Automobiles & Vehicles Deals recommendations and related topics
API CG-4 :
Official service category as of category Jan. 1, 1996, denotes engine oils suitable for 1994 low-emission, four-stroke diesel engines. API CG-4 engine oils afford improved deposit and wear control protection for these engines.Air Injection:
One method of reducing harmful exhaust emissions by injecting air into each of the exhaust ports of an engine. The fresh air entering the hot exhaust manifold causes. any remaining fuel to be burned before it can exit the tailpipe.