Thank you, Alan. I'm flattered. Will, the elephant (I believe) represents what I know as The Elephant Oil Company but may be the Indian Oil Company. It is common for automotive manufacturers to endorse a brand of lubrication for their products and that is what I think the elephant is all about. No one has ever confirmed this with me but I think this is some history of the company represented in your parts book and on the oil cap. I believe the "Safari Commemorative" / Ebay jargon is crap and the oil cap is the IOC logo. Assam Oil Company Ltd. (AOC) was one of the earliest enterprises in the world engaged in exploration and production of oil. Oil was discovered in Digboi in northeastern part of Assam in 1889 by Assam Railway & Trading Company (Originally formed with the object of drilling for oil, later on Assam Oil Company was created to carry out exploration work in Assam and adjoining areas), which established the predecessor company to AOC that was later acquired by Burmah Oil Company Ltd.(BOC), founded 1896, which played a major role in the oil industry in South Asia for about a century through its subsidiaries and in discovery of oil in the middle east though its significant interest in British Petroleum, and also discovered Yenangyaung Oil Field in 1897 and, in 1901, discovered Chauk (Singu) Oil Field, both in Myanmar. Assam Oil Company was taken over by the BOC in 1910, and between 1910 and 1930, the BOC carried out extensive exploration work in Assam and adjoining areas. In 1937, BOC, Royal Dutch/Shell, and Anglo Iranian Oil Co applied for exploration licensee in India and started geophysical survey. Due to World War II, all activities were suspended. Assam Oil is now a division of Indian Oil. It seems so matter of course to recognize the whole family of Z cars and the first thread makes no distinction which is why I made my initial comments, moonpup. There is no question we are talking about a slang and I believe everyone understands that because we understand the "whole family" concept. Your comments made me wonder. I plan to visit a RHD Fairlady this weekend and will take this conversation in mind for a further look at the Japanese Z.