My wife picked up these plugs at NAPA. I've never seen anything posted on them here. Are they any good or do they need to go back?
Bosch Platinum2 Spark Plugs, Platinum Two Spark Plugs, Two Electrode Spark Plugs
I can't help wonder if they can stand up under our reverse polarity on the one bank.
Anyone ever used them?

 

got them , 12,000 km on them run great, I have been checking them every few thousand cause people here and on TRS say they are no good. I am picky and I am happy.

 

Spark Plugs, Ignition Performance
Found this article on the web while researching these plugs.
She also picked up a set of NAPA Beldon Max 8mm plug wires. These have gotten good reviews on other forums, so I guess I'll go with the combo.
A plug gap of .054?

 

Many here has not had good luck with Bosch (myself included), Autolites/Motorcraft are designed to for the Fords, but the Bosch tend to be a higher heat range, which will cause them to wear a little faster and the double electrodes and the thick ceramic shield around the tip tends to increase the compression which raises combustion temperatures further. I have used the Napa Belden wires (used on both my Moms Aerostar, and my Dad's Dakota) before and found they were not very good. I had to replace them because they caused misfires in my moms van. Only had them on for 10,000 miles or so. When I took them off, almost every clip tore out of the boot regardless of how careful I tried to be. When they dies I switched to Motorcraft and never had a problem again.

 

I find the tried and true autolites to work the best. Whether platinum or copper. **** the gimic multi electrode plugs.

 

any "multi prong" spark plug is a scam. Electricity will always follow the path of least resistance and will never fire on both prongs at the same time. At best you have 2 areas that have to foul before the plug starts to fail, at worst the extra prongs "shield" the air/fuel mixture. To get 2 sparks you have to have 2 ignition systems like the WWII bombers and such.

 

You do not gap dual prong, and I read on multiple Ford forums (this one too ) about the Ford "wasted spark" working well with dual electrode plugs.I have a 91 4.0L manual 3.73 gears and 31 10.50 15 X/T (nearly new ) I can get a best so far of 13 liters/100 kilometer ( 3.44 US gallons to 62 miles or 18 US mpg ) that is with 163, miles on the clock and I like to hear my cat back exhaust. The plugs have been in there for 10,k miles and for the first 4,000 due to thermostat, O2 sensor and pcm coolant temp sensor failures it was running very rich (not with thoses mileage figures ) , after the problems were fixed the plugs cleaned themselves up to a normal insulator color (not covered in soot black ). So I get 2 liters/100 kilometer less in hwy mileage then a brand new Ranger is rated for (3.4 mpg difference ). "Foul" , "gimick" maybe they are not engine in can but they seem at 10 k miles in to be robust and reliable, I will get back to you on durable. BTW how long do your plugs last in your Ford's gentlemen?

 

The only plugs that I've found to work well in fords and especially rangers are motorcraft and autolite. Anything else can be a waste of time and money. I've never been able to get any mileage out of a set of bosch in a ranger. Energy will take the path of least resistance reguardless of how many electrods a plug has. I tried the split fire thing when they first came out, 6 bucks a plug and still ended up going back to motorcraft with in 5,000 miles. There's no gemic to it, just get a set of MC or autolite and you will only have to do it once and save money in the process. Others like me have done the experimenting for you and wasted our money.

 

Agreed. Best plugs for our trucks is Motorcraft, or Autolite. Been there, done that, sticking with what works.

 

They may not work well in our Fords, but it wouldn't be right to call them a "scam". Some models of BMW come stock from the factory with them, so their engineers must have found something about them that they like...

 

Look, my dad's 1997 Ranger 2.3L is running factory plugs, and got 29.5 mpg on the last tank. This truck has not had plugs replaced in well over 100,000 miles, and the truck has over 300,000 on the odometer. Unless you've got a bum engine, there is no reason the truck should get the same economy as if it was new. The purpose of multi electrode plugs is to increase the usable life. But if the vehicle was not designed to use them, they shouldn't be used. Multi electrode plugs should only be used when recommended by the automaker.

 

Better check those plugs , pull one or two out and have a look at them because they are way over the interval from Ford for changing them

 

Yeah, gonna get them replaced very soon. But the point I'm trying to illustrate is that even though the vehicle is high mileage and a bit overdue for replacement it still gets the same fuel economy as it did when it was new, with the factory plugs.

 

"the Bosch tend to be a higher heat range, which will cause them to wear a little faster and the double electrodes and the thick ceramic shield around the tip tends to increase the compression which raises combustion temperatures further."
I live in the frozen north, indeed I had to run my furnace for a few minutes today to get the damp chill out. A hotter plug at a slightly higher compression seems like a good thind to me. Come winter and using crappy winterblend fuel that seems like a good idea to me.
It takes my truck a while to warm up when it is -20*f outside. Some mornings it's far colder.

 

20K on my autolite coppers and I'm still getting 22mpg in my beat up 3.0L v6 ranger