Trawling about through what I have found to be the normally reliable Formula 1 chassis allocations in 'Autocourse' annual - in this case covering the 2015 season - I have established that their published Force India VJM018 record is incorrect.
Of course in the real world out there this is entirely inconsequential but just to correct the publicly-available record - for we sad obsessives - 'Autocourse's listed references to Sergio Pérez using the same chassis - serial 'VJM08-02' for every round of that season's World Championship is wrong.
The full works running log includes the following information:
The same chassis were used in sequence for the Australian, Malaysian, Chinese, Bahrain, Spanish, Monaco, Canadian and Austrian GPs:
VJM8-01 (sic) - Hulkenberg
VJM8-02 (sic) - Pérez
This matches the 'Autocourse' listing, which thereafter goes a bit wobbly...
British and Hungarian GPs are confirmed by the factory record as having been contested by these allocations -
VJM8-02 - Pérez
VJM8-03 - Hulkenberg
While Hulkenberg retained VJM8-03 for the Belgian, Italian, Singapore, Japanese, Russian, United States, Mexican, Brazilian and Abu Dhabi GPs, 'Checo' Pérez changed from chassis VJM8-02 to VPJ8-01 after Hungary, driving the latter car (contrary to the 'Autocourse' listing) in the Belgian, Italian, Singapore, Japanese and Russian GPs.
Only then did he return to his early-season car, VJM8-02, for the final four races of the year - in the USA, Mexico, Brazil and 'Aberdovey'.
For the real detail hounds, total chassis mileages for the Force India-Mercedes VJM8 (or 'VJM08') cars that year were recorded by the factory under two headings, one for 'Test', another for 'Race'. These mileages might make a few eyes pop at how much torture the cars endured:
Under 'Test' heading:
VJM8-01 - First Practice 1; 1,402 miles - First Practice 2; 1,687 miles - Test; 2,693 miles - Total 5,781 miles.
VJM8-02 - First Practice 1; 1,494 miles - First Practice 2; 1,692 miles - Test; 950 miles - Total 4,136 miles.
VJM8-03 - First Practice 1; 1,017 miles - First Practice 2; 1,381 miles - Test; 845 miles - Total 3,243 miles.
'Test' totals - FP1 3,913 miles - FP2 4,760 miles - Test 4,487 miles - Overall Test Totals 13,160 miles.
Under 'Race' heading (which includes First Practice 3 and Qualifying):
VJM8-01 - First Practice 3; 1,059 miles - Qualifying; 998 miles - Race; 3,855 miles - Total 5,912 miles.
VJM8-02 - First Practice 3; 1,231 miles - Qualifying; 990 miles - Race; 4,306 miles - Total 6,527 miles.
VJM8-03 - First Practice 3; 1,064 miles - Qualifying; 963 miles - Race; 2,460 miles - Total 4,488 miles.
'Race' totals - FP3 3,354 miles - Qualifying 2,952 miles - Race 10,622 miles - Overall 'Race' Totals 16,927 miles
Drivers involved throughout all this running were:
Sergio Pérez - Testing 5,618 miles - Race 9,103 miles - Overall 14,721 miles
Nico Hulkenberg - Testing 6,127 miles - Race 7,825 miles - Overall 13,951 miles
Pascal Wehrlein - Testing 1,097miles - Overall 1,097 miles
Martin Brundle - Testing 94 miles - Overall 94 miles
Nick Yelloly - Testing 507 miles - Overall 507 miles
Esteban Ocon - Testing 771 miles - Overall 771 miles
Alfonso Celis Jr - Testing 361 miles - Overall 361 miles
So there you go; rather more about the 2015 Force India-Mercedes VJM8 cars than perhaps you ever wanted to know. But I thought this provides an interesting insight into the running that modern-era midfield Formula 1 cars endure during a 21st century World Championship career.
Edited by Doug Nye, 01 September 2022 - 18:03.