Percentage of Zinc Content for Popular Oils

Some popular motor oils and thier zinc content as a percentage. Oil for older engines should have a minimum zinc content of .11%.

20W-50

  • Castrol GTX .12
  • Exxon High Performance .11
  • Kendall GT-1 .16
  • Shell Truck Guard .15
  • Spectro Golden 4 .15
  • Spectro Golden M.G. .13
  • Unocal .12
  • Valvoline All Climate .11
  • Valvoline Turbo .13
  • Valvoline Race .20

15W-50

  • Chevron .11
  • Mystic JT8 .15

20W-40

  • Castrol Multi-Grade .12

15W-40

  • Castrol .14
  • Exxon XD3 .14
  • Exxon XD3 Extra .13
  • Kendall GT-1 .16
  • Mystic JT8 .15
  • Shell Rotella w/XLA .13
  • Valvoline All Fleet .15
  • Valvoline Turbo .13

10W-30

  • AMSOIL (old) none
  • AMSOIL (new) none
  • Castrol GTX .12
  • Chevron Supreme .11
  • Exxon Superflo Hi Perf 135 .11
  • Exxon Superflo Supreme 133 .13
  • Kendall GT-1 .16
  • Shell Super 2000 .13
  • Shell Truck Guard .15
  • Unocal Super .12
  • Valvoline All Climate .11
  • Valvoline Turbo .13
  • Valvoline Race .20

5W-30

  • Castrol GTX .12
  • Chevron Supreme .11
  • Chevron Supreme Synt. .12
  • Exxon Superflow HP .11
  • Shell Fire and Ice .12
  • Unocal .12
  • Valvoline All Climate .11
  • Valvoline Turbo .13
  • Valvoline Synthetic .12