u/Kornowski

Been servicing the F31 every 6 months now due to it being high mileage (163,000), and this time noticed a massive discrepancy between the iDrive oil 'measure' and the dipstick. I removed the old oil via an extractor down the dipstick tube at the rear of the engine, and removed roughly 6.5 litres. Though it's hard to tell exactly as the extractor is filthy 🙄

I've put back in around 6 litres. I ran the car up to temp, and measured it via iDrive and it's showing roughly 1/3rd of the way. I then turned it off and let it sit for 5 mins and measured the dipstick, which is showing just under max.

I know the physical dipstick is more than likely much more reliable, but it seems like a massive difference? Shall I leave it as is?