Due to the sports environmental appeal they have moved to much smaller engines, that are way more power efficient than they used to (1.6lit V6 hybrids) . I don’t believe that they actually could run a whole race without refueling, in the earlier eras.
Further more they have added a limit on how many tires they can use per weekend (and per season) as well as how many engines and engine parts. In the “old” days they’d use a brand new engine for qualifying and discard it for a new one for the actual race. I belive that they are down to 3 engines per driver for the whole season.
Due to the sports environmental appeal they have moved to much smaller engines, that are way more power efficient than they used to (1.6lit V6 hybrids) . I don’t believe that they actually could run a whole race without refueling, in the earlier eras.
Further more they have added a limit on how many tires they can use per weekend (and per season) as well as how many engines and engine parts. In the “old” days they’d use a brand new engine for qualifying and discard it for a new one for the actual race. I belive that they are down to 3 engines per driver for the whole season.