Percentage of Zinc Content of 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
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