According to the Lexus tuning house that specialises in the IS-F (RR Racing in USA), these cars once tuned respond quite well to an E85 blend of around 25-30%. Much more than 30% and they start leaning out too much and the benefits drop off.
So for the past month or two i have been experimenting with 10L-15L of Caltex Biofuel (rated between 75 to 85% Ethanol) mixed in with regular BP Ultimate fuel. There are no United service stations who sell E85 even remotely close to me, so the Caltex is what i have been using.
With the E85 blend, the car feels more responsive and more lively under acceleration so it seems to do the trick. Only downside is the already woeful fuel consumption is even worse with the E85 in the tank (normally 16-18L per 100km around town, with the E85 blend its over 20L per 100km). The poor fuel consumption is exaggerated because this car only has a teeny weeny 65L fuel tank, so the gauge goes down quite quickly.
I may decide to re-dyno the car with the E85 blend to see what the difference is.
So for the past month or two i have been experimenting with 10L-15L of Caltex Biofuel (rated between 75 to 85% Ethanol) mixed in with regular BP Ultimate fuel. There are no United service stations who sell E85 even remotely close to me, so the Caltex is what i have been using.
With the E85 blend, the car feels more responsive and more lively under acceleration so it seems to do the trick. Only downside is the already woeful fuel consumption is even worse with the E85 in the tank (normally 16-18L per 100km around town, with the E85 blend its over 20L per 100km). The poor fuel consumption is exaggerated because this car only has a teeny weeny 65L fuel tank, so the gauge goes down quite quickly.
I may decide to re-dyno the car with the E85 blend to see what the difference is.
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