During starts and warm-ups, critical engine surfaces slide, protected by a tough, reliable film of oil between them. A hard working engine generates terrific heat, a serious problem for non-synthetic lubricants. Oil thickening and oil consumption occur when high temperatures evaporate the lighter, more volatile portions of petroleum-based oil. It resists oxidation and inhibits the formation of engine deposits. Non-synthetic hydraulic fluids are likely to oxidize when exposed to the extreme environment of tractor transmissions and hydraulic systems.
Oxidation leads to the formation of acids, varnish and sludge deposits.
This can thicken oil, reduce lubricating abilities, accelerate wear, and lead to further overheating and catastrophic component failures. You've got nothing to loose. We're taking all of the risk. The car was able to go an entire season without an oil change, something I wan't able to say before.