So I got rid of the Merc and got myself an old VVTI Celica. Other than the power steering not working - something that doesn't bother me - there is a leak somewhere. I've put 4.5 litres in and after about 500 miles it's all gone! Can't see any visible leaks in the engine that would should that much loss. I've had a look around and seen Wynns Engine seal stuff. I know some people frown upon it but do you think it's worth a blast? Can't get any worse than it is. I need to change the head gasket at some point in the future but for less than a tenner it's gotta be worth a go until I can put the time aside to do the big job