- Joined
- Jun 21, 2009
- Messages
- 2,831
I would disagree and say they do work. But like anything there is good and bad make/brands. I use NF octane booster which was rated highly so much so that half a bottle is more potent than using a full bottle of other known good brands. I use a half bottle of NF with full tank of 95ron petrol in my impreza sti type r and when Andy Forrest mapped it he was able to advance the timing a good bit more from what he would have mapped 95ron petrol with no octane booster so for me it was well worth using it as those extra degree's gained me 50bhp. If we had 99ron available over here I wouldn't need to use but unfortuality we don't(
Perhaps when my brother tried the additive it didn't work out so well because he was already running on 99 Ron, it was the most expensive brand we could find though. Must be expensive for you though! Cost about £20 per jerrycan when we used it!