To which level should the coolant reservoir of the Buick GL8 be filled?

[HarmonyFitz]

The Buick GL8 coolant reservoir generally requires about 3.5 liters. There is a dipstick scale inside the radiator, and the coolant should be filled up to the horizontal line on the dipstick. Alternatively, the coolant can be filled to the middle position between the upper mark (MAX) and the lower mark (MIN) on the scale. The middle of the scale is the most appropriate level, neither too low nor too high. Coolant prevents components from system failures, cracks, and other issues due to cooling problems in cold weather. It also manages rust prevention and prevents excessive scale buildup that could lead to pipe blockages. It has functions such as anti-corrosion, anti-scale, anti-boil, anti-freeze, and anti-rust.