I now have 12890 km (8009 miles) on my bone stock 1958 LC. I recently did a highway trip of 520 km (323 miles) at minus 21C (-5.8F) with almost a constant 120km/h (74.5 m/h) speed & 91 octane gas - which I've used since new - set on ECO mode. Average gas mileage was 10.7L/100km (21.98 mpg). In considerably warmer weather I've managed considerably better fuel economy when keeping the speed down & did this same trip in August in heavy traffic so speed was just over 90km/h (56m/h) and achieved 7.7L/100km or 30.5mpg. I had a 2022 Tacoma SR5 and it was heavy on gas and on a good day in slow traffic on the same trip, it could manage its best at about 9.5L/100km or 24.7mpg but had to keep the speed just under 90km/h or it would get real thirsty. I changed out the stock tires on the Tacoma about a year before selling it to Goodrich Advantage Sport - All Weather tires. By my estimate this increased my gas consumption considerably such that highway mileage - same trip - decreased to around 12L/100km or 19.6 mpg. Your 4 factors for fuel economy are speed, ambient temperature, load, and tires. The best mileage the 1958 LC will get, in my opinion, is stock, speed under 100 km/h, warm weather, one passenger, original tires and when you change any of these factors expect to get decreased fuel economy. So far I'm happy with the LC except for the small fuel tank as I pull a travel trailer - sometimes for very long trips in some areas where 91 octane gas is almost impossible to find, so I expect to be strapping some gas cans somewhere or if an auxiliary fuel tank becomes a reasonable option Only other complaint is the usual gripe about Apple CarPlay - it needs Toyota to pay attention to customer complaints.
