"New oak" is a winemaker's term for oak barrels that are in their first year of use. Since two-, three-, and four-year-old barrels impart decreasing levels of oak flavors and aromas to wine, most winemakers rotate their cooperage depending on each barrel'sage. Winemakers who wish to impart oak flavors to their wine (and many do not) will usually discard any barrels that have been used for more than four vintages, because the insides become encrusted with deposits that prevent interaction with the wine. See also barrel-aged and barrel-fermented.