On Sun, 12 Oct 2008 19:42:25 -0700, "Hawke"
wrote:


"Christopher Tidy" wrote in message
...
Steve Lusardi wrote:
Karl the clearances are much tighter on today's engine. Oil pressure is
the
indicator of "potential" flow, but it's all about flow. If the viscosity
is
too high, flow will be reduced, because when there is enough pressure to
lift the ball from the seat in the regulator, that will represent an
easier
path and pump flow will be directed through the regulator and not the
rest
of the engine. Use the viscosity the factory recommended. They built the
engine, not your son.

I agree with Steve. In the short term you'll probably get away with it.
In the longer term you might not. Not worth the risk in my view.

Best wishes,

Chris

Take the risk! Because there really isn't any. Oil these days is pretty darn
good and it's rare indeed for a motor to fail due to a problem with the oil.
In fact, the problem is almost never the oil but the lack of changing it
regularly enough. If you have a good quality oil it'll work fine with most
engines. That said, I would go with Shell Rotella T Synthetic. It's a 5W40
oil and it's designed specifically for diesel engines but it just happens to
be good for just about everything else too. Diesels have higher requirements
than standard gasoline engines so the oils for them are better in general.
The Rotella T Syn is great stuff. I use it for my motorcycle too. I read a
long and complex article all about oils and aside from going with a full
synthetic oil, which is very expensive, the best thing you can buy is
Rotella T Syn. If I was going to buy a drum of oil that's what I'd buy.

Hawke

My recommendation would also be Rotella T. Depends where you are and
how cold it gets whether the synth is an advantage (OK, always better,
but not necessarily ENOUGH better to make it adviseable) for you. In
the southern states you could very well get by with 15W40 conventional
all year round on all your engines - but 5W40 will definitely do the
job for all of them.

The ONLY thing to be carefull of with "all fleet" oils is some still
have zinc in them at higher levels than recommended for todays
gasoline engines (which is really only an issue if they are burning
oil) The new api spec only applies to 5 (or 0)base oils (and possibly
10W30), not 15 base and above. Why? becuase 5 base oils are more
likely to be consumed, depositing the zinc in the catalytic converters
which would possibly cause them to fail before 100,000 km.
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