DML,
To pre-defend myself, I change my oil per the Bschedule (3000miles) but...
My dads new 65 barracuda (273 v8) had its oil changed religiously every
120000 miles with 30 weight single viscosity. The car gave flawless service
for 275,000 miles before the transmission gave it up. The oil consumption @
275,000 miles was about 1 quart every 3000 miles. Newer engines have
tighter tolerances and possibly (unfortunatley) less costly materials,
but... I thought oil filters only filter a portion of the oil on every pass
and bypass the majority and do nothing to filter out the acids caused by
breakdown of combustion process. With loose tolerances in the OLD 273, I
would expect more combustion by products in the oil than newer engines with
tight tolerances. given equivalent filtration, in my mind things are not
adding up... Im not saying dont change your oil (Better safe than sorry)
but personal experience says somethings not quite right.
Bruce
At 09:17 AM 7/23/98 -0800, you wrote:
>>SNIP<
>>planes have an oil analysis performed every 25 hours or Oil change
>>whichever occurs first, and I have performed the oil analysis on both
>>trucks. With the
>>oil saturated air filters, the oil has less contamination then with
>>conventional paper elements. I suspect the tests that were posted
>>earlier were flawed,
>>possibly the elements were not sealed correctly in the air filter
>>housing. Anyway, those are my thoughts on air filters.
>
>Personally, I go along with the consensus that under normal driving it
>really doesnt make a difference what type of filter you use (regarding
>engine wear). My old truck, a 1988 Nissan has 230,000 miles on it and has
>had maybe a dozen air filter changes in that time.
>I always used the regular paper type (Fram). I realize that the K&N style
>gives greater airflow and I dont know how much dirt and dust one runs into
>when flying but if I were driving in primarily dusty or dirty conditions
>I'd have a serious concern that along with that extra air comes more fine
>particulate matter. Whether that small a particle will have a noticable
>effect on engine wear I dont know but why take the chance. I suspect that
>the frequency of ones oil changes plays a more prominent role in the life
>of an engine than does that of the air filter. Just go ask the guy who does
>the oil change every 1500 miles!!!!!!
>
>Tony J. Mastres
>Photographer
>Photographic Services __
>1120 Kerr HAll UCSB []_.-' (Q,___\
>Mastres@id.ucsb.edu *******`(o) >>>}__(o)s>
>
>
>
>
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