Hi everyone, For clarity's sake, I work for an advertising agency and we are currently doing some research about motor oil for a client within professional / trade communications. We are looking for any thoughts from professionals or amateur drivers/mechanics about any factors that help you decide which motor oil to buy; or anything about the way that oil companies communicate with professional customers (Good and bad experiences). If you have a few minutes, we would be really grateful for any thoughts you might have. Specifically, this is for Shell Helix (and other lubricants) - and interestingly I didn't come across much talk about it in various sites, so I thought I would find out what you think about their oils as well..? Many thanks!