<VV> lead additive

[J R Read_HML]

It means that the lower HP motors GENERALLY don't need higher octane fuel. 
You do not get more mpg by using higher octane, so it is a waste of money to 
use it if you don't need it.  Octane ratings are a measure of anti knock 
(ping) protection.

Since it is rather difficult to hear the engine (for ping) in a Rampside, 
you just might want the "insurance policy" of higher octane.  You can likely 
get away with lower octane, so I would suggest testing 89 to start out. 
When you are in a tunnel or along side a bridge abutment, you should be able 
to hear ping under throttle if it is there.  Someone else also pointed out 
that if the engine diesels at shut down, that could also be a sign of need 
for higher octane - but it could just as easily be a sign of a carbon hot 
spot in a cylinder.

Later, JR

CCE CORVANANTICS CORSA member
'61 Rampside Standard 4/110
'65 Monza Convertible 4/140
'66 beater 500 Coupe "icemobile" 4/140 (50%)

----- Original Message ----- 
From: <steven at sashimi.org>

Does this mean that the 80 HP motor is indifferent to the octane content of
it's fuel (assuming 87 octane or better) or does this mean that the 80 HP
prefers the lower octane stuff?  And in either situation, why would that be?

- Steve Brown

'62 Rampside [currently (and unnecessarily?) tanked up on 93 octane]







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