2-3 mpg increase?

[Desert Goat Herder]

I think that I am chipped matters on the numbers too. I have like the only 530 auto chip mark produced and did notice the number change last year but attributed it to outside forces such as driving habits... went back to 93 octane. 89 octane did nothing but rattle til I rebooted the computer for the new fuel (1.5 miles later).

I've got a 95 530i. What is this reboot on the computer? Is it just disconecting the battery for some length of time. I'm new to Bimmers so I don't know all the in's and out's of the beasts. BTW, I use 87 octane all the time and get 22.5 to 23 mpg average.

[632 Regal]

reboot the computer could mean disconnecting the battery for a while or disconnecting the wire harness from the ECU for a couple minutes. faster and you don't need to enter code into the radio.

I've got a 95 530i. What is this reboot on the computer? Is it just disconecting the battery for some length of time. I'm new to Bimmers so I don't know all the in's and out's of the beasts. BTW, I use 87 octane all the time and get 22.5 to 23 mpg average.