- Decrease trim provides a 7mm screw and T20 screw. Get rid of and pull down difficult. Not needed to clear away reduce trim for 2018's. one. New cluster software package seems to have removed the oil temperature gauge. Almost certainly new cluster orders is not going to have it. https://one-up-mushroom-bars01210.ssnblog.com/31200261/2015-mustang-gt-digital-dash-secrets