Hey, drove up to Dublin and the oil level was reading 0.7L (has been for ages) and half way up the motorway it dropped to 0.1L. The electronic dipstick is notorious for doing this kind of shenanigans, even BMW says it really only detects changes in 0.5L increments when you top it up. Car is fine, I just need to top up.

Any suggestions where I might get 1L (or 4L) near Ranelagh. I think Murphy & Gunn parts dept are closed Saturday mornings. Any ideas that doesn't have me traipsing about the city?
Thanks