Best penetrating oil for cars in 2021

By CNET
Kroil
"The best overall penetrating oil"
PB B'laster
"The best spray-can penetrating oil"
Liquid Wrench
"The best value-priced penetrating oil"
Knock'er Loose Plus
"The best fast-acting penetrating oil"
Free All
"The best paint-safe penetrating oil"
WD-40 Specialist Penetrant
"The best name-brand penetrating oil"