On Feb 27, 2006, at 9:15 AM, Ed Booher wrote:
Wait ... let me understand ... you drive 15K miles between oil
changes, without problem or worry, and feel good about it? (Meaning,
once you've verified an engine is in top shape and ready to roll in
your fleet, you trust that it's good)
Yes, Yes and Yes again. The engine does not necessarily need to be
in "top shape", but more importantly it should be consistent in the
way it runs.
Many factors can and do contribute to oil breaking down or becoming
saturated with impurities. For example a leaky injector can cause
test results to change dramatically. As long as my engines remain
consistent, I do a round of analysis, testing 3 times at 5,000 mile
increments and re-testing after 60,000 miles (in my case this equals
4 oil changes). My test results have been very close in comparison.
The 617s, build up soot faster than the 601/602s, so I think I can
safely say that they are more efficient.
Even after being here a while, I didn't know some listers were going
so long between changes. I'm a little wowed over here
Everyone who uses oil analysis to determine their oil change
intervals, raise your hand!
You'll also be surprised to see how many just blindly pour in the
good stuff and change it when they think the time is right.
Savings can be realized by extending oil change intervals when
compared to conventional oils changed at 3-5,000 miles.
I would venture to say that most here on the list have never sent in
oil samples for analysis and change their synthetic oil way too soon,
benefitting from the protection but not saving any money. Oil
analysis costs less than 1/2 of a synthetic oil change. Testimonials
anyone?
Johnny B.
I Mac Therefore I am
