View Single Post
Old 11-09-2009, 09:09 PM   #10 (permalink)
RobertSmalls
Left Lane Ecodriver
 
RobertSmalls's Avatar
 
Join Date: Aug 2008
Location: Buffalo, NY, USA
Posts: 2,257

Prius C - '12 Toyota Prius C
Thanks: 79
Thanked 287 Times in 200 Posts
Quote:
Originally Posted by Frank Lee View Post
The problem with old oil isn't just contaminants floating in it; various chemical additives get depleted over time. So a thorough cleaning process by itself is not enough for returing used oil to service.
Does this mean bypass oil filtration won't allow extend oil change intervals?
  Reply With Quote