12th Place Finish Ratio

until 1988 Japanese 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	6.67%	1	15
3	Francis	5.88%	2	34
4	Jaguar	5.56%	1	18
5	Amilcar	4.00%	1	25
6	Zakspeed	3.92%	4	102
7	Riley	3.70%	2	54
8	Simca	2.94%	1	34
9	Porsche	2.89%	5	173
10	Aston Martin	2.78%	1	36
11	Chevrolet	2.65%	12	453
12	Ford	2.41%	127	5261
13	Veritas	2.30%	2	87
14	Delahaye	2.29%	3	131
15	Megatron	2.17%	2	92
16	Alfa Romeo	2.16%	17	786
17	Matra	2.16%	4	185
18	Frazer-Nash	2.13%	1	47
19	MG	2.04%	1	49
20	Climax	1.90%	40	2100
21	BRM	1.76%	20	1139
22	Bristol	1.65%	5	303
23	Cosworth	1.64%	15	915
24	Talbot-Lago	1.47%	5	339
25	Connaught	1.45%	2	138
26	Delage	1.39%	1	72
27	Motori Moderni	1.25%	1	80
28	Talbot	1.22%	1	82
29	Alta	1.03%	4	387
30	Maserati	1.03%	17	1658
31	Renault	1.02%	5	491
32	Hart	0.90%	2	223
33	ERA	0.88%	2	227
34	Ferrari	0.86%	14	1635
35	Cisitalia	0.85%	1	117
36	Lea-Francis	0.83%	1	120
37	Honda	0.72%	2	277
38	Simca-Gordini	0.60%	1	167
39	Repco	0.55%	1	181
40	Gordini	0.43%	1	232
41	BMW	0.39%	2	518

Finishing position: