Several improvements have recently been made in Model A engines which tends to still further lessen oil consumption. A shield is now provided which fits around the oil pump and insures a more uniform distribution of oil to all cylinders. The oil pan tray has also been lowered 1⁄8”· This has been accomplished by correspondingly raising the height of the bead in the oil pan tray. (See Fig. 1204.) The piston ring pressure has been reduced to approximately 5 pounds. In addition the width of the slot in the oil control rings has been changed from .040″ to .072″. Sometime ago the size of the oil passage holes in the pistons were changed from .100 to .125. This was covered in the May, 1931, Service Bulletin. When installing these improved parts in old cars or trucks, they should all be installed at the same time. Under no circumstances install an oil shield without installing the new oil pan or vice versa.