Personally, I would just change the oil, drive it 20 miles, and change the oil again to get out any of the remaining mess. If sludge was really your problem there are products you can buy and use to remove sludge form your engine.
Wildwood, Florida. Wildwood is a city in Sumter County, Florida, United States. The population was 3,924 at the 2000 census. According to the U.S. Census Bureau's 2004 estimates, the city had a population of 3,598. Contents.
Lake Reedy 27.5 +/- Acres in Frostproof, Florida. The Lake Reedy property is mostly wooded with many trails throughout. It has a heavy-duty graveled driveway with gate access and adjoins a very large nature conservation area. Nearby Arbuckle Lake is known for its fantastic largemouth bass fishing, as well as wildlife viewing.