Didn't go away until I shut it off and restarted it.
Does it sometimes after sitting overnight.
Running heavier oil than normal due to 261K miles. 20-50 vs 10-30
Is it a stuck lifter or lifter not pumping up ?
Don't remember this happening when I ran 5 QTS 10-30 mixed with 1 QT Lucas. Scared me ! Runs fine !
1990 Jeep XJ 4.0 Oil is full.

 

Sticky lifter for sure.
Oil is too heavy, and Lucas is not good to use.

Switch to a 10-30 and use a Wix filter. If it persists, let us know.

And, if it does it any more, be sure to shut it right off and re-start instead of leaving it clacking away.

 

Thanks....I will switch back to 10-30 next week. I use Purolator filters. Are they OK ?
WIX 51626 O'REILLY Looks like the anti-drain back and bypass is better on WIX
Yes....I shut it right off but it was still scary.

 

in maine i run 10-40 year round with napa gold oil filters. i believe wix makes them for napa. when below zero, oil light stays on for a second or two after starting.

 

Try 5W30.

http://www.supramania.com/aehaas/

 

Made by Champ labs who makes them for Royal Purple , Bosch USA , K&N

 

Wix made by Champion Labs?

 

Pure oil now pure oil later.
I use them cause David Pearson drove the Purolator Mercury and always won it seemed.

 

He had to change out the engine after every race.

 

When Andy Granatelli ran the STP Indy cars, someone in his organization confessed they only used STP in the trannies!!!!

 

I saw him run several times at Atlanta and a few times at Talladega.
The first time was Atlanta In 1969 and the last time was sometime in the early 80's.

We always called his car the "Percolating Mercury".

He was (is) one of the all time greats.