MANUFACTURER OF LUBRICANTS AND ADDITIVES:About Us Change they say is constant. Today however, change happens at a faster pace than ever before. Since 1916, Primrose Oil Company has been at the forefront of the lubricant and fuel treatment industries. Primrose Plus, Premium Select, Syn-O-Gen®, and Enviro Blend® highlight our commitment of maintaining leadership in these industries. New technology, environmental and regulatory mandates, and most importantly, our customers’ needs drive our cutting edge developments. Primrose Oil Co. is always conscious of providing a “total value” product. Only the highest quantity base stocks and additives chemistries are consistently used during development and manufacturing. This results in top quality products able to outperform normal expectations. Superior performance directly improves “the bottom line” by reducing maintenance costs while increasing overall equipment productivity. Innovative engineering and consistent production of high quality products are cornerstones of our business. Another cornerstone is our people. We strive to instill in them the knowledge and understanding to be able to find the proper solution for the customer where he needs it most—in his place of business. Primrose Oil Company remains at the forefront of the lubricant industry. A changing technology base, changing customer demands, and a desire to meet the needs of the future, is keeping us on the move… movement that is carrying us forward today and tomorrow.

1. Asphaltenes in ULSD
Asphaltenes in diesel fuel are a major concern with today’s ultra low sulfur diesel fuel
(ULSD). Asphaltenes are molecular substances commonly found in crude oil and in the
form of asphalt, but are now being found in ULSD. There are many theories that exist as
to where these molecules are coming from.
Some theories suggest they are the result of removing sulfur from ULSD, in which doing
so also removed aromatic content in diesel fuel. So, this removal of aromatics caused
them to no longer be able to be dissolved and dispersed. Another theory says the cause of
them is high pressure, sometimes around 37,000 psi, along with fuel being continuously
re-circulated at temperatures of 150 ˚C in the common rail found in diesel engines. This
then results in asphaltene droplets that conglomerate together turning filters and diesel
fuel black. Fuel inside one engine manufacturer’s injector actually reaches a temperature
around 300 ˚C. These theories in reality can be combined.
There may be theories as to where asphaltenes are coming from, but the fact is that
asphaltenes exist in ULSD.
This requires the need to combat asphaltenes by use of Klenz ID that contains thermal
and oxidative stability agents and dissolving and dispersant additives that will take care
of the asphaltenes that already exist or occur after the fuel is in your tank. See below
pictures of how the Power Klenz ID and Winter Klenz ID products, No’s
5001/5007/5750/5757 – will dissolve and disperse asphaltenes. This is being
demonstrated by use of Klenz ID dissolving and dispersing common asphalt, asphaltenes
are commonly found in this form, which is a mixture of “tar” and rock.