Sorry not directly M3W related but many years ago while driving my +8 circa half way through France on our way to Italy I had used up the litre of oil I carried just in case...Unable to find any oil to my liking in the m/way services, I spotted a can of STP oil additive.. So just added that to bring my oil level up to the mark on the dipstick.... Never needed to add another drop of oil on the circa 2.5k miles left on that trip... Go figure..?
