Home Forums Hunting & Shooting Hunter's Campfire 2002 F250 7.3 w/ 121k

Huh?

Changing the oil in the high-pressure oil pump reservoir it’s a questionable practice. Google it come up with your own evaluation. I personally have Not done it to any of my 7.3’s. Not saying it’s bad not saying it’s good.

Exactly...

With no new truck, mechanical issues, mostly emission driven.

I looked into it. Never heard about that before.

Makes no sense at all to do that. WTH would you bother? As long as you are changing oil regularly.

I personally don't run oil changes longer than 6-7k at the max. Shoot for 5k.

I looked into it. Seems like I read something about an absurd volume of oil being pumped through and replenished for every gallon of fuel burnt.

So I am just going to change the oil old-school style.

I did not write this. This is cut and pasted, but I have numerous articles and posts similar to this. There’s nothing wrong with doing it. I just think it’s a waste of time, But if it works for you by all means do it.

Here's how the system works, and why what you're doing is just fooling yourself that you're being "Extra Good" to your engine. The moment the engine starts the LPOP (what's supplying the engine with oil) pumps oil into the HPOP reservoir at a rate Many times higher than the HPOP is using it. Maybe 10% of that oil is going to the injectors and 90% is overfilling the res and, thru a standpipe 1" down from the lid, flowing right back into the pan. That 10% going to the injectors (at idle) is being ejected out of each injector and Also going back into the pan. Every ounce of oil in your engine is the Same oil, it's All been thru the injectors countless times, it's All been in the reservoir and overflowing it constantly as it runs.

There is simply No Way of Ever draining your engine of oil when doing a change (the reason you see it darken is because there's still a quart or two that didn't drain). There's oil in the Valley, the Heads, the Oil Cooler (lots there actually), and the HPOP. You're making an insignificant difference during a change when draining and refilling it (you could actually refill the entire 15qts thru that little hole in the lid, just keep pouring-it-in, it'll go down the standpipe and into the pan)..,

I'd never heard of changing the HPOP oil either. BUT one thing I did with mine way back many years ago is add the HPOP cross-over hose that ties the rails together allowing the pressure to equalize between them. I believe that to be a worthwhile add on.
My '01 has 206,000 miles. I can't imagine ever selling it. The replacement cost is out of control.

I know some swear by it, and others think its a waste of time.

I decided to try it and the oil in the HPOP was darker and thicker than the oil in the pan.