<VV> Re: Curious oil practices

[Ron]

There's nothing curious about bypass filtration, it was standard procedure 
in the 30's.  My dad's '38 Nash had a bypass filter that used a replaceable 
cartridge and I have a '50 Nash with a bypass filter.  Also, all of those 
toilet paper filters that were popular in the 40's and 50's were bypass 
types.
RonH

----- Original Message ----- 
From: <Thesuperscribe at cs.com>
To: <virtualvairs at corvair.org>
Sent: Tuesday, July 05, 2005 7:52 PM
Subject: <VV> Re: Curious oil practices


> 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. Three thousand miles in moderate to 
> light-duty
> service was/is not enough to wear out the oil, and changing filters at 
> that point
> was enough to take out any accumulated dirt, etc. Adding a quart or so at 
> that
> time replenished the additive package while further freshening the oil in 
> the
> crankcase.
>
> 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.
>
> In 1980 or so I did an article about a guy who ran a few dump trucks but
> didn't want the mess and oil-disposal problems from frequent changes 
> (10,000 miles
> was then a common  drain interval, and some still do it that often). He 
> had
> one Cummins 855-cid-powered truck that had gone more than 400,000 miles 
> without
> a drain. 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.
>
> Right now I am doing essentially the same thing with the 110 engine in my 
> '64
> Monza. I haven't drained the oil in several years, but do change the 
> filter
> about once a year. In a year I drive maybe 500 to 1,000 miles -- 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
>
> ***
>
> In a message dated 7/5/2005 6:04:03 PM Pacific Daylight Time,
> virtualvairs-request at corvair.org writes:
>
>
>> Date: Tue, 5 Jul 2005 19:15:46 -0500
>> From: "Billy Ray Richter" <brichter at gtcom.net>
>> Subject: <VV> curious oil practices
>> To: <VirtualVairs at corvair.org>
>> Message-ID: <200507060015.j660FlFw002938 at tiger.skiblack.com>
>> Content-Type: text/plain;    charset="us-ascii"
>>
>> I spent 35 years in a paper mill.  Lots of lubricants and oils 
>> especially.
>> Lots of funny practices concerning oil in vehicles among fellow 
>> employees.
>> One fellow never changed oil, every 3000 miles he changed filters and 
>> added
>> oil back to the full level.  I knew him 30 years until he died and he 
>> never
>> had problems with his oil.  Kept his cars for years and always had over
>> 100,000 miles on them.  I never had the nerve to try this.  I always had 
>> a
>> lot of fun telling the oil vendors who visited me about his oil filter
>> changes.  We used synthetics in gearboxes that were in extremely hot
>> environments and always lowered the temperature by at least 20 degrees. 
>> The
>> reps from the oil companies always told me that if you went to synthetic 
>> oil
>> after you had used dino oil for some time then the vehicle would probably
>> start using oil.  Something to do with cleaning out the gunk sealing 
>> cracks
>> and crevices.  The only thing consistent about oil recommendations and
>> theories is the inconsistency.  No one seems to agree on any one 
>> procedure
>> or superior oil.  I just use a good oil and change it regularly.  Try to
>> keep the temperature down and don't burn it.
>>
>>
>>
>
>
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