Alright, I poured the Amsoil in today, here's the stuff:
SAE 10W-40 Synthetic Motorcycle Oil (MCF) $10.35/qt
AMSOIL Synthetic Motorcycle Oils have been reformulated with new high performance additive technology that provides even greater multi-functional benefits for the special requirements of motorcycle applications. These independent and exclusive new AMSOIL formulations provide second-to-none viscosity protection for hot-running American and foreign motorcycle engines, transmissions and primary chaincases. Performance specifications include:API SG, SL/CF, CG-4; JASO MA/MA2; ISO-L-EMA2; API GL-1
Reduces Friction, Heat and Wear
In high heat conditions, engine protection is not sacrificed with AMSOIL Synthetic Motorcycle Oil. It has the best high temperature film strength (see High Temperature Viscosity Protection graph below) of all oils tested and contains a heavy treatment of anti-wear additives to reduce wear regardless of the operating conditions (see Wear Comparison graph at right). AMSOIL 10W-40 Motorcycle Oil is thermally (heat) stable and contains maximum levels of oxidation inhibitor additives. It is extremely resistant to breakdown and engineered to prevent damaging sludge and carbon deposits for superior engine cleanliness.
And for the differentials:
Synthetic Gear Lube SAE 80W-90 (AGL) $9.20/qt
High quality replacement for applications specifying SAE 80W-90 conventional gear lube. Synthetic construction provides improved cold flow properties, high viscosity index and heat resistance. Contains an over treat of high quality additives, exceeding the minimum standards. Provides excellent wear protection and long equipment life.
AMSOIL 80W-90 Synthetic Gear Lube is a multi-functional product designed to surpass the requirements of equipment and automotive applications calling for an SAE 80W-90 viscosity grade. Formulated with wax-free synthetic base oils and high quality additives, AMSOIL 80W-90 Synthetic Gear Lube resists thermal breakdown. Its naturally high viscosity index and shear stable construction improves film strength and viscosity retention. AMSOIL Synthetic 80W-90 Gear Lube prevents wear, resists heat, and protects gears. It lasts longer in service than conventional gear oils and increases equipment life.
My Rancher is a bit old and sat in storage for a few years before I purchased it , I don't think the oil had been changed much by the previous owner. The old oil was really nasty
- It was a grey-sandy color and looked a bit watered down. I noticed immediately after changing the oil that my Rancher now has more power and better throttle response, also it shifts much smoother.
As posted in a previous thread, I have been concerned about my ESP being really loud. My electronic shifting previously produced a high-pitched "clink!" sound when shifting, but now it is a nice smooth "click" with the Amsoil synthetic oil. So far, so good!!