After all these years, it's a trap we still fall into, focussing on the name at the top of the timesheets and in particular his time.

However, it's no use being the quickest out there if you are not going to go the distance... as the old adage goes, 'to finish first, first you have to finish'.

That said, as has become the norm in recent years the name at the top of the sheets in terms of times is also right up there in terms of reliability.

Due to his 'electrical issue' on Thursday, not only has Lewis Hamilton missed out on the fastest time of the week in Barcelona, he has also lost out in terms of covering the most mileage, both honours going to teammate Valtteri Bottas, the Finn not only being fastest but completing 324 laps, 57 more than his nearest rival, Sebastian Vettel..

While Mercedes and Ferrari covered well over a thousand miles over the four days, McLaren could only manage 601 and Toro Rosso 529, and bear in mind, the average Grand Prix is around 190 miles (310kms) and this year drivers are limited to 4 units before incurring penalties.

Between them the Mercedes powered teams managed 1049 laps, with Ferrari second best on 810, Honda - albeit only supplying one team - couldn't manage 200.

The times are important, but even more so is reliability, and once again Mercedes is showing ominous strength in both areas.

Engine Manufacturer Test Mileage

Engine Manufacturer	Laps	Miles	Kms
Mercedes	1049	3034.2	4883.0
Ferrari (17)	810	2342.9	3770.5
Renault	770	2227.2	3584.3
Ferrari (16)	349	1009.5	1624.6
Honda	208	601.6	968.2

Team Test Mileage

Team	Laps	Miles	Kms
Mercedes	558	1614.0	2597.4
Ferrari	468	1353.7	2178.5
Sauber	349	1009.5	1624.6
Haas	342	989.2	1592.0
Red Bull	294	850.4	1368.5
Renault	293	847.5	1363.9
Force India	278	804.1	1294.1
Williams	213	616.1	991.5
McLaren	208	601.6	968.2
Toro Rosso	183	529.3	851.8

Driver Test Mileage

Driver	Team	Laps	Miles	Kms
Bottas	Mercedes	324	937.2	1508.2
Vettel	Ferrari	267	772.3	1242.9
Hamilton	Mercedes	234	676.8	1089.2
Raikkonen	Ferrari	201	581.4	935.6
Ericsson	Sauber	198	572.7	921.7
Verstappen	Red Bull	174	503.3	810.0
Grosjean	Haas	174	503.3	810.0
Magnussen	Haas	168	485.9	782.0
Giovinazzi	Sauber	151	436.8	702.9
Hulkenberg	Renault	150	433.9	698.2
Palmer	Renault	143	413.6	665.7
Perez	Force India	121	350.0	563.2
Ricciardo	Red Bull	120	347.1	558.6
Stroll	Williams	110	318.2	512.0
Vandoorne	McLaren	107	309.5	498.1
Massa	Williams	103	297.9	479.5
Alonso	McLaren	101	292.1	470.1
Kvyat	Toro Rosso	100	289.3	465.5
Ocon	Force India	86	248.8	400.3
Sainz	Toro Rosso	83	240.1	386.4
Celis	Force India	71	205.4	330.5

Best Times Week 1

Date	Driver	Team	Tyres	Time	Gap
01-Mar	Bottas	Mercedes	US	1:19.705	130.481 mph
01-Mar	Vettel	Ferrari	S	1:19.952	0.247
02-Mar	Raikkonen	Ferrari	S	1:20.872	1.167
28-Feb	Hamilton	Mercedes	SS	1:20.983	1.278
01-Mar	Ricciardo	Red Bull	S	1:21.153	1.448
01-Mar	Palmer	Renault	S	1:21.396	1.691
02-Mar	Verstappen	Red Bull	S	1:21.769	2.064
01-Mar	Hulkenberg	Renault	S	1:21.791	2.086
01-Mar	Ericsson	Sauber	SS	1:21.824	2.119
27-Feb	Massa	Williams	S	1:22.076	2.371
01-Mar	Grosjean	Haas	SS	1:22.118	2.413
28-Feb	Magnussen	Haas	SS	1:22.204	2.499
28-Feb	Stroll	Williams	S	1:22.351	2.646
02-Mar	Giovinazzi	Sauber	US	1:22.401	2.696
28-Feb	Ocon	Force India	SS	1:22.509	2.804
02-Mar	Perez	Force India	US	1:22.534	2.829
02-Mar	Vandoorne	McLaren	US	1:22.576	2.871
01-Mar	Alonso	McLaren	US	1:22.598	2.893
28-Feb	Kvyat	Toro Rosso	S	1:22.956	3.251
27-Feb	Bottas	Mercedes	S	1:23.169	3.464
01-Mar	Sainz	Toro Rosso	M	1:23.540	3.835
01-Mar	Celis	Force India	US	1:23.568	3.863