From: Willy on 28 Mar 2007 18:30
"SnoMan" <admin(a)snoman.com> wrote in message
> On Wed, 28 Mar 2007 03:10:20 GMT, "Mark Jones"
> <noemail(a)mindspring.com> wrote:
>>I have been doing 5,000 miles on my 2004 F-150 and
>>plan to continue doing it that way. Oil quality has been
>>greatly improved to the point where 3,000 miles is now
>>a waste of money. The only time that I might consider
>>a 3,000 mile interval is if my truck was driven on a
>>construction site with a lot of dirt in the air.
> Quality does not prevent it from getting dirty and it is the dirty and
> acid that build up in oil and that cannot be filtered out that
> requires the change. Also most conventaion oil start to break down
> with a viscosity shift by 3K miles or so and if you did a flow test on
> you modern conventional oil after 5 K vs new you would likely be
> surprized and rethink this whole thing. New engine are harder on oil
> than ever these days.
You've been researching propoganda my friend - conveniently provided by the
folks that sell you the product.
From: HLS on 28 Mar 2007 19:03
"Willy" <willyk(a)prodigy.net> wrote in message
> You've been researching propoganda my friend - conveniently provided by
> folks that sell you the product.
We have no proof either way, Willy. Claims are just claims, no matter if
they recommend 1000 miles
or 12000 miles between changes. Let's see some REAL data, not just claims.
I did some spreadsheet modeling of the amount of gasoline we would burn in
100, 000 miles, at
various engine efficiencies... The results surprised even me. A car that
gets 12 miles per gallon
will burn over 8300 gallons of gasoline in that period of time, or more than
A car that burns half that ( 24 mpg, which is not too hard to get) will
save over 4000 gallons
of petroleum during that period. About $10,000 worth.
The difference between changing your oil at 3000, 5000, 75000, or even
10,000 miles reflects
as a relatively small savings of petroleum. For example, if you change oil
at 3000 miles, you
use only 41 gallons of petroleum over that same 100,000 miles. If you
change at 7500 miles,
you use only about 11 gallons of petroleum.
Now, if you really want to kick the Islamic oil interests in the cashews, do
you do it by
worrying about motor oil, or gas guzzlers??
From: clifto on 28 Mar 2007 19:11
> Well that certainly shoots your argument in the foot. Irv Gordon
> attributes the 2 and 1/2 million miles on his volvo to 3000k oil
Are you saying he's not going to change his oil for another half million
miles, or that he's changed it more than once per mile driven?
Pork: It's the other white flag!
-- James Lileks
From: SMS on 28 Mar 2007 20:20
> You've been researching propoganda my friend - conveniently provided by the
> folks that sell you the product.
Precisely. There has never been a single study that shows any benefit
from 3K oil changes versus 5K-6K oil changes. In fact, all the oil
analysis studies show virtually no difference in the contaminants or
loss of lubricating properties between 5K and 6K.
The marketing departments of Jiffy Lube love people that are gullible
enough to change their oil far more than necessary.
From: SMS on 28 Mar 2007 20:23
> Now, if you really want to kick the Islamic oil interests in the cashews, do
> you do it by
> worrying about motor oil, or gas guzzlers??
The two are totally unrelated. The cost of gasoline, whether it's low or
high, has no bearing on the fact that 3000 mile oil changes are
unnecessary. You won't find any oil study anywhere that has shown a
benefit from changing your oil so often.
If you believe that 3000 mile oil changes are necessary, why not 2000
mile or 500 mile? After all, oil is only about $1.75 quart, and good
filters are about $4. You can do an oil change at home for about $15.