My 2001 Crown Vic patrol car just turned over 200000 miles on a steady diet of 3000 to 3500 mile OCI on Motorcraft 5w20 and Wix filters. The engine still runs strong and it is operated in much more severe conditions than 95% of most vehicles on the road. If you are still on the fence about using 5w20 in a vehicle calling for it, dont worry the body will fall apart before the engine.
