Morning @kezo As it’s now the morning and I’ve had some sleep, I’ve attempted to work out the approximate mpg equivalent of my trip yesterday.
The total journey was 82 miles. Assume 42 miles on electric (38 from the initial full charge plus 2 x 2 miles generated in HEV mode on the return) and the remaining 40 miles on petrol.
The car states an average of 65 mpg for the journey, but bases that on the petrol used divided by the full 82 miles. That means the car consumed 1.26 gallons. However, that 1.26 gallons was actually used over just 40 miles, so the actual mpg when driven in petrol mode alone was 40 divided by 1.26 which equals 31.74 mpg. In isolation that sounds dreadful. However, the electric mileage helps balance that.
The 42 miles on electric cost me £2.60. 1.26 gallons at £6.32 a gallon (current price here) = £7.58 petrol cost. Added to the electric, the total journey cost me £10.18. Had that £10.18 been spent on petrol alone, that would have paid for 1.61 gallons. Therefore the ‘true mpg equivalent’ for the journey yesterday would be 82 miles divided by 1.61 gallons which equals 50.93 mpg, which is pretty much what I would have got from the BMW on that journey.
Broadly, what this is telling me is that round trip journeys of less than 40 miles in the Tucson will cost considerably less than they would have done in the BMW. Round trips of up to say 70 miles will still cost less than the BMW. 70-100 mile round trips will probably cost roughly the same as the BMW, whereas round trips of over 100 miles, with just one full charge to commence with, will cost more in the Tucson than the BMW. Thankfully these longer journeys are now infrequent. Your long journey the other day worked out at an mpg equivalent of 56 mpg but you had (almost) two charges whereas if I was doing that journey I’d only have one charge so would have got a lower mpg equivalent.
However, the above doesn’t take account of the regenerated power, nor the residual 15% in the battery so, in reality, things should be a bit better. I won’t know for sure until I fill up and do the sums properly.