Toyota established a three-second buffer over the best of the LMP1 privateers in Friday morning practice for this weekend's Spa World Endurance Championship round.
At the wheel of the #7 Toyota TS050 Hybrid, Kamui Kobayashi delivered a 1m54.105s with 36 minutes left on the clock, beating last year's quickest qualifying time by three tenths.
That was enough to best the early-session benchmark laid down by Kazuki Nakajima in the #8 car, a 1m56.351s, by a full 2.2s.
Nakajima coasted back to the pits on electrical power only shortly after that, as Toyota simulated running out of fuel.
SMP Racing, which topped Thursday's running, cemented itself as the non-hybrid LMP1 squad to beat by locking out third and fourth positions behind the Toyotas.
Egor Orudzhev recorded the Russian squad's best time in the #17 BR Engineering BR1-AER, which was repaired overnight after Stephane Sarrazin's crash in FP2, a 1m56.842s.
WEC newcomer Stoffel Vandoorne posted the best time in the #11 car, a further six tenths back, ahead of the two Rebellion R-13 Gibsons.
Bruno Senna recorded the Swiss outfit's best time of 1m57.816s in the #1 car to go 1.8s up on the #3 machine of Nathanael Berthon.
The ByKolles LMP1 ended up slower than the entire LMP2 field, as Paolo Ruberti spent the majority of the hour-long session at the wheel of the ENSO CLM P1/01, which has a naturally-aspirated Gibson engine instead of a turbocharged Nissan this weekend.
G-Drive Racing was best of the LMP2 runners and seventh overall, thanks to a time of 2m01.143s by Jean-Eric Vergne in the team's Aurus-branded Oreca.
Will Stevens was seventh tenths down in the newly-reliveried #38 Jackie Chan DC Racing Oreca, while Gabriel Aubry was third-fastest in the sister #37 car.
Porsche and Ford locked out the top four positions in GTE Pro between them.
Gianmaria Bruni (pictured above) left it late to set the class benchmark of 2m13.945s in the #91 Porsche 911 RSR, beating Harry Tincknell's best effort in the #67 Ford GT by a little over two tenths.
The points-leading #92 Porsche, driven by Kevin Estre, was third ahead of Olivier Pla's #66 Ford and the two AF Corse Ferrari 488 GTEs.
Aston Martin could only manage seventh and ninth with its pair of Vantage GTEs despite leading the class early on, sandwiching the quicker of the BMW M8 GTEs.
Matteo Cairoli set the best time in GTE Am, a 2m15.190s, to beat Proton Porsche team-mate Matt Campbell by 0.190s.
|1||LMP1||M.Conway, K.Kobayashi, J.M.Lopez||Toyota Gazoo Racing||Toyota||1m54.105s|
|2||LMP1||S.Buemi, K.Nakajima, F.Alonso||Toyota Gazoo Racing||Toyota||2.246s|
|3||LMP1||S.Sarrazin, E.Orudzhev, S.Sirotkin||SMP Racing||BR Engineering/AER||2.737s|
|4||LMP1||M.Aleshin, V.Petrov, S.Vandoorne||SMP Racing||BR Engineering/AER||3.370s|
|5||LMP1||N.Jani, A.Lotterer, B.Senna||Rebellion Racing||Rebellion/Gibson||3.711s|
|6||LMP1||N.Berthon, T.Laurent, G.Menezes||Rebellion Racing||Rebellion/Gibson||5.559s|
|7||LMP2||R.Rusinov, J.van Uitert, J-E.Vergne||G-Drive Racing||Aurus/Gibson||7.038s|
|8||LMP2||D.H.Hansson, J.King, W.Stevens||Jackie Chan DC Racing||ORECA/Gibson||7.721s|
|9||LMP2||H-Pin Tung, G.Aubry, S.Richelmi||Jackie Chan DC Racing||ORECA/Gibson||8.725s|
|10||LMP2||R.Gonzalez, P.Maldonado, A.Davidson||DragonSpeed||ORECA/Gibson||8.864s|
|11||LMP2||F.Perrodo, M.Vaxiviere, N.Nato||TDS Racing||ORECA/Gibson||8.968s|
|12||LMP2||F.van Eerd, G.van der Garde, N.de Vries||Racing Team Nederland||Dallara/Gibson||9.295s|
|13||LMP2||N.Lapierre, A.Negrao, P.Thiriet||Signatech Alpine Matmut||Alpine/Gibson||9.761s|
|14||LMP2||E.Creed, R.Ricci, N.Boulle||Larbre Competition||Ligier/Gibson||11.482s|
|15||LMP1||T.Dillmann, O.Webb, P.Ruberti||ByKOLLES Racing Team||ENSO CLM/Gibson||11.592s|
|16||GTE Pro||R.Lietz, G.Bruni||Porsche GT Team||Porsche||19.617s|
|17||GTE Pro||A.Priaulx, H.Tincknell||Ford Chip Ganassi Team UK||Ford||19.840s|
|18||GTE Pro||M.Christensen, K.Estre||Porsche GT Team||Porsche||20.159s|
|19||GTE Pro||S.Mucke, O.Pla||Ford Chip Ganassi Team UK||Ford||20.375s|
|20||GTE Pro||D.Rigon, S.Bird||AF Corse||Ferrari||20.421s|
|21||GTE Pro||A.P.Guidi, J.Calado||AF Corse||Ferrari||20.512s|
|22||GTE Pro||A.Lynn, M.Martin||Aston Martin Racing||Aston Martin||20.590s|
|23||GTE Pro||A.Farfus, A.F.da Costa||BMW Team MTEK||BMW||20.754s|
|24||GTE Pro||M.Sorensen, N.Thiim||Aston Martin Racing||Aston Martin||21.044s|
|25||GTE Am||G.Roda, G.Roda, M.Cairoli||Dempsey-Proton Racing||Porsche||21.085s|
|26||GTE Am||C.Ried, R.Pera, M.Campbell||Dempsey-Proton Racing||Porsche||21.275s|
|27||GTE Pro||M.Tomczyk, N.Catsburg||BMW Team MTEK||BMW||21.334s|
|28||GTE Am||J.Bergmeister, P.Lindsey, E.Perfetti||Team Project 1||Porsche||21.490s|
|29||GTE Am||S.Yoluc, E.Hankey, C.Eastwood||TF Sport||Aston Martin||22.168s|
|30||GTE Am||P.D.Lana, P.Lamy, M.Lauda||Aston Martin Racing||Aston Martin||22.211s|
|31||GTE Am||M.Ishikawa, O.Beretta, E.Cheever||MR Racing||Ferrari||22.724s|
|32||GTE Am||T.Flohr, F.Castellacci, G.Fisichella||Spirit of Race||Ferrari||22.738s|
|33||GTE Am||L.P.-Companc, M.Cressoni, M.Griffin||Clearwater Racing||Ferrari||22.841s|
|34||GTE Am||M.Wainwright, B.Barker, T.Preining||Gulf Racing||Porsche||24.052s|