I agree with ddicky, evidently Vacuoline 1400 series is formulated more akin to the old Vactra #2 with a higher amounts of tackifiers which makes it stick to the ways longer. It is also rated for gearboxes/hydraulic systems, along with sliding surfaces. With the 1409 you can feel the tailstock float on the oil when moving it, the standard Vactra#2 you could feel more resistance after you slid the tailstock a few times. On the ERL/RML/TRL series the way oil is pumped from the carriage to the ways. Bottom line just about any ISO68 oil will work, I just would pump the way oiler a bit more frequently using plain gear oil. Wear will not be an issue under the type of use a hobbyist will subject the machine to. The 1409 also worked well for open Norton style gearboxes. It is sold from oil distributors, the smallest stock size is 5 gallons, I picked up mine from a local oil distributor.