According to tests by the Environmental Protection Agency (EPA) and on the European combined cycle, fuel economy is slightly higher overall than the lower-powered non-hybrid LS;[REF][REF] the LS 600h L also receives a U.S. Super Ultra Low Emission Vehicle (SULEV) rating [REF].
Standard equipment on the LS hybrids includes all-wheel drive, a Torsen limited-slip differential, and an Adaptive Variable Air Suspension,[REF] plus an optional Active Stabilizer Suspension System (an upgrade to the standard multi-link front suspension expressly developed for the LS hybrids).