I am just wondering if anyone has tried the Bosch plus four plugs and if they made a difference in mileage at all ? I know they did nothing for my Toyota 4cyl but am curious to see how they work in my 5.9

I've already added a K&N and will soon add an intake kit and and tinker with the exhaust

 

I paid the extra $$$ for them and in my opinion they are not worth it. I haven't noticed any difference in mileage or hp.

 

I've had them in my Jeep, and my Ram and wont get them again... get the NGK's instead

 

Never had them in a V8 but I put them in my '94 Del Sol and it ran like dog Sh** until I put NGKs in instead.

 

Thanks for the replies guys, Just regular platinum NGK ?

 

get these...NGK ZR5F-11 plugs

 

Thanks, I'll give them a shot.

 

CHAMPION PLUGS ARE THE BEST PLUGS TO USE.

 

I used platinum plugs in my truck and at times it ran worse. I used the bosch times four, and had bad gas milage and no horsepower. I changed to the plugs that is recommended for the truck. The plugs are champion truck plugs. try them and let me know how it runs.

 

Electricity is going to take the shortest path available to it. The split plugs are gimmics. A good set of regular plugs work just as well as anything else.