Re: Y'all Come back now ya hear? (delete this)

["Ewan Hopkins" <ewanhopkins@hotmail.com>]

>does) is actually a HUGE waste of money. See they add this additive into to
>NOT burn the fuel. So in another words they add something so the fuel just
>most of the time goes out the tailpipe in condensation for. Anyone

A bit of a sweeping generalisation... it's all a question of tradeoffs.
Low octane = faster burn = greater risk of knock/burnt valves/etc.
Every engine is different and they behave differently according to ambient 
conditions. So you go for the safe option which suits most people most of 
the time, i.e. tending towards the higher end octane.   This is especially 
true for older cars which have relatively unsophisticated fuel/ignition 
management.  The other side of the coin is that the slower the burn, the 
greater the likelihood of unburnt/ partially burnt fuel going out the 
exhaust. So you trade-off between safety (higher octane) and efficiency 
(lower octane) and this trade-off will suit some cars better than others.

Ewan Hopkins...

'85 Storm 2.0
'86 GT 1.8

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