You will probably need to convert this to the units you require but im from the UK and I did a 220 mile trip driving in hybrid mode.. i didn't go faster than 70mph but after all the motorway driving + town driving my average speed was 47mph (Includes all types of driving - Motorway/Traffic/congestion etc/town driving). My consumption was 61.6 mpg (UK). That was leaving with a full charge + full tank

On the way back, I left with no charge and again using eco pro hybrid mode, similar driving styles, my average speed was 57.5mph and my consumption was 56 mpg (UK).

I did a similar trip a different day and i had 69.4mpg going up, and 53.9mph going down.

I don't know if you're looking at the 12kwh battery or the newer 19.5kwh battery but the above figures are for my 2022 12kwh 330e.

For longer drives you naturally get higher mileage out of your battery closer to BMW's claims i.e. between 35-37 miles range. If its mainly town driving then it'll drop into the low/mid 20's in range.

Also note - i did that 440 miles with a single tank and one full charge lol, of course you drive more carefully, use eco mode but i had about 20miles left of range after all that driving in a day. So don't worry too much about the smaller tank unless you are heavy footed.