Apr 20, 2015 · Only the Amsoil made it into the GOOD WEAR PROTECTION category (75,000 to 90,000 psi). Edelbrock, Royal Purple and Crane Cams oils made it into the MODEST WEAR …

Feb 11, 2009 · C5 Tech - Amsoil ATF VS. Royal Purple Synchromax - As an avid hater of RP products I am hesitant to even try it. However, with most of the other RP haters saying their …

Jan 25, 2015 · C6 Tech/Performance - mobile 1 vs.amsoil vs royal purple - I have been using mobile 1 since new (26k mi). I have a friend who is a dealer for amsoil and can get me …

Aug 2, 2010 · C6 Tech/Performance - Mobil 1 vs. Royal Purple - A question for Z06 drivers - what oil do you use? The factory recommends Mobil 1 full synthetic, but I've heard many, many …

May 28, 2007 · C5 General - Royal Purple vs. Amsoil - Has anyone heard anything negative about amsoil or royal purple?

May 1, 2011 · C6 Corvette General Discussion - Amsoil -vs- Royal Purple Motor Oil - Anyone have experience with Royal Purple (RP) oil? I also post this in the Z06 area, but yesterday …

Mar 5, 2024 · C7 General Discussion - Royal Purple VS Mobil 1 - Hey Guys, I wanted some opinions. I typically use Mobil 1 5w30 for oil changes and I was wondering if Royal Purple is …

Feb 22, 2015 · C3 Tech/Performance - 1000 mi new engine Valvoline VR1 or Royal Purple HPS - The engine builder stated that conventional oil is better I just can't see how that would be the …

Sep 22, 2007 · C5 Tech - AMSOIL "White Paper" Gear Lube Study - GM, Royal Purple Redline, AMSOIL - For those interested in a comprehensive comparison of the major gear lubes on the …

Jul 10, 2004 · C3 Tech/Performance - Mobil 1 vs. Amsoil vs. Royal Purple.. - Does anyone have dyno results comparing those three oils? Specifically - I'm looking for HP/TQ numbers with …