Don't know if this has come up before. If you are interested in oil and your engine you might like to check out www.bobistheoilguy.com or alternatively bang in" the motor oil evaluator". It is a site like this but instead of discussing Land Rovers they discuss oil, different grades,makes etc. Seems to be U.S. based but interesting non the less. Free registration and a forum and an oil evaluator section. What more could you want for a first date? Worth a look.