gday got my radiator flushed yesterday in my vx calais 5.7, as it had the green coolant in it when i bought it but when i got it back last night on the bill it says they only put 2.5 litres of coolant in and i thought 5 litres was meant to go in, so now im a bit worried they either didnt flush it properly & only did the radiator and left green stuff in there or just didnt put enough coolant in, would it matter if they only put 2.5 litres in