Makowiecki posted 1m40.404s in the #5 Porsche 963 LMDh just under an hour into the Tuesday afternoon session of the pre-season test ahead of this weekend’s series opener.
The time from the factory Penske Porsche Motorsport driver gave him a margin of two tenths over second-placed Alex Lynn in the Ganassi-run Cadillac Racing entry.
Lynn jumped to second in the times in the Cadillac V-Series.R during a late flurry of improvements as temperatures cooled at the end of the three-hour session on the Losail International Circuit.
He set a 1m40.621s and then improved to a 1m40.458s to get within six hundredths of Makowiecki.
Yifei Ye moved up moved up to third in the customer AF Corse Ferrari 499P Le Mans Hypercar courtesy of a 1m40.749s with 15 minutes left on the clock.
The time promoted him ahead of the AF-run factory #51 Ferrari in which Antonio Giovinazzi posted a 1m40.926s late on after losing a slightly faster time to a track-limits violation.
Antonio Fuoco put the second factory Ferrari fourth with a 1m40.968s little more than five minutes before the chequered flag.
Laurens Vanthoor was another late improver in the second PPM 963, a series of quick laps ending with a 1m41.036s that was good enough for sixth.
Source: Autosport