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SX455

The official club for enthusiasts of the

1970 & 1971 Oldsmobile Cutlass Supreme SX

 



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Bob Peters
SX455 Club President
SX QUESTONS?
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Bob@SX455.com

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HomeProduction Numbers

SX Production Numbers as of November 2016

Year

Hardtops
(style 4257)

Convertibles
(style 4267)

Total for
Both Styles

1970*

6,404

793

7,122

1971

1,820

357

2,177

Total for
Both Years

8,224

1,150

9,374

 

 

Jerry Wilson's SX Production Research (October 2016) 

 

 

Month

Cumulative

Monthly

July

No Data -------------

June

7122

231

May

6891

276

April

6615

441

March

6174

292

February

5882

276

January

5605*

710

December

4895*

739

November

4156*

877

October

3280

1057

September

2223

1488

August

735

735

 

* These are from the GM Archives – but differ from the actual numbers.
 
 
Year  Options   Notes
 1970  Cutlass Supremes with SX Option Y79  7,122   Holiday Coupes & Convertibles 
 1970  Cutlass Supremes with Engine L33 6,724   Holiday Coupes & Convertibles & Holiday Sedans
 1970  Cutlass Supremes with Engine L31 746  Holiday Coupes & Convertibles
 1970    Cutlass Supremes with Engine W32 852  Holiday Coupes & Convertibles
 1970 Other Cutlass Models with L33 916

The preceding summary shows that there were 8,322 Cutlass Supremes built with 455s (L33+L31+W32) but only 7,122 were SXs.  That indicates that there were 1,200 Cutlass Supremes built with 455s (L33s) but did not have the cutouts in the rear bumper, exhaust trumpets, or the SX badge on the front fenders (option Y79).

NOTE: From Terry Divelbliss (May 6, 2019 Facebook post) "The Y-79 SX production number straight from the Oldsmobile mainframe printouts is 7,122 (9.4% of 4200 series production) through June 1970. 231 (2.8% of 4200 series production) were built in June. There were still a couple weeks of 1970 production left into mid-July, so a few more certainly were built. Kurt Shubert provided that info to me in 2012"

 

Note:  Option L33 was available until February 24, 1970 – and was replaced with the L31 effective February 25, 1970.  Concurrently, the L31 was not available with the Holiday Sedan or the Cutlass S. 


PREVIOUS PRODUCTION NUMBERS
PRIOR TO  NOVEMBER 2016

Year

Hardtops
(style 4257)

Convertibles
(style 4267)

Total for
Both Styles

1970*

6,404

793

7,197

1971

1,820

357

2,177

Total for
Both Years

8,224

1,150

9,374


*There is no reliable data for the number of 1970 Cutlass SX cars produced
with each of the three available engines options for 1970 (L-31, L-33, W32).

Previously published figures claimed 1,025
W-32 cars built,
but an April, 2010 finding from the GM Heritage Center prove 862 W-32s
were produced for the first 11 months of the 1970 production year.



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