[Brock]

there is more to good synthetic oil than HP gains.....you want heat shear resistance, viscosity breakdown resistance, cleaning properties, and scar wear tests typically done with 4 ball test. If you only go for extra HP gains then you may be opening your engine up to long term effects that may affect reliability.

Me personally....think all synthetics are going to give you the same HP gains given similar weights and ratings on oil tested for full synthetics. The other numbers that tell how well it is protecting your engine is more important...and you want a good all around synthetic not one that is very high in one area and then subpar in the others. Just my 2 cents...

if you are happy with it...then keep on...but better oils out there than RP in my opinion.