Eurobricks
“The race mechanic accessory was pretty straight forward, but the refueling equipment plus the chemicals had a great look in spite its size. As expected from Lego Ferrari sets (and as seen in the minifig parts), this would require stickers on their torsos. Not using them... More would just make the minifigs "generic".”
Brickipedia
“The set comes with three minifigures: a Ferrari Race Mechanic, a Ferrari Refueling Engineer and a Shell Track Scientist. The Ferrari Race Machanic has his helmet, torso, arms, hips and legs in red. The Ferrari Refueling Engineer has the same hairpiece as Green Lantern. The... More Shell Track Scientist comes with a laboratory rock and multiple Shell fuel samples.”
Full review at brickipedia.fandom.com