Originally Posted by Baddog
The RP did cure a halt in the engine. Not sure what it was but around 4k RPM's it felt like the engine fell flat on its face. I put in RP and it even feels smoother in the low end and doesn't fall flat on its face anymore.
I will give AMSoil a try next time. I haven't read many problems with RP and it really has helped my engine out. So I will stand by it for that fact.
how often do you change with RP?