I've just started using Pre-MIX in my 13B-MSP. Smoother feel almost immediate after the 1st fill-up. I'm putting in bout 200ml (believe it's a US quart) for every 50 litre tank.
Like lennon said RM 60 for a 1 litre bottle to last 5 fill-ups.
HKS SLD TYPE II
Used
RM550
Suitable for Altezza Automatic Transmission
Go beyond 180kmph
Reason to sell: Changing To Manual
email me: nikosan[at]doridoriautoparts.com