Originally Posted By: eljefino
I do, but only in summer, and only because I always seem to have some cheap HDEO that I got on clearance. Figure the HDEO will clean something out and do some good.
I am using it because of eljefino...Would he steer me in the wrong direction?
Plus, using a quart per 500 to 600 miles in my 99SL2. I also put in a bottle of White Shepherd this oil change. Stopped all the valve guide smoke at idle. Years ago I saw UOA's here using heavier weight oils in GM engines and the numbers were good. Most of the oil I have was cheap (thanks to tips at this forum). My car seems to by happy with the Rotella.