My van has been using some oil in the past, I was planning a trip recently and a friend reccomended Lucas oil treatment, but I did not get it before I left on the trip. It was a 1200 mile round trip and towing an enclosed trailer. The first half (600 miles) I used 6 quarts of oil. Before the return trip I put in 2 quarts of Lucas, and the van only used 1.5 quarts of oil on the return trip, with a heaver load and about the same hills and mountains. This was my first use of Lucas products, but will not be my last. All my vehicles will have Lucas products of some kind in them. And will be recommending Lucas to everyone I know.