In 1972, AMSOIL INC. introduced AMSOIL Synthetic 10W-40 Motor Oil and became the first company in the world to market and manufacture an American Petroleum Institute (API) rated synthetic motor oil. In 1975, AMSOIL introduced a synthetic diesel oil, and with it, coined the term "extended drain intervals."

Since then, AMSOIL synthetic diesel oils have been used as extended drain lubricants in transportation, equipment and stationary engine applications. In every industry, they have proven effective in improving engine durability and fuel economy. AMSOIL customers report significant savings realized through reductions in downtime, parts replacement, lubricant replacement, lubricant disposal and fuel consumption. Fleet demonstrations and independent testing confirm what AMSOIL customers report: using AMSOIL synthetic diesel oils saves money.

Long Lasting Service:
AMSOIL synthetic lubricants have a long service life. Non-synthetic lubes can break down from oxidation and heat. When that happens, they sludge-up, form deposits and have to be changed. AMSOIL lubricants resist breakdowns, so they stay intact and run clean. The resistance to heat and oxidation prolongs the service life of AMSOIL synthetic lubricants, significantly extending drain intervals.

Low Temperature Fluidity/High Temperature Stability:
AMSOIL synthetic lubricants resist the effects of heat and cold far better than nonsynthetic lubricants. AMSOIL synthetics will make the difference when starting an engine that's cold, and cooling an engine that's hot!

Rust and Corrosion Protection:
AMSOIL contains special additives to prevent rust and corrosion - a vital factor for equipment that sits idle or is stored for part of the year.

Anti-Friction:
AMSOIL synthetic lubricants are "super-slippery." They are extremely effective in reducing friction and drag between moving parts, resulting in reduced wear, more efficient operation and better fuel economy.

Versatile For Most Applications:
In most cases, AMSOIL synthetic lubricants eliminate the need for specialty lubes. AMSOIL products meet or exceed the performance specifications of a wide variety of farm machinery.

Customer Testimonials

Wallace Dunn, Richfield, KS
I started using AMSOIL in the spring of 1983.Using AMSOIL Synthetic 10W-30/SAE 30 Heavy Duty Diesel Oil and the AMSOIL By-Pass Oil Filter, we run 900 hours between oil changes on the 160 HP Case and 700 hours in our 120 HP Deutz Allis air-cooled. I use the AMSOIL 20W-50 Synthetic Oil in my Massey 510 combine on a two-year oil change schedule. I am very pleased I was introduced to AMSOIL Products.

Harold Isaac, Hooker, OK
I use AMSOIL Synthetic Engine Oil, Synthetic Multi-Purpose Hydraulic Fluid and the AMSOIL 80W-90 Synthetic Gear Lube in my two Deere tractors, my 855 Steiger and my N6 Allis combine. I also use the AMSOIL By-Pass Oil Filters and change oil once a year. Our farm uses nothing but AMSOIL and we are happy with the results. There is a large difference in performance between petroleum oil and AMSOIL, as well as a lot of money and time saved.

Warren Bowker, Richfield, KS
I started using AMSOIL in 1975,and right off I could see the difference, so I put it in everything on the farm. I use AMSOIL 10W-40 Synthetic Oil in my six tractors - three Internationals and three John Deeres - and in my Massey combine. We use the AMSOIL 15W-40 in our two semis, a Mack and a Detroit engine, along with the related AMSOIL Synthetic Lubes in the transmissions and differentials. AMSOIL 75W-90 Gear Lube is in the irrigation gear heads and this has lowered the fluid temperatures considerably. We are 100%AMSOIL and plan on staying that way.

Steve Patterson, Copeland, KS
One of our irrigation engines runs all year with no oil change using AMSOIL and AMSOIL By-Pass Oil Filter. AMSOIL 75W-90 Synthetic Gear Lube is used in the gear heads on a five-year change period. My records show that I 'm saving 58 cents on the dollar on lube cost between the cost of AMSOIL and petroleum lubes.

Francis and Rock Ormiston, Kismet, KS
We have been using AMSOIL totally since 1974.We farm separately but do, on occasion, interchange some machinery. Between us we have four large 4-wheel drive John Deere tractors from 200 to 400HP. We use AMSOIL in all the tractors and the combine, and the AMSOIL By-Pass Filters, too. We change oil once a year in the early spring. We have not figured our real savings by using AMSOIL, but for sure it 's a strong 50 cents on the dollar over petroleum oil, and saving a lot of labor on very little downtime. There is no way we could afford to go back to petroleum, even if it was given to us free.