Each and every product of Hi-Gear is engineered to meet or surpass the strictest of industry standard specifications. Hi-Gear maintains its own research and development facility and formulations are constantly under review to ensure the latest technologies are implemented. Hi-Gear's premium line of motor oils meets API SAE(SM) specifications and is formulated to offer superior lubrication as well as fuel and emission reduction. Hi-Gear Motor Flush removes varnish, sludge and deposits which cause valve lifters to stick and reduce oil circulation and cooling. Hi-Gear Motor Flush is safe for rubber seals, gaskets and valve seals. It restores proper lubrication to the metal surfaces. Hi-Gear Motor Flush is compatible with all types of oil and engines including turbocharged engines. This product is recommended for engines with more than 6 cylinders and oil capacity up to 10 quarts.