My VIN 06960 original sender turns on the light at almost exactly 2 gallons left. After having a this same discussion on the DML ealier this year, I belive many of us came to the conclusion that the OEM senders turned on the lights at completely random times, if at all. It could be a bad adjustment in the sender (I think John Hervey said he could adjust the timing on it) or it could also be corroded contacts in the sender. While I do not have a TankZilla, while at the tech session in Cleveland last year I heard Rob Grady and Bob Zilla say, and I quote, "When TankZilla turns on your low fuel light, you need gas NOW!". I believe the intention behind this is when the OEM sender is 'supposed' to turn on the light, it seemed a bit early and rather unessesary. So TankZilla was programed to turn it on only once it was absolutely necessary. Hope this answers your question. Jim Reeve MNDMC - Minnesota DeLorean Club DMC-6960 <- Now under a garage under 15 inches of heavy wet snow. [duplicate quote snipped by moderator]