EXHIBIT 11 




                       TOSCO CORPORATION AND SUBSIDIARIES
                      COMPUTATION OF EARNINGS PER SHARE (a)
                                   (Unaudited)
                  (Thousands of Dollars, Except Per Share Data)
                                                                                        
                                                                       Three Months Ended June 30,      Six Months Ended June 30, 
                                                                         1997                  1996       1997            1996   
                                                                                                               
 Income before distributions on company-obligated, mandatorily  
   redeemable, convertible preferred securities                        $69,635               $49,638      $75,720        $73,604 
 Distributions company-obligated, mandatorily redeemable,  
   convertible preferred securities, net of income tax benefit           2,523                 -            5,046           -   
                                                                       --------              -------     --------       --------
 Net income                                                           $67,112               $49,638      $70,674        $73,604 
                                                        
 PRIMARY EARNINGS PER SHARE                                                     
                                                        
 Earnings used for computation of primary earnings per share          $67,112               $49,638      $70,674        $73,604 
                                                        
 Weighted average number of shares outstanding during the period  152,491,892           117,870,768   141,833,861   114,803,490 
 Assumed conversion of common share equivalents                     4,393,690             3,045,438     4,323,624     2,768,145 
                                                                 --------------         ------------  ------------  ------------
 Weighted average common and common equivalent shares used                                                      
   for computation of primary earnings per share                  156,885,582           120,916,206   146,157,485   117,571,635 
                                                                 --------------        -------------  ------------  ------------ 
 Primary earnings per common and common equivalent share                $0.43                 $0.41         $0.48         $0.63 
                                                                 =============         =============  ============  ============
                                                        
 FULLY DILUTED EARNINGS PER SHARE (b)                                                   
                                                        
 Earning used for computation of fully diluted earnings per share     $67,112               $49,638       $70,674      $73,604 
                                                                --------------         -------------   ----------- -------------
 Weighted average number of shares outstanding during the period  152,491,892           117,870,768   141,833,861  114,803,490 
 Assumed conversion of common share equivalents                     4,393,690             3,096,894     4,355,426    3,096,894 
                                                        
 Weighted average common and common equivalent shares used                                                      
   for computation of fully diluted earnings per share            156,885,582           120,967,662   146,189,287  117,900,384 
                                                                --------------          ------------- ------------ ------------
 Fully diluted earnings per common and common equivalent share          $0.43                 $0.41         $0.48        $0.62 
                                                        
                                                        
 (a)  Earnings per share and weighted average shares outstanding 
      reflect the 3-for-1 stock split declared and distributed in February 1997.                                                 
                                                        
 (b)  Conversion of the company-obligated, mandatorily redeemable, 
      convertible preferred securities is not assumed at June 30, 1997 because 
      its effect on earnings per share is not significant and because
      the conversion rate, equivalent to a conversion price of approximately 
      $32.92 per Common Stock share, was higher than the average 
      market price of the Common Stock for the three and six month periods 
      ended June 30, 1997.