Good call. yeah the Oil light comes on at about 1/2 tank or a little less on most 2t scoots, plenty of reserve. I think the designers figure people don't act on a bright red light right away (true in my experience). One thing to look out for that I just remembered, look out for cracks around the oil sending unit. There was one bike I worked on that I even tried a new sending unit and it still leaked then I ended up taking the bottle out and looking super close and there was a small hairline crack that would leak 2t when the reservoir was full. If you decide to get a new unit, I can help you get the right part. PM me if you'd like a quote. Also about the duct tape, I tried all of that and the only permanent solution was a new sending unit, I think one of those "stop plugs" would work though I never tried that.