On Mon, 08 Oct 2007 04:04:23 GMT, "My Name Is Nobody" >
wrote:

>
>"WindsorFox" > wrote in message
...
>> Michael Johnson wrote:
>>
>>> I don't know exactly what our landfill does with the oil but I'm sure it
>>> isn't discarded either. Personally, I think changing the oil every 3,000
>>> miles is more important than using high dollar synthetics. Changing it
>>> regularly flushes out contaminants and for most users provides more than
>>> adequate protection. Maybe some vehicles that see extremely cold weather
>>> benefit from the better viscosity properties of Mobil One or other
>>> synthetics.
>>
>> If you have a good filter there should be no need to flush any
>> contaminates and a simple drain and refill isn't much of a flush. I did
>> flush my Mustang when I changed to synthetic, or I should say real
>> synthetic. The crap left behind by 5 years of Castrol GTX was truely
>> astonishing.
>>
>>>
>>> My truck doesn't burn (or leak) any noticeable amount of oil between
>>> changes and it has seen a variety of brands (i.e. whatever is on sale by
>>> the case at Costco) for as long as I have owned it. I don't even use
>>> Ford filters all the time. If anyone really wants to do their engine a
>>> favor then just change the oil regularly. Same goes for the automatic
>>> transmission which, IMO, is the most neglected component in most vehicles
>>> today. I change the fluid and filter in the Explorer every 30k-40k miles
>>> and am still running on the original transmission which, for an Explorer,
>>> is quite an accomplishment at nearly 200k miles on the odometer.
>>
>> Now riddle me this. If you insist on changing the motor oil at 3-4k
>> miles, why are you comfortable with changing the ATF at 40k with no time
>> limit? ATF is put through just as rigorous usage if not worse than the
>> engine oil is and I've seen ATF described as "The most complex compound
>
>There is NO COMBUSTION going on in your automatic transmission, the
>contaminations involved is orders of magnitude less...
>
No combustion, but lots of friction and more wear than in an engine.
The mechanism is also orders of magnatude more sensitive to
contamination, with the clearances in the valve bodies being EXTREMELY
close. Not as critical on today's electronic transmisssiona as on the
old "hydraulic brain" but still critical.

There is also a LOT of heat involved, which causes oxidation of the
fluid, just like combustion. You definitely have less acid production
and dilution - but it is, as I have repeated several times, still
CRITICAL.
>
>
>> fluid used in any automotive application." Also consider the filtering (or
>> general lack there of) done in an auto trans. Most I've seen consist of a
>> felt like substance similar to a bypass filter but are way smaller in
>> surface area and you always have a lot more metal filings in a trans than
>> you do in an engine.
>>
>>
>>
>> --
>> "Are you da poe-lice?" "No ma'am, we're musicians."
>>
>> "So round, so firm, so fully packed, so easy on the draw" - Daffy Duck
>>
>> "Too bad it wasn't "personality theft"...you'd be immune." - Herb Tarlek
>


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