<VV> Required oil practices

[BBRT]

My son, Mike, recently changed all 8 injectors on a 550 Power stroke diesel 
(at $600 each). They use a high pressure oil pump to assist fuel injector 
control.  It is my understanding one must be faithful to oil and oil filter 
changes as well as air filters, or they clog? up. The truck wouldn't start, 
especially in cold weather.  Now truck runs as it should. Lesson is, change 
whatever is required to keep oil clean.  Both filters-air and oil, even if 
you use the "replace oil as leaked" method....;>)

Chuck S
BBRT
----- Original Message ----- 
From: <Thesuperscribe at cs.com>

> Billy Ray,
>
> I'm not an engineer but I write about this stuff sometimes, so I'm 
> guessing
> that the old guy's don't-drain-but-change-the-filter practice worked 
> because
> the oil stayed pretty clean. > Some truckers now go much farther between 
> drains by using bypass filtration
> -- an extra filtration device which continuously cleanses small amounts of 
> oil
> so that eventually all oil in the crankcase is purified. Oil analysis 
> confirms
> that such oil in a big on-highway diesel can go 25,000 to 50,000 miles or
> more without change. However, filter elements are changed periodically.

...... But he did change the extra filter element (basically tightly-wound
> paper toweling in a cannister) about every 12,000 miles and poured in a 
> gallon
> of oil to make up what the dirty element took out. He was also careful 
> with
> his air filters. Regular analysis showed all levels of impurities, 
> including
> wear metals, were well within safe limits.
>
-- and leak five
> to 10 quarts of oil, which of course I replace with new oil. So, ha ha, 
> it's
> getting an oil change every 500 miles, and I don't need oil analysis to 
> tell me
> that the engine's almost certainly safe.
>
> Now, when I get those O-rings replaced on the pushrod tubes....
>
> --Tom Berg