:D :D our petrol is not that dirty until need to use double filter. Besides, if u really want to use double filter, use back ur car's original filter. Motorcycle's petrol filter is too small, just think of bomba high pressure water pipes but using small tap, so water come out also too small. My recommendation, just stick back with using single filter. Some more ur car is carburetor car, so u dun need to worry too much on dirty petrol clogging up things like fuel injector.