mustafgander you know you enjoyed it, all that lovely black oil ,the thrill of the slipstream in the hair [if you had any after removing broken plugs ]ajusting the vacum pump ,retrieving the engine bearer bolts and anything else you dropped from the mess in the drip tray , come on the jet boys had no fun at all. The odd pint of oil top up the to the max not 50 to 100 gallons [if the engine didn't use much oil there was something wrong ]also the up side was petrol was in the low thousands of gallons on the big birds and 100s on the Dak instead of the hours spent refuelling 747s one could take War and Peace to read whilst refuelling those . I know it's rose tinted glasses time but it could be fun ,we were younger then.