I have Dodge Caravan 2.4L 97 model, is it okay if I use Bosh Super 4 plugs? for my caravan.

 

It's probably OK but whether they will give a gain over regular spark plugs is probably not.

The extra ground electrodes will mask the flame front and hinder ignition.Those same electrodes will also keep the fuel air mixture from getting to the firing electrode.
Only one electrode can possibly fire since electricity always takes the path of least resistance.That leaves three metal prongs sticking up in the path of the fuel air mixture.The extra ground straps still erode at the same speed as the firing electrode,so there's nothiong to be gained as far as longer life.

Stick with double platinum plugs,they give good performance and long life.

 

I did not find any MPG gain on a 1995 Magnum 5.9V8 in a Ram
with the Bosch +4 sparkplug...and I fooled around with them alot,
even cutting off one electrode to make them +3

Consumer's Reports tested them in Hondas and found no MPG gain either.

 

Thank You for all your replys brother, you help me alot.

 

I never beilieved that they were actually meant for better MPG except when the plugs were older. I just thought the 4 prongs were mostly for longevity since even if 3 get corrosive or covered in carbon deposits, as stated before, the spark will take the path of least resistance, therefore it should keep on firing in comparison to one prong fouling early. However, if one should do proper maintenance, that shouldn't happen even with spark plugs that only have one prong.

 

With 4 ground prongs
one of them ends up close to the exhaust valve...which is hot
and if you run the Bosch+4 sparkplugs for several thousand miles
and then inspect them
you will find that the spark is jumping
from the 'hot' prong nearest that exhaust valve

This, along with the big gap (0.060 inches)
may make for slightly advanced ignition timing in the 'real world'

 

my rule of thumb is if the ignition system is stock. keep it that way.