The drivers of the five cars and 10 pickup trucks were arrested on charges of oil smuggling. Officials said the vehicles had their tanks modified to increase capacity.
The vehicles were stopped from 4am to 7am. The officials said they seized 4,195 litres of benzene and 940 litres of diesel and each vehicle was carrying about 200 to 500 litres.
The customs officials said the petrol price in Malaysia is Bt19 per litre and the smugglers sold it in Thailand for Bt23 to B24.