2000 Ford Focus

CLAYJUNKIE33

MEMBER
2000 FORD FOCUS
6 CYL
FWD
AUTOMATIC
48,000 MILES

What will happen if you put 84 octane in a car that is not meant to have anything lower than 86?

Sunday, June 29th, 2008 AT 2:00 PM

1 Reply

KHLOW2008

MECHANIC
41,815 POSTS

Hi clayjunkie33,

The engine tends to ping under load which will be taken care off by the knock sensor but it might cause the check light to come on. Engine ignition timing will be retarded by the ECM so you will have lesser power on tap.

Other than that there is not much of a problem.