":::Jerry::::" wrote in message
...

"Dave Plowman (News)" wrote in message
...
snip

What I'm saying is that engines last longer and longer despite even
longer
oil change intervals. Ie, the makers know what they're talking about.
Both oils and engine manufacturing techniques - and or materials - are
improving all the time, so there really is no need to change oil more
frequently than the maker's recommendation.
snip

You have to remember that makers have extended the service intervals to
appeal to the 'Fleet' / contract hire market, they don't actually care
what
the mechanics are like post X [[1] mileage as the car will have gone
though
the auction market by then in most cases.

anything from 12k to 50k in most cases

Very good point and hit the target. I did point out that cars are designed
to have a life of 50K miles before harshness is apparent using average grade
mineral oils. Use the best oils, full synthetics, in the engine and
transmission after run in, and change the transmission oil approx 20K miles
then the newness feel and sound of the drivetrain will stay for most of its
life. Service cost are designed to appeal to the company car market, who
ditch cars after 3 years maximum.

I find that in countries that do not have a company car culture, people are
more aware of using high quality lubricants in new cars as it protects their
expensive investment. Company car fleet runners in Britain don't care. In
Britain, anyone buying an ex fleet car expects the car to have been abused,
and the fleet market accounts for a considerbale share of the new car
market.