What does EFN stand for?
EFN stands for "Engine Friendliness Number"
How to abbreviate "Engine Friendliness Number"?
"Engine Friendliness Number" can be abbreviated as EFN
What is the meaning of EFN abbreviation?
The meaning of EFN abbreviation is "Engine Friendliness Number"
What does EFN mean?
EFN as abbreviation means "Engine Friendliness Number"
