SkinnyJoint said:
what 87 is not all u need... its not about power or nething a premium gas is going to burn better period which will increase life in certain parts as well as keep cleaner
Not quite sure I understood what you just said... but here's a quick brief on how
the whole octaine thing works.
Octaine is a combustion retardant. Higher octaine fuels do not ignite as quickly,
which is good for high compression, and forced induction engines, but bad for us.
Higher octaine in no way implies "cleaner" gas, octaine is an additive, and has absolutely
no affect on how 'clean' the fuel burns.
The long and short of it is this... if you are putting anything above 87 octaine
in a stock P5 or MP3 you are running the risk of having to replace your cat.
Higher octaine fuels may not fully burn in cars that were not designed to run
them. This can cause the unburnt fuel to collect in your catalitic converter,
and eventually, it can cause it to fail.
If you are putting 89, 91, 93 etc octaine fuel in your P5 and you haven't upgraded
to high compression pistons or a turbocharger, you may as well be pissing money
down a well.