
Kobayashi made the comments after the pair of Toyota GR010 HYBRID Le Mans Hypercars ended up 13th and 15th in the combined times from the four sessions of the Prologue test on Monday and Tuesday at the start of race week for the Qatar 1812Km WEC season-opener.
He explained that Toyota struggled with graining of its Michelin tyres on the smooth surface of the 3.37-mile Losail International Circuit, which was resurfaced for last year.