With 128,000 miles on the car, I would think that you most certainly have
combustion products blowing by the rings in sufficient quantity to cause the
black oil. A spin on filter will not fix this - new rings might.
-----Original Message-----
From: Robert Carley <rcarley@uoguelph.ca>
To: triumphs@autox.team.net <triumphs@autox.team.net>
Date: Tuesday, September 14, 1999 12:41 PM
Subject: dirty oil
>
>To all:
>
>I am still having problems with the oil in my 73 TR6 turning black after
>a few hundred miles of driving. I use 20-50 oil of good quality and the
>original cannister filter. The engine has approx 128,000 miles on it,
>with good compression. It leaks oil out of the rear main seal, but not
>anywhere else.
>
>No matter what brand of paper filter I use, the oil will not stay clean
>for long, and I don't like to drive with black oil, thus I end up doing
>oil changes too frequently.
>
>Some listers replied to my last question on this by stating that
>switching to a spin on filter would help. However, I am wondering if
>there are other causes. Could it be too much 'gunk' on the bottom of
>the oil pan? Air filters not working properly? Just an old engine that
>needs rebuilding? (although the oil pressure is great with very little
>exhaust smoke).
>
>Would flushing the engine help?
>
>Any help before I go out and buy a spin on oil filter adaptor would be
>appreciated. I prefer to go with originality, and don't mind the old
>cannister filter arrangement, but...
>
>Thanks
>
>Robert Carley
>73 TR6
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