Dave ST- Why do you think ford (and every other car manufacture) state the service intervals at 12,000 (ish) ?
Steve1981- you hit the nail on the head mate.
They state service intervals at 12,000 etc because that is when the oil needs changing. If you rag your car round a track every now and again...it still only needs changing at approx 12,000miles. The viscousity of the oil is designed to lastfor a minimum of 12,00miles...if it wernt then dont you think that dealers would love to shorten the inteveral to make more money?
Also, with regards to warrenty, dont you think that if leaving your oil changes to 12,000miles would damage or shorten the life of the engine do you not think ford would shorten the interval to avoid paying out on warrenty??
I have to make my point about this, Im a mmechanic and I know what Im talking about....changing your oil so frequently is just pointless!! ( and a waste of £30 quid!)
Also for the chap who doesnt change his oil filter but DOES change the oil... why dont you change the filter? Fragments of dirt etc will be washed straight back into the system from the filter! LOL
Sorry for ranting...rant over.
Bish
_________________________
Used to have: Fiesta 1.3LX, BMW 318iS E30, BMW 323i E36 and now a brand spanking new Fiesta ST.