With all the oil threads since the first time that the sun rose in the east, I couldn't find one that suggested brands for the 80-90W gear oil that is used in the reduction gear box or the final drive on the snowblower auger. Since I am familiar with the final drive and know that it has brass gears in it, then there is only one sensible choice of gear oil for that one. GL4 80-90W gear oil! It is difficult to find today since almost all modern machinery now uses GL5, however, the GL5 will attack the brass gears and slowly dissolve them. This is a well-known issue with 4-speed cars of the 1960s with brass synchronizer rings in them.
Now comes the conundrum, what to use in the gear reduction box of the BX5455HD (which coincidentally is the same as the Series 80 BX2822 55" commercial snowblower. The manual only says to use 80-90W HP gear oil. That suggestion leaves a lot to be desired. Do I use a standard dino gear lube or would a more modern synthetic gear lube be a better choice? That is the problem with being old and owning older cars, you never have a need to learn about more modern lubricants. Please give this senior citizen some guidance, your choice of lubricant, and why.
PennGrade 1 is the new name for what was formerly known as Brad Penn Lubricants.PennGrade 1® Multi-Purpose ‘Classic’ Gear Oil GL-4 SAE 80W-90 is a specially blended using high quality premium mineral base stocks and select additive technologies. It is designed to be used with “yellow” metallurgy (brass, bronze, copper) and other ‘soft’ metals used in synchronizers, bushings, thrust washers and other components typically found in classic manual transmissions and transaxles. In applications specifying API GL-4 quality lubricants, use of API GL-5 lubricants with higher extreme pressure additive activity/concentration can damage these ‘soft’ metal components. It is not intended for use in ‘limited slip’ applications and does not contain friction modifiers which can interfere with proper synchronizer performance. PennGrade 1® Multi-Purpose ‘Classic’ Gear Oil GL-4 SAE 80W-90 is recommended for use in such time-honored traditional manual transmissions as those made by Muncie, Rockwell, NVG/New Process, Borg-Warner, Saginaw, and Ford as well as those used in many imports. It is suitable for use in Nissan UD trucks, Mitsubishi Fuso trucks, Volvo trucks and Mercedes Benz truck manual transmissions as well as the transmissions /transaxles on Nissan cars and SUV’s, Mitsubishi vehicles and Suzuki vehicles calling for an API GL-4 level lubricant. Not for use in applications requiring API GL-5 quality extreme pressure (EP) lubricants or where OEM specialized fluids are mandated. Always consult the equipment owner’s manual for proper fluid selection.
Now comes the conundrum, what to use in the gear reduction box of the BX5455HD (which coincidentally is the same as the Series 80 BX2822 55" commercial snowblower. The manual only says to use 80-90W HP gear oil. That suggestion leaves a lot to be desired. Do I use a standard dino gear lube or would a more modern synthetic gear lube be a better choice? That is the problem with being old and owning older cars, you never have a need to learn about more modern lubricants. Please give this senior citizen some guidance, your choice of lubricant, and why.