oils are readily biodegradable, are in need in poor countries without oil imports or natural resources, and can theoretically be produced anywhere there is productive land.
Search the "Question of the Day" thread and the "Interesting Articles" thread for more info on additives and base oils.
[ March 29, 2004, 12:58 AM: Message edited by: MolaKule ]