My two pennies.
1. Self inflicted wound by a sales rep at a company years ago, sorry if it is a repeat I have mentioned before.
Late 1980's and many cars still have carb's. One rep does a high mileage into/home from the office. We got offered some "magic" things to try and improve his economy. One was a magnet that wraps around the petrol pipe and claims to align the petrol and smooth the flow blah blah blah. Any way he fitted it and ran it for a couple of weeks. Always coming into the office and saying how much better it was blah blah blah. One day his car was in for a service and he borrowed mine. We got a call from the dealer asking if he wanted the magnet thing to be detached from the brake servo hose and fitted to the petrol line where it should be!
Just priceless
