Isn't there a knock sensor on the engine that will detect
detonation/preignition and will retard the timing to compensate?
If so, by using lower octane, you may not hear a ping, but your performance
will drop off slightly as the computer pulls back the advance.
I am definitely in agreement that if you are hearing pinging, to either
change to a better fuel or back of the timing advance slightly.
*******************
-----Original Message-----
From: Rader <rlr@bbt.com>
To: dakota-truck@buffnet.net <dakota-truck@buffnet.net>
Date: Wednesday, April 15, 1998 10:26 AM
Subject: Re: DML: supreme or regular
>Oh no, another octane thread...
>
> This question is actually very simple: use the _minimum_ sufficient
octane
>level to avoid preignition (heard as pinging). To do otherwise will either
>damage your engine (if you allow it to ping), or waste money (if you run
>a higher octane than you need). Unfortunately, octane ratings are a little
>like religions, and for that I blame the oil companies and their misleading
>advertising campaigns.
>
> We can also discuss different additive packages and cleaners in different
>octane grades if you like, but that is more a function of good-quality vs.
>poor-quality brands rather than octane rating.
>
>> Always 93. A must if you have the SBEC installed.
>
> Good point. There are certain engine modifications which will require
you
>to run higher octane to avoid pinging.
>
> Ron
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