Yes, it will work on old cars and even brand new cars. Gimme an sms (016-6960886) and we can met up and install on your car and you can test drive before deciding to purchase it. If you dont feel anything at all, I will remove it at no charges to you. (You can come over to Cheras Giant's Tmn counnaught)
Actually most units are sold thru my regular workshop (mechanic) to their regular customer and feedback are very impressive. Few iswara owner are in shock and unbelieve that this solve their "hard starting" problem. And few hyundai cars are getting incredible mileage increase plus better aircond performance even during noon. And lots more with different cars. We even have unit for scooter and motorbike and supplier to motorbike shop in cheras area.
Yea, the 2 wires are connected to the battery of the car/bike. Just like that. Simple.

How does it works?
Simple. Its like Diamond water filter, it have 7 phase filteration inside plus a pulse generator inside which filter and maintain a proper clean voltage across the whole circuit of the car. Current and voltage spike cause alot of interference into the car electronic and causing power loss and bad fuel consumption. Its hard to explain but its sort of like storing the energry and filtering plus plusing the circuit to optimum performance.