I was hoping to drive my P85D approx 385km from Adelaide to Penola next Saturday but I see the forecast is 42 degrees. I would be driving in the heat of the day with no passengers. The road is mostly flat after the Adelaide Hills. Will I make it without a top up charge if I cruise at 100km/h? Would it help if I slowed down? The following morning I planned to drive a similar distance to Bacchus Marsh before a quick top up at the home of a friendly owner before aiming for Melbourne. I'd be doing that trip in the morning. Should I rethink the trip? I have ICE alternatives.