Originally Posted By: ems1
Bought 5 qt. Pennzoil Platinum 5w30 jug at Walmart last week. There was only one GF-5 on the shelf. There was about 20 old GF-4 labeled jugs on the shelves. Probably no different than the old bottles labeled GF-4 but it made me feel better.
Was there any visual difference other than looking at the back of the bottle?