[yspert]

i've seen plenty of engines with sludge and they all have one thing
in common. lack of oil changes.
i've seen plenty of engines without sludge and they all have one thing
in common. a lot of oil changes.
i use syn in my tundra and i've got 12,000 miles on it and i've changed the
oil five times.
since you would probably never put used oil in your engine, if you changed
it today, when would you conceder the oil used?
ever heard of someone damaging their engine from changing the oil too much?
the reason for changing oil is to get the crap that gets into the oil out of
the engine.
sludge is a technical term for "build up of crap."
i always like the commercials for syn oil that says "the engineers that designed your engine don't know what the fudge they are doing."
why change it at all? why not wait till 10,500 miles? save the money.
who pays $30,000 for a vehicle and then not change the oil?

yspert