Originally Posted by mrsaimeeluck
i hope i can fix it cos i love racing the boys racers and making them eat my dust ;-)
I see you look after your cars then...
To get an accurate economy reading reset your trip counter to 0 when you've filled your tank, then when you've used at least 3/4 of the tank fill up again and you will be able to divide the miles travelled by the fuel you've used.
I don't know anything about 306s, but sounds like your oil is going somewhere it shouldn't/something else is mixing with the oil and then it's going somewhere it shouldn't.