Can only comment on my own experience but I've never seen that blue writing on mine. I'd contact who you bought it from.

As for power figures I'd be inclined to believe it. Mine once mapped with mods showed 272 bhp on badger5's rollers and on the way home when tested on the gauge showed either 270 or 271.
 
Not sure what you mean tbh, I think the liquidgauge measures through maf reading though.
 
Ah I see now thanks, no idea how mine is tbh and won't be in my car for a week at least now. Have you tried them both ways, I'd assume there shouldn't be any difference.

I bought mine from them as well and were very good with me when I lost my PIN number for the gauge.
 
Sorry to drag up an old thread but seemed to be the best place to put some pictures of my Liguidgauge which arrived last week and just got round to fitting!!













 
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