AMSOIL Synthetic 75W-90 Marine Gear LubeA reader asks: Do you have a replacement for Evinrude/Johnson HPF Pro High Performance Gearcase Lubricant? The label doesn’t show the viscosity of the product, so I’m not sure what to use.

Our answer: Yes we have a direct alternative for Evinrude HPF Gearcase Oil. AMSOIL Synthetic 75W-90 Marine Gear Lube is an ideal substitute for the HPF Marine Gearcase oil sold at BRP/Evinrude/Johnson dealerships. We have verified that the HPF Pro High Performance Gearcase Lubricant is in the 75W-90 range. So there is no issue with going with AMSOIL Marine Gear Lube in Evinrude or Johnson lower units and stern drives.

As a bonus, the AMSOIL Marine Gear Lube sells for roughly half the retail price of HPF Pro High Performance Gearcase Lubricant at Evinrude dealers.

Is Evinrude/Johnson HPF Pro High Performance Gearcase Lubricant A Synthetic Oil?

It doesn’t appear so. The BRP/Evinrude website refers only to the HPF Pro Gearcase Lubricant containing “synthetic E-P additives”. BRP does not describe the product as being a full or partially synthetic. This would imply to us that the HPF Pro product is a conventional lubricant. AMSOIL Synthetic 75W-90 Marine Gear Lube is a 100% synthetic oil. On this basis alone, we would deem AMSOIL as an upgrade over HPF Pro.

Why Doesn’t BRP/Evinrude/Johnson Publish the Viscosity Of HPF Gearcase Oil?

There’s a simple answer for that. BRP (Bombardier Recreational Products) doesn’t want you to know the weight or viscosity of their marine gearcase oil. If a consumer is in the dark about the viscosity of the OEM gearcase oil, they will be much more hesitant to buy an aftermarket option. Look for this trend to continue in the powersports industry. Although this ruse is a refreshing departure from the usual threats of warranty denial for using aftermarket oil. BRP is one of the worst culprits for strong-arming customers in this fashion.

The Virtues Of AMSOIL Synthetic 75W-90 Marine Gear Lube

AMSOIL Marine Gear Lube is ideal for any brand of stern drive, lower unit, V-drive or tunnel thruster requiring the API GL-4 or GL-5 spec. In other words, it is basically universal and can cover most any marine application. It lowers friction, fights wear, prevents foaming and has world class anti-rust/corrosion capabilities. To conclude, this quality AMSOIL synthetic gear oil is a great choice for any marine gearcase.

AMSOIL Synthetic DCT FluidAMSOIL has released a brand new transmission fluid for dual clutch or “DCT” transmissions called AMSOIL Synthetic DCT Fluid. AMSOIL’s incomparable reputation and 45 years of synthetic oil experience is sure to lend instant credence to this DCT oil for high performance cars.

Where Can I Buy AMSOIL Synthetic DCT Fluid?

Oildepot can sell this full synthetic dual clutch fluid at the lowest prices in North America. We offer fast shipping from 2 warehouses in Canada and 11 warehouses in the United States. We also offer a full suite of world-class European Formula Synthetic Motor Oils for a wide variety of applications. Request the latest pricing using the form on this page.

Features and Benefits of AMSOIL Synthetic DCT Fluid

  • Meets several OEM specifications
  • Provides outstanding performance from idle to red line
  • Delivers precise frictional properties
  • Withstands extreme heat
  • Performs in arctic winter cold
  • Provides consistent viscosity protection throughout its service life
  • Reasonably priced
  • Readily available

AMSOIL Synthetic DCT Fluid Is Suitable For the Following Transmissions

  • Volkswagen- DSG
  • Audi- S tronic
  • BMW- DCT Drivelogic
  • Nissan GT-R- GR6
  • Dodge Dart- DDCT
  • Mercedes Benz- 7G-DCT
  • Mitsubishi- TC-SST, Sportronic
  • Porsche- 7DT-45, 7DT-75, 7DT-45/7DT-70

What Is a Dual Clutch Transmission?

A dual clutch transmission is essentially two separate transmissions running in parallel and operating as one unit. While one gear is in operation on one side, the next gear on the opposing side is standing by and when the shift occurs, is put into play by a hydraulically actuated clutch. Gear shifts take place in fractions of a second in a smooth fashion, without loss of drive or hesitation. The near pristine gear change performance and reduced engine RPM fluctuations at shift points provides improved fuel economy.

Cars equipped with DCT transmissions often have manual or automatic modes allowing the driver to choose their level of input in gear selection. They also sometimes have “launch modes” for high RPM acceleration from a standing stop.

Here is an informative video from the transmission people at Tremec on the dual clutch transmission concept.