Before you do the deed, have Blackstone Labs send you an oil sampling kit. Send in a small vial of your oil and for $25 or so they analyze it and tell you how your engine is aging/wearing. If you care enough to change it yourself, you may as well know as much as you can about your engine.
Before you do the deed, have Blackstone Labs send you an oil sampling kit. Send in a small vial of your oil and for $…