Recent content by ForestCat

"A higher oil pressure indicates that the pump is supplying more oil than the bearing leakage rate. A lower pressure is the converse." Pretty much sums it up. While Harleys do have "real" (as opposed to plain) bearings in most of the engine, and, accordingly, tend to have much lower oil...

"However, assuming we aren't on the bypass, 5w-20 or 5w-50, it doesn't matter, the engine sees the same volume of oil. The heavier oil will provide greater film thickness and not cool perhaps as well (run a few degrees hotter) and will, due to being thicker, generate more oil pressure...

P.S. That thread gets serious again after a page or two of joking around, & others weigh in w/ similar experiences.

Ammolab, Please see here: http://www.v-twinforum.com/forums/engine-oils-lubrication/150802-50-straight-weight-miracle.html Ghostflame, my manual DOES say to use 50 weight above 60 degrees. As to rattle/shake, I've had two other long-time HD owners say it sounds noisier than normal. The motor...

Hi, I seem to remember hearing as a kid that heavier oil somehow "increases clearances". Probably just a myth... In any case, I have a '97 Heritage Softail with 80ci Evo motor, 16k miles which seems to run well. However, once the engine/oil get good & hot, the mechanical (sewing machine) noise...