Posted by Tim '80 633 on August 02, 2001 at 16:00:45:
In Reply to: Anyone use Royal Purple Engine Oil? posted by Dean on August 01, 2001 at 18:20:42:
Dean, I teach a class here in Houston where the students perform street-legal mods on late-model 5.0 mustangs and GM F-bodies. I dyno these things all day as they do their baseruns and their runs with modifications. I was very skeptical at first, but most cars here pick up 5HP when we drain and refill with Royal Purple. I think the engines actually sound smoother at high rpms with this stuff. Strange, but true. I may splurge and treat my "six" to some soon. Tim - no affil w/RP