I am not an experienced owneer but use 87 octane in my 76 palmbeach
regularly and it runs fine with no pinging.
>To any of you knowledgeable 455 HP Motor owners:
>
>If according to the "OLDS" specs that this engine should use 91 Octane Gas,
>must we use only this gas? If we use the 87 Octane, should we change our
>ignition settings to accommodate this lower octane level? Or doesn't it make
>any difference?
>
>I have been using "87" since last December's "76 Eleganza purchase. Ave MPG
>is 8.9-mostly on short trips. Sure would appreciate the advice of you
>experienced
>owners.
>
>Don Martin
>
>
>
regularly and it runs fine with no pinging.
>To any of you knowledgeable 455 HP Motor owners:
>
>If according to the "OLDS" specs that this engine should use 91 Octane Gas,
>must we use only this gas? If we use the 87 Octane, should we change our
>ignition settings to accommodate this lower octane level? Or doesn't it make
>any difference?
>
>I have been using "87" since last December's "76 Eleganza purchase. Ave MPG
>is 8.9-mostly on short trips. Sure would appreciate the advice of you
>experienced
>owners.
>
>Don Martin
>
>
>
