Ferrari 308 GTS/GTB/GT4

Coolant capacity & service interval

Ferrari 308 GTS/GTB/GT4 coolant capacity is 18 liters. The service interval for coolant is 12 months. The data covers 3 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

Type	Specifications
308 GTB (1975-1984)	Use: Normal Capacity 18 liter Change 12 months
308 GTS (1975-1984)	Use: Normal Capacity 18 liter Change 12 months
308 GT4 (1974-1980)	Use: Normal Capacity 18 liter Change 12 months

The Ferrari 308 GT4, 308 GTB, and 308 GTS all share an identical cooling system capacity of 18 liters, indicating a full system fill rather than a partial service top-up.
An 18-liter coolant capacity places the 308 series among higher-volume cooling systems for sports cars of the era, reflecting the thermal demands of a mid-mounted V8 engine.
The 308 GT4 carries a production span of 1974-1980, while both the 308 GTB and 308 GTS span 1975-1984, yet all three share the same 18-liter cooling system specification throughout their respective ranges.
A 12-month change interval applies to all three variants under normal use conditions, meaning coolant renewal is tied to a calendar year cycle rather than a mileage threshold.
The consistency of the 18-liter capacity and 12-month interval across the GT4, GTB, and GTS suggests the cooling system architecture remained uniform despite the body and configuration differences between the 2+2 GT4 and the two-seat GTB and GTS.