When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
20w-50 is great in the summer, but in the winter I would use at least a 10w-40 the hevier weight oil will help to cut down on blow-by and oil consumption. Do you have the friction modifier for the rear end.
No it wont have the modifier in it, the best stuff is made by ford, go back to the speedshop or to ford, both will have it, it is better than any aftermarket modifier...