A couple of years ago I changed the oil in my 1500 to a 20w/50 Honda brand with moly. The bile is a 1990 model & has over 200,000 miles on it so I figured the thicker oil might help boost the pressure. Instead after about 15 miles I started getting a grinding noise, like it was slipping between 2 gears & not making full mesh with either. It comes & goes & the oil is the only thing that has been changed, so I am thinking of trying to go back to a 5 or 10w/30. My question is, has anyone else experienced anything like this? Maybe it is co-incidental, & that the oil is NOT the problem? Just looking for places to start. I had to park the bilke 2 years ago & she has been in the garage since, but I am feeling the need for some early spring therapy....maybe a ride on the dragon will settle my nerves a little!!!!