[T3] type3-vwtype3.org Digest, Vol 87, Issue 11

[Jim Adney]

On 11 Dec 2017 at 19:21, Keith Park wrote:

> Depends on how your engine is set up, CR etc.
> 72's in the US had dished pistons and stepped heads, it will
> run on 87, the 73's had flat tops and needed 89 in the hotter weather.
> if it doesnt knock and ping on a certain grade, there's no reason
> not to use it.

I'm pretty sure that '72s and '73s both have the dished pistons. They 
both had the reduced 7.3:1 compression ratio.

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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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