it's a little under 3 litres. so if you buy those 1 lit per bottle, 3 of those should be enough, or if you buy those 1 pet 4 lit ones, can keep as extra. many workshop buat bodoh straight keep the extras for themselves.
I bought a wrong O2 sensor for my microtech ecu and apexi O2 monitor. Before that i use a unknown 1 wire O2 sensor from chop shop but it melt due to unknown reason. After that i change another O2 sensor...