fuel cost vs fuel economyFebruary 13 2012 at 11:19 AM
|Dan Jones (Login 74Pantera)|
from IP address 22.214.171.124
Response to You have some good points....
> a daily driver is something that I would not want to have to run 93 octane
> in all the time. With 87 octane being almost $3.50 a gallon around here, I
> would not want to pay for the good stuff for a daily driver.
I find this to be a fallacy. If you run an engine optimized for 93 octane,
the fuel economy increase will just about offset the difference in the cost
of premium fuel. Plus a higher compression ratio will allow you to run a bit
more cam overlap without losing lower RPM performance (static compression
ratio offset the loss due to overlap). Of course, you can't have it both ways
(too much overlap will kill your fuel economy).