Their employees are still friendly and courteous, but the last time I went to Grease Monkey for an oil change & lube I was very disappointed to discover that they do not use Castrol anymore, and instead have substituted Kendall brand, which is a lower-priced, inferior grade compare to Castrol. But did Grease Monkey bring their prices down? No. They raised them.
One of the reasons I started going to Grease Monkey several years ago was because they were the only "10-minute" oil change shop in the area that used Castrol brand oil (which is a must for high-revving import car engines). I will now take my business elsewhere