12th Place Finish Ratio

until 1997 Brazilian GP

Include Indy 500 races
Ignore non-championship races
Note: records involving non-championship races may be inaccurate due to incomplete data.

Finishing position:

Pos	Engine Manufacturer	12th Place Finish Ratio	12th Place Finishes	Entries
1	Smith-Chevrolet	20.00%	1	5
2	Osella	6.25%	1	16
3	Francis	5.88%	2	34
4	Jaguar	5.56%	1	18
5	Lamborghini	5.47%	14	256
6	Amilcar	4.00%	1	25
7	Zakspeed	3.85%	4	104
8	Ilmor	3.75%	6	160
9	Riley	3.70%	2	54
10	Yamaha	3.04%	7	230
11	Simca	2.94%	1	34
12	Aston Martin	2.78%	1	36
13	Porsche	2.70%	5	185
14	Chevrolet	2.65%	12	453
15	Hart	2.52%	9	357
16	Ford	2.32%	155	6684
17	Veritas	2.30%	2	87
18	Delahaye	2.29%	3	131
19	Alfa Romeo	2.16%	17	786
20	Matra	2.16%	4	185
21	Megatron	2.13%	2	94
21	Frazer-Nash	2.13%	1	47
23	MG	2.04%	1	49
24	Climax	1.90%	40	2100
25	Mugen-Honda	1.81%	3	166
26	BRM	1.76%	20	1139
27	Bristol	1.65%	5	303
28	Cosworth	1.64%	15	915
29	Peugeot	1.53%	2	131
30	Judd	1.49%	6	403
31	Talbot-Lago	1.47%	5	339
32	Connaught	1.45%	2	138
33	Delage	1.39%	1	72
34	Motori Moderni	1.25%	1	80
35	Talbot	1.22%	1	82
36	Renault	1.20%	11	918
37	Ferrari	1.06%	21	1989
38	Alta	1.03%	4	387
39	Maserati	1.03%	17	1658
40	Honda	0.91%	4	441
41	ERA	0.88%	2	227
42	Cisitalia	0.85%	1	117
43	Lea-Francis	0.83%	1	120
44	Simca-Gordini	0.60%	1	167
45	Repco	0.55%	1	181
46	Gordini	0.43%	1	232
47	BMW	0.39%	2	518

Finishing position: