If you using 30w in your zuk you are going to ruin your lifters. 30w is for diesels. It is made thick, that is why you aren't smoking, it is too thick to get through the rings. I ran it in a 4 banger when I was in H.S. because we had it laying around, we bought it in 50 gallon drums for our equipment on the farm. The stuff practically ruined my engine. The only other time I know of people using it in gas engines is for rebuilding purposes.
<font color=green>88.5 Samurai "DONT LAF",6" of SPOA lift,4.16 TC,32's,DSL's</font color=green>