I have an 04 2500 burban with an 8.1 I have 120900miles and I put about 1200 miles a month Im not sure how many hrs but alot of idle rush hr traffic. I burn about 1qt of motor oil every month and a half, Well last month I checked my oil and as usuall I was low, I jus happen to be changing out my diff fluids so I added a quart to my motor. Man it sure did quiet my engine and the pressure is still the same actually seems to have
more power( maybe jus my imagination) I checked my oil yesterday about a month later and my oil level is almost the same. In the long run what harm can I do by adding 1qt of gear oil with every oil change?

 

do not put gear oil in your oil ... if you need thicker oil just use thicker oil . if i was to add a thickiner add lucas oil stabilzer what oil do you put in there now ?

 

Ive tried lucas. Ive even used it 100% but the gear oil seems to wrk better with just 1qt. What will happen if I keep using it?