28-03-2022, 01:59 PM
If I was doing a lengthy run I would take a couple of 1 litre plastic bottles of oil, easy to stash away in the rear footwell. As far as mixing oils go, obviously mineral and vegetable based oils are a no no, but I have never worried too much about mixing mineral oils of similar grade. It is better to have a decent amount of oil in the engine, of whatever grade or type, than to have none! I found that the oil consumption on my saloon reduced considerably once I realised that I had the wrong dipstick and had been habitually over filling it.