Service Lights Going Out After 4k ???

[magicsid]

Hi all

I have a 318is coupe 1998

My service lights on my car are going out every 4000 miles, when should be around 10000, ive had the car about 6 month and it had a full service and the lights re-set when i brought it. the service lights went down 1 by 1 quicly and told me i needed a service. i checked the oil in the car and it was like new. the car had done less than 4k, ive been told you can change the time it takes for the lights to drop and have it set at a higher millage before your lights go out, like i say i reckon probally 10k between each service

Can anyone tell me how i change this on my car please so instead of all my service lights going out after 4k they all go out after around 10k.

What do i need to do to change this ?

(think ive repeated my self too much in this..lol)

all