Posted by Fats on October 10, 1999 at 23:12:28:
In Reply to: Oil Change and oil questions posted by Edwin Jackson on October 10, 1999 at 04:36:01:
You need that "O" ring for the seal it creates to insure that your oil is pumped through the filter and doesn't just squirt around the sides of the filter.
As to the old "O" ring - try looking on the inside end of the old filter - likely it was stuck down and it may not have been immediately apparant where it was when you went looking for it.
Hope this helps - I use 10-30 Motorcycle oil exclussively regardless of temperature - I buy my castrol at Walmart - cheapest source I have found.
Keep the rubber side down
Fats