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Message: <blockquote data-quote="ARdoller" data-source="post: 590679" data-attributes="member: 8914">i dunno, ive read so many reviews that say RP is a waste of money to use on a car that didnt use it its entire life. granted both sides are "stories/articles", but i think until i find hard evidence, im gonna believe the multiple upon multiple articles ive read that say RP is worthless on cars that never ran it previously, over one parts store SALESMAN that claims he read that RP fluids can produce up to an 8hp gain.if nothing else, id just assume that the parts store employee is telling you this just to get you to shell out the extra money for RP, because its his job. although i never do it, because i see 99% of my customers almost on a daily basis (unlike an auto parts store where you get people every day that youve never seen before), salesman in a store like that are always trying to pitch to you why the more expensive product is better. its all part of sales. he probably makes commission on everything he sells, which in that case, it would make complete sense that he tries to convince complete strangers that RP is better.</blockquote>