change oil in top part of motor for injectors???

[Lyons17r]

i was told today you can change oil in the top part of the motor that its for the injectors and will make them work better, and if so how much dose it hold, and i was also told that there is another oil pump for that part of the oil???

anyone tell me how and where to change this oil, i say my truck is in desprate need..lol

[madpogue]

There have been whole online wars on this topic. Your truck uses the regular lubricating oil also as high-pressure hydraulic oil to fire the injectors - it's called HEUI - Hydraulic Electric Unit Injection. Yes, it does have its own pump, the High Pressure Oil Pump (HPOP). It's the same oil as what lubricates the bottom end and the valve train. But there's a reservoir on the top of the engine, above the HPOP, that holds about a quart of oil. It gets circulated with the rest of the oil, but when you change the oil, that quart doesn't drain. There's another quart or so in the hydraulic lines left behind. So your oil change is never absolutely complete.

You can get one more quart of old oil out by putting a siphon hose in the HPOP reservoir and sucking it out at each oil change. But that's all it does; gives you one more quart of fresh oil, and one less of old oil, each time. Some folks think that that same oil stays in the HP system forever, and that's why you MUST drain the HPOP reservoir. That's not true. Some say it's a complete waste of time to drain it. Well, that's up to you. To me, it takes only a minute and does give you a more complete oil change.

[jesilvas]

Wars is sure the right word
That's about the best description on this topic ever pogue. Congrats. And I'm not kidding.
I'll add this: The oil starts in the pan. The low pressure oil pump (LPOP) picks up the oil and sends it to one of two places. Either to the oil cooler and through the filter and the rest of the motor, or to the high pressure oil pump (HPOP) reservoir. From the HPOP reservoir it goes into the HPOP itself, into the oil rails in the heads, to the injectors, then back out into the valve covers, then the rest of the motor.
So ALL the oil gets sent through all parts of the motor, i.e. filter, cooler, HEUI system, LPOP, but not all at once. Some goes on way, some goes another, but eventually covers the whole system.

[zROCK]

Originally Posted by madpogue

There have been whole online wars on this topic. Your truck uses the regular lubricating oil also as high-pressure hydraulic oil to fire the injectors - it's called HEUI - Hydraulic Electric Unit Injection. Yes, it does have its own pump, the High Pressure Oil Pump (HPOP). It's the same oil as what lubricates the bottom end and the valve train. But there's a reservoir on the top of the engine, above the HPOP, that holds about a quart of oil. It gets circulated with the rest of the oil, but when you change the oil, that quart doesn't drain. There's another quart or so in the hydraulic lines left behind. So your oil change is never absolutely complete.

You can get one more quart of old oil out by putting a siphon hose in the HPOP reservoir and sucking it out at each oil change. But that's all it does; gives you one more quart of fresh oil, and one less of old oil, each time. Some folks think that that same oil stays in the HP system forever, and that's why you MUST drain the HPOP reservoir. That's not true. Some say it's a complete waste of time to drain it. Well, that's up to you. To me, it takes only a minute and does give you a more complete oil change.

Agreed.... I just started changing mine at oil change intervals

[Lyons17r]

Makes total sence, thanks you all! Happy strokin!