I try and keep a close eye on my oil level, checking it often. All of my oil changes I haven't seen any drop really in oil level. However this time I am 4,000 some miles in and I am about half way on the safe zone on the dipstick. I did pull heavy a few times and I was on some steep land. I am planning on doing the vent tube mod that moparman came up with as I have the oil build up on the front of my motor. I Dont have any drips, no more than a slight haze for blow by and the truck runs great. Truck has 202,000 miles. Is this normal oil consumption? Will the vent mod help? 

Edited November 29, 20186 yr by Unreal Summit

First I would fix all the external leaking. Even if it just the vent tube. Power wash the engine clean so you can be sure. 

19 minutes ago, Unreal Summit said:

I have the oil build up on the front of my motor.

 

The amount lost could just a fluke. Check again on the next oil change.

That's kinda my thoughts as well. I should be seeing something else if I had something going on. I am hoping to do your vent mod this weekend since it will be above freezing and clean it all off at the same time. If I do lose the same amount next oil change should I be concerned? Or is it OK for it use this much oil? 

Maybe check your turbo and see if you got any oil there

Good idea! 

The 97 has a few external leaks and will usually need about a quart every 4,000 miles to stay on the full mark.

 

As for the 01 it has never required top off in between it's once a year 12,000 to 15,000 mile oil change interval.