How much should one cost? Which are good systems? Any good website recommendations?
diesel mechanic my whole friking life, and I'd been telling evreybody,everyday,my whole life. NOT FRIKING ADDITIVES ON DIESELS.
The only additives to be used are for cold weather and for prolonged storage.
Depends on the age of the car, modern cars don't need alarms as they have security built in that is impossible to bypass. Waste of money if it is a modern car, just keep an eye on your keys. That's why millennium burglaries are so common as they steal the key to take the car.