Re: IML: Unleaded or Leaded gas

[Dave Salyer <salyer@xxxxxxxxxxxxx>]

My 71 Imperial made it 294K miles without a valve job and was still running
smooth but weak when my son rebuilt the engine. Once 87 octane unleaded came
out I used it exclusively. Has some pinging but not excessive.
Dave
----- Original Message ----- 
From: "DR CHALLENGER" <drchallenger@xxxxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Friday, March 10, 2006 12:33 PM
Subject: RE: IML: Unleaded or Leaded gas


> first year for cats was 1975.
>
>
> >From: "Rob McCall" <Rob_Mopar@xxxxxxxxxxx>
> >>
> > >From what I've read, the unleaded heads were being phased in for the
'72
> >model year, along with the lower compression ratios.  By '73 everything
> >should have been unleaded.  I believe cat converters were phased in
during
> >'74, and unleaded was mandatory for the cats to live.
> >
> >
>
>
>
>
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