losing motor oil!!!

I have the same problem,after a oilchange everthing is ok the first 5k,after the engine need 2-3 gallons of oil ,no oilleaks nothing,somebody tell my when I do my next Oilchange is better put 1 gallon of Lucas inside after everything is better, for the Engine .My question is ,is this true or no when I do the oilchange whit Lucas my Engine use less Oil

 

I Waiting for the Answer for my Question

 

for a motor that is using oil lucas is just a band aid. just makes the oil thicker and my mask some problem for a little while but the cause is still there.

 

I No the problem is here and in the future I have to rebuild the engine ,only I think when I do lucas inside the Oilchange I have little more time,in 6 Months is everything different for me,now is not the time to rebuild for me.(maybe rebuild or buy a other Truck)I have a question more,when the oil Is thicker my oilpressure=PSI go little up or not.Thanks for Helping

 

I have never recomended Lucas, the engine is OIL cooled, and made to run 15/40 or thiner oil, if you thicken the oil you will change the spray caracteristics of the oil and may do a lot more damage.
We did not have anybody using Lucas in the truck engines we worked on we did have a guy add it to an 18 speed Eaton about 10 years ago it failed and when the top was removed the gear guy called eaton and they sent a representative, he just looked in and rejected the warrenty coverage. The Lucas changed the oil flow threw the transmision and it overheated. That truck ran the Cokahalla, heavey loads and steep hills.
On you oil usage if after an oil change it does not use oil for 5,000 miles then you should be changing the oil at 10,000 miles or earlyer. You might want to try shell oil it seems to lengthen the time before oil usage starts.
Just a thought! No spell check

 

Cant fill our 2005 12.7 above the add mark or it blows it out the tube. Before and after the over haul.
If it's not going out side on the ground you probably have a liner are two scored.

 

Does the oil have a burn smell to it? That is a good way to tell if you have a badly gaulded liner

 

Same problem here driver I burn about 8 gallons of oil in 3,000 miles and I sick of it don't know what to do. Truck has 983,000 miles Detroit 14L