IW-RS4

but the manufacture date is 09/2007. What's the maximum amount of time to run with original oil?

greatwhiteshark

I think it should replaced at least once a year regardless of mileage. Great color btw.

STALKIN RS4

Yes, minimum once a year.

Reggie

My rule of thumb is six month on oil

daveak05

I do the same on synthetic, any of my cars. As long as the mileage doesn't get excessive in that time.

April

I certainly wouldn't be comfortable keeping it in there longer though.

daveak05

depending on mileage oil gets pretty dirty in 12-14 months, and acids in the used oil can be corrosive to internal engine parts.

UOA may have showed little or no degradation(debatable), but it doesn't mean the oil isn't dirty.