its a n reg,now sometimes when its been a eally cold night and i come to start it in the morning,the first start of the day-i turn the key the usual engine fireing sounds then a noise something like a der,der,der,der,dr happens,then stops,it will not do it again then for the rest of the day,like i said this normaly only happens now and again and when its been a frosty night.what might it be ?
the car always starts still with relative ease and the der,der,der,der,dr noise stops after maybe 3 seconds..does this sound serious?

For a 11-12 year old car, it's not an unusual symptom. And it's nothing serious either.

Just make sure you use a good quality synthetic oil. For cold temperatures, I would recommend you to use the Castrol 0W-30 or Mobil 1 0W-40; and use good quality (unleaded 98) fuel.