go Johore and pump.
the price is at least half of that in S'pore.
a full tank in s'pore cost about S$12-13 (V Power) but in Johore is
about RM14-15 which is about S$7 (also V Power) can pump until
overflow also no heartache. with that amount of petrol, my SP can
travel a distance of 230km at least. sometimes can reach 240km
even.
rumour has it that M'sia petrol is dirty, but how dirty it can get
anyway? besides the whole of M'sia is using the same petrol and no
one is complaining. if you service ur bike regularly (once or twice
a year) u won't have any problems.
and besides, there's no 3/4 tank rule for bikes. i always enter
M'sia on my reserve tank. dry like mad then go in and pump like
mad.
I've been using V Power for the last 5 or 6 months already. it's
been in the M'sia market for quite some time when S'pore was still
on Shell XO. Well, at least it's better than most other petrol. i
thought XO was not bad but they decided to change it.
furthermore can buy cigarettes, for those who don't know, it's
S$2.50 for a soft pack.
hee 
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**I don't ride fast, I just fly low**