hi i have just bought a bmw 325i 1993 car i live in bahrain and the summers are quite harsh here. i want to get my cars serviced 1nce for satisfaction. i would like to know after how many kms i should get the car serviced. also what are the things i should consider the most for service. i have noticed some black liquid on the top of engine where there is a cap, what abt that. can i put mineral water instead of coolant if in emergency or no. kindly help me with all that. rest the car is working perfectly fine i just wanna have service tips for bmw as this is my 1st beemer.
thanks and regards