i'm using tufoil on my b16a...no problem so far...it makes ur engine rev more smooth...FC not much different...use it when u change ur oil...i'm using 3.7-4 liter of castrol magnatec with 1/2 bottle of tufoil...
I plan to buy a silvia spec R. Does anybody know how to recognize this model? Are there signs that easily identified either in the cabin or in the engine bay?