Becareful when you're taking the reading from the dipstick. I overfilled mine (Not in the T but a previous car) after driving the car for a short period (round the block) then checking the dipstick, deciding it could do with topping up and then doing so. If you check it after any sort of drive it can appear alot lower than it actually is. In my 172 I checked it in the am and it was full, turned it over and drove and it was just below mininum. No oil had escaped just clinging onto metal I guess. I also told this to a trader and he said that was normal. Therefore, bare this in mind. Checking when not driven overnight and it was again back upto full again.