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I've got record on mine. Also a Peak button, the forward and back arrow for setting peak and a reset button. I think there is more buttons on the II unit.
I think thats right. The II has over a minute, whereas the original only has 30 seconds. Only other thing I could find out, is that the II makes the gauges warning audible throught the unit.
Thanks. Hol, I'm pretty sure it was you that came up in a search regarding Defi oil pressure senders. If you have any input to this thread, it would be most helpful: Defi Oil Pressure sensor