EVO XFo

Transformer Oils

EVO XFo is a transformer oil created on a biotechnology platform originating from Plant Sugars. EVO XFo will display a high level of oxidative stability, dielectric strength and heat transfer capability over a wide range of temperatures and under heavy electrical stress. As a biodegradable hydrocarbon, EVO XFo is designed to extend the life and value of a transformer. EVO XFo is a mineral oil drop-in that conforms to all ASTM D3487, IEC 60296, and OECD 301B standards.

Transformer Oil Comparison

Oxidation Stability Under Electrical Test



Property ASTM ASTM D3487

EVO XFo

Mineral Oil
(Type II)

Vegetable Oil

Aniline Point °C 

D-611 

63/84 

113.5 

72.2 

–– 

Color 

D-1500 

0.5 max 

L0.5 

L0.5 

L0.5 

Flash Point °C 

D-92 

145 min 

178 

151 

330 

Interfacial Tension 

   @ 25 °C dynes/cm 

D-971 

40 min

45 

45 

27 

Pour Point °C 

D-97 

-40 max 

-57 

-54 

-21 

Spec. Grav. 15°C/15°C 

D-1298 

0.91 max 

0.818 

0.8938 

0.96 

Viscosity cSt (SUS) 

D-445 

   @ 100 °C 

3.0 max 

3

2.46

7.9

   @ 40 °C 

12.0 max 

11.7 

9.6

32.7

   @ 0 °C 

76.0 max 

64.2 

75.2 

187 

Appearance 

D-4176 

Clear & Bright 

Clear & Bright 

Clear & Bright 

Clear & Bright 

Dielectric Breakdown kv 

D-877 

30 min 

49

40

47 

Gassing Tendency uL/min 

D-2300B 

30 max 

-2 

20 

-79 

Power Factor @ 60 Hz, % max 

D-924 

   @ 25 °C 

0.05 max 

0.001 

0.005 

0.05 

   @ 100 °C

0.30 max 

0.01 

0.114 

–– 

Oxidation Inhibitor Content 

D-2668 

0.3 

0.26 

–– 

Oxidation Stability 

D-2440 

   % Sludge, by Mass

0.1 max 

< 0.01 

0.001 

–– 

Rotary Bomb Oxidation minutes 

D-2112 

195 min 

> 550 

252 

37 

Water ppm 

D-1533 

35 max 

9

10 

55 

Neutralization Number mg KOH/g 

D-974 

0.03 max 

< 0.01 

0.01 

0.03