Just hit 500 hours on a rebuild without a single oil change and it's still running clean

I know everyone says to change oil every 250 hours, but I wanted to test a new synthetic blend on a 6.7 Powerstroke I rebuilt last fall. I've been pulling oil samples every 50 hours and sending them to a lab in Tulsa. The last report came back with TBN and viscosity still well within spec, and no abnormal wear metals. It's made me question if we're just wasting good oil and money by sticking to the old schedule so strictly. Has anyone else run a long-term test like this and seen similar results?

3 comments

3 Comments

charlieh7418d ago

Honestly, who cares if you change it at 500 or 250?

fionat5518d ago

It's not that big of a deal.

abby_fisher18d ago

Guess you just proved oil companies love selling fear. Lab tests don't lie, but my wallet feels attacked. Keep going and see if it makes it to 750.