Re: [DML] Low Oil Pressure @ 10W30

["content22207" <brobertson@xxxxxxxxxxxx>]

DeLo problem is in the sender, not the dash gauge. Mine was woefully
inaccurate until I replaced it with a vendor's xRef, which does drive
the gauge properly but unfortunately weeps oil at the spade connector
(despite my best efforts to seal it externally with every product
imaginable).

Note that generic senders won't drive our dash gauge correctly because
they are usually calibrated to 100 max PSI.

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, Scott McMullan <smcmullan@xxxx> wrote:
> 
> I described this issue over the summer in detail on this list, using a
> different email address.
> 
> I had my oil pressure gague's accuracy tested, and it was fine.
> 
> As long as I have 20w50 in there, everything works according to spec;
> pressure reads in the normal range and behaves as expected (needle
> just about horizontal at idle, and near the top of the range when
> running pretty much anything over 1K RPM.
> 
> If I put lighter weight oil in, about 10 minutes after the engine is
> at normal operating temperature, oil pressure at idle reads less than
> half the normal idle pressure, and the longer I run the lower it goes,
> almost reading zero after 45min or so of driving.  With the engine
> over 1K RPM, the pressure is on the gague, but lower than normal.  The
> oil pressure light NEVER comes on when the engine is operating.  I had
> 10W30 in there, then moved to 10W40, with no noticable improvement. 
> Change oil back to 20w50, and the oil pressure starts behaving
> normally (although it was funky for the first 150 miles, like it was
> working its way back to being OK).
> 
> While the engine was generally louder than normal with the lighter
> weight oil, I don't recall any specific clattering that sounded
> "wrong".
> 
> Maybe my engine had bad internal wear, I really don't know.  But I
> *never* have any problems starting in the cold.  It was near freezing
> on Thursday morning, and the engine fired right up on the 1st try, as
> always.
> 
> I have never found anyone who could give me a good reason for this
> behavior, I was just guessing at the oil pump.  One shop I consulted
> when I first started having this problem (a friend of mine works
> there) tried to tell me that the engine was probably shot, and putting
> heavier oil in wouldn't help the symptom.  I found that hard to
> believe with about 60K KM on the odometer... glad they were wrong.








To address comments privately to the moderating team, please address:
moderators@xxxxxxxxxxx

For more info on the list, tech articles, cars for sale see www.dmcnews.com

To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/dmcnews/

<*> To unsubscribe from this group, send an email to:
    dmcnews-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/