I'm afraid Jim is correct. The only other thing outside of oil clearances, bearings, lifters, is a skyrocketing oil temp. It would certainly exacerbate problems in a worn engine. A severely sludged cooling system could cause your oil temps to go up excessively because engine heat would not transfer to coolant as readily. I would start with an oil temp and oil pressure gauges. 

Chris.

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Dnia Sep 4, 2014 o godz. 16:42 Jim Felder <jim.felder@GMAIL.COM> napisał(a):

> Replacing the oil pump has helped me with these symptoms. But,
> replacing/rebuilding the engine is inevitable now.
> 
> Jim
> 
> 
>> On Thu, Sep 4, 2014 at 3:08 PM, Ryan Perry <rjdperry@gmail.com> wrote:
>> 
>> Hey Listers-
>> '84 WBX Manual with 190K original engine
>> 
>> Van for the most part runs well, bit of a loping idle and off idle bog but
>> runs decent at revs. Certainly not the strongest but it gets me to the
>> campground an hour away and back without issue.
>> 
>> Lately when I am coming off of highway and down to idle the oil light
>> starts to flicker. Sometimes more, sometimes less.  I have noticed that it
>> is getting worse, used to only happen when on highway for an hour or so and
>> running fast, now it seems to happen after maybe 15min no matter what speed
>> I drive.  If I am just driving around town it never happens, no problems
>> whatsoever.
>> 
>> I have been running Castrol 20-50 synth with Napa Gold Filter but just
>> changed to Castrol 30 dino with a bosch filter.  No change, in fact I
>> believe it has gotten worse. Oil level is just at or below half where I
>> have always kept it.
>> 
>> So I am wondering what might be some good next steps?
>> Anything quick and easy that can be checked?
>> Was considering getting a Van Cafe oil pressure gauge kit but they are all
>> out.
>> How about the pressure relief spring?
>> Maybe go to a higher oil weight?
>> 
>> I live in Asheville, NC and temps are right at 80-85 and lows around 60.
>> 
>> thanks ya'll for any help you may have!!
>> ryan
>> 
>> 
>> 
>> Ryan Perry
>> 84 Westie "Artie McParty"
>>