quote:
Originally posted by goodvibes:
Salsahh, we're not the only ones who are neg. about most adds. This is from the SFR site. "Once again, be very careful in selecting a lubrication additive. Most reduce friction, but they have potential negative effects. Most friction reduction products contain solids, resins, high sulfur content, heavy metals, etc. and are not completely compatible with today's engine oils. This is a reason the manufacturers ask you not to use additives. Most of these additive companies make false or totally outrageous claims, and it is very expensive to disprove the claims made."