;D fantastic, you have a personal mechanic that knows all about it! You are lucky, hope the mechanic is a good one too. Yea the fuel thing is crucial. It is not said bit the fuel actually is full of minute dirt that accumulates at the bottom so if you pump that into your motor... Adios amigos lol... It is also good habit to empty the fuel tank every year to get rid of all that dirt... You don't want it piling up like laundry ;).. In fact ask your mechanic if he did a fuel tank drainage recently. Happy driving!! ;))