Quote Originally Posted by Greg Roles View Post
Hmmmm that is a bit of a worry, oil always ends up black obviously but the coolant situation is a bit of a red flag....in your shoes with a new car I'd be straight back to the dealer and get it in writing that it is OK, which will force them to investigate it!
Thanks for the heads up. Wouldn't something like oil float in coolant? The bubble or shade I was talking about was initially sort of at the bottom and are large in size along the same level in the tank. there are a couple of them which are seenacross the inside of tank - I've taken photos when the car was cool last night and now it seems to have moved up a bit while the eng coolant level is same. Btw engine oil has always been the same colour every time I checked it - light watery brown colour. What happens when mineral oil is mixed with synthetic one?