What is the normal oil use of your trucks? I am using about 1 quart per 1000 miles. I have no engine oil leaks other than about 2 drips from the CCV. I routed the CCV hose over top of the brake master cylinder which I thought was to keep the oil inside the motor. I can't see where the 2 drips could add up to 1 quart per 1000 miles. I also replaced the injectors about 2-3k miles ago so I can't see where it is the injector o-rings. Also was using oil like this before I replaced the injectors. There is 207k miles on the truck.

 

Um, I may need to knock on wood after saying this, but since mine doesn't use any oil I'm going to go ahead and say that zero oil use is "normal." Now what's "acceptable" may be different for different people.

 

I'm not currently losing any with 225k. But, I've heard 1-2 quarts per change is a normal level. Lots of guys have to add between changes, but I haven't on Tex yet, and only did a couple times on Gus, but he leaked like a new oreleans levy.

Keep an eye for oil in the filter anyway, I took out the sticks in Tex and several didn't seat right from when the PO did them. (Assuming he had them done and it wasn't factory rings. )

 

So if I was getting oil leak by the injector o-rings, I should be getting some blue smoke, correct? The only time I get some smoke is on cold starts, below ~35F, for about 1 minute or less.

 

I change my oil at 3K miles and don't have to add any at all, don't even see any change on the dipstick. ~ 163K on my truck

 

Both of my trucks have always used about 2qrts/oil change (4-5k miles). I never add oil. Even my new engine has about the same rate of consumption. UOA's have always been in the normal range for wear/etc.

The exception was running an AIS with Stage 1's and a 38R. I went through a gallon of oil in 1000mi while towing the Toy Hauler. Oil consumption was not that bad, but still elevated when driving empty. Went back to the (presumably less restrictive) 6637 and oil consumption returned to 'normal'.

Currently venting CCV to atmosphere with the S366 charger. We'll have to see how oil level is affected by this change. (I can't stand CCV to atmosphere - this will be getting fixed )

In theory, ALL piston engines consume some oil. The cross-hatching on the cylinder walls is designed to hold some oil and provide lubrication for the rings. This oil loss can be compensated by adding soot and fuel to the crankcase during cold-start when the rings are not fully seated yet (they need some thermal expansion).

Short-trip engines that never see operating temp can see an INCREASE in oil level due to acquiring moisture from condensation. I stole a 2yr old '97 4Runner off a dealer lot one time because it had milky oil under the oil fill cap. It had been on the lot (in FL) for 45days, and I was gambling the water-contamination was due to just being moved around the lot and not being driven up to operating temp. I made them feel good about giving me $7k off their 'best price' and put 100k miles on that thing without ANY problems.

 

Not necessarily. But the fuel filter will turn black for sure.

 

What oil are you using ? Mine would use 1 1/2 qt very 5k with delo and motorcraft

 

I don't use any. Now, if I fill to the top I will lose a little over time. But if I leave it a little below the full line it stays there for 5k miles. If you don't add that quart, does the loss stop? I have heard this is not uncommon.

 

I can understand and would think it would use a touch more oil when cold. I have pulled the filler cap off and turned it upside down on the filler neck. It does not blow it off, just vibrated off after about 10 seconds.

 

Schaeffers 9000 5w-40

 

I have not tried it. Checked it this morning and it was about 1/4" from the bottom of the dipstick. I topped it off.

 

In ten years of owning my truck and 175k miles, i have only had to add a couple of quarts on one oil change interval. That being said, I typically check the oil and make sure it is in the normal range on the dipstick. I run 6k - 8k oil change intervals and have not seen an issue with oil consumption or leak.

 

Ok so now this is bothering me. I wonder where this is all going then. Any ideas?

 

Here is a video of the vent cap flipped upside down to show engine blow by: http://s486.beta.photobucket.com/use...A7F6D.mp4.html
Here is a video of the truck running cold when it was ~20F outside: http://s486.beta.photobucket.com/use..._1637.mp4.html