autoserv.co.nz Service Program Experts With extended service intervals you are seeing vehicles less often and this results is more prominent engine sludge, reduced fuel economy and engine wear plus reduced retail labor recovery. Wynn’s Cleans and Protects the vehicles Fuel and Oil systems, which will result in Increase engine efficiency and performance reducing exhaust emissions. Wynn’s Service Programs provide Better Fuel Economy & Less Wear and better workshop profit.