Source of variation

df

Diesel oil

SAE 40 used oil

SAE 50 used oil

p

f

p

f

p

f

Bacterial strain

1

<0.0001

s

0.031

s

0.000

s

Surfactant

1

0.995

ns

0.030

s

0.112

ns

Bacterial strain x surfactant

3

<0.0001

s

0.009

s

<0.0001

s