ATI Break-In Oil

Used by Joe Gibbs Racing to break-in and dyno all their engines, this petroleum oil provides optimum levels of zinc and phosphorus in SAE 5W-30 & 15W-50 viscosities for tight clearance and/or low temperature break-in. Good for restrictor plate engines, drag race engines, and OEM rebuilds. Provides excellent ring sealing. Does not require additional additives. Good for full power pulls on the dyno, one night of racing or up to 400 miles on the street.