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Mocal OT/1 Thermostat 1/2
  • Mocal OT/1 Thermostat 1/2
  • Mocal OT/1 Thermostat 1/2

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Prolonged use of a car engine in conditions where the oil cannot reach its correct working temperature will cause sludge formation and crankcase oil dilution, leading to excessive wear especially in the cylinder bores. Optimum engine power will only be delivered at correct temperatures. The elimination of drag in engines caused by cold oil is a most important consideration, especially with a racing engine, revving the engine without a load will not put much heat into the oil and devices for preheating the oil may not be available.

It is therefore desirable to control of the oil flow through the cooler by a thermostatic device, we call an oilstat, set to divert oil to the cooler at 80°C (although a wide range of settings is available for special applications). This is the minimum temperature required to evaporate and dispel contaminating substances.

Mocal Oilstats

Can be built into the oil cooler take off for most engines with spin-off filters, they add nothing to the thickness of the plate.

Are available as a separate unit to be fitted into the oil lines. Two sizes of oilstat for in line fitting are available.


Supplied with push on fittings for 1/2" bore hose only and is designed for smaller engines with relatively low oil flows.