97 1fzfe hot oil pressure

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haha yea I'm wondering the same thing!! must have been very well taken care of.....
Mine runs about the same with 20-50 high mileage Castro oil. 280k miles.
And very well maintained
 
What grade oil?
Delo 10w30

During the baseline I removed the pressure regulating valve and cleaned it in a sonic cleaner. Not sure if this contributed but that is the lubrication maintenance I did then.
 
Delo 10w30

During the baseline I removed the pressure regulating valve and cleaned it in a sonic cleaner. Not sure if this contributed but that is the lubrication maintenance I did then.
is removing the pressure regulating valve a popular thing? first time I've heard of this mod....
 
is removing the pressure regulating valve a popular thing? first time I've heard of this mod....
Not a mod, it’s just a spring and piston. I removed and cleaned of any oil varnish so it operated as new.
 
Another reference, hot and at highway speed.
Time an interior cleaning also.

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