Hi Mark,
I suspect the problem is your oil temp sensor being on a AV input is not actually assigned to the "oil temp" parameter but rather a "GP Temp" parameter that is not sent in the standard generic dash stream. Attached below is a configurable version of the generic dash stream where I have replaced "oil temp" with AN 8 - Oil temp.
MarkHellier.lcs
For any others that want it I will also attach an un-modified configurable generic dash stream.
Configurable Generic Stream.lcs