Hmm.. Yea, i could do that alternator cut-off thing. I'm not sure, but my old crash-damaged Honda might have a deep-cycle battery[EDIT: It does'nt], atleast it looked like when i yesterday removed it(for helping battery for my VW starting problems)
As soon as i get my Golf repaired, i think i'll do these:
-Replace bulps with LEDs as much as i can/is worth
-alternator switch
-automatic EOC
I've been thinking that with my new P&G drivestyle plus EOC and those other things, i can get efficiency to maybe 4-5l/100km. And i would be happy if it gets even to 5