View Single Post
      12-17-2013, 08:36 AM   #22
Pierre Louis
First Lieutenant
3

 
Drives: 2011 335d Sport Package
Join Date: Apr 2012
Location: Savannah


Posts: 301
iTrader: (0)

Reputable companies test for immediate effects on ASTM parameters of their additives. I know of one that does: PS. Most people on enthusiast message boards, however, use additive to improve performance, longevity and reliability, which are much less clear compared to the sales pitches. There are some small studies on dynos by companies selling additive comparing power with and without it but not for long term effects.