"Doctor Evil" wrote in message
news

Capitol Wrote:
Dave Plowman (News) wrote:-
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.

So use the maker's recommended oil and service intervals, and don't
thrash
the engine until the oil is hot, and the engine will outlive the rest
of
the car, in most cases.
-
Unfortunately, this is not the experience of the fleet users. They are
whingeing regularly about having to fit new engines at 40K miles when
extended oil changes are used.


My nephew ran a largish fleet of Cavaliers about 14 years ago. The
drivers regularly trashed the camshafts. They would start up on -3 in
the morning and rev like mad and tear out of the car park. Many were so
dumb, they would rev staright to 4,000 revs thinking it would warm the
engine up faster. All it did was ruin the engine in the process. I
suggested he try some Mobil 1 at the first service. In those days, I
thing there was a 1,500 mile service, or walk around checkup. He said
he would have a go and get them to change the oil at an early stage, as
it would cost him nothing. The service agent would bend over backwards
to keep the luctrative service business. Not one camshaft failed after
he started using Mobil 1 in the cars. He thought it was wonderful as a
car down for a day or two or three meant needless stress all around.


It was very common, almost to common a fault back, IIRC Vauxhall had to do
some work on the engine design, now the engines run quite happily on the
recommended oils. Again IIRC it wasn't a case of the wrong lubricants but no
lubricants that caused the problems, it would not have nattered what oil was
being used....