i bought the ruthenium plugs because they were cheaper than the double iridiums. if the spark plug conducts electricity and has the proper gap then it'll work perfectly, until it wears down an the gap is too big.
Iridium Plugs and Gas Mileage
- Thread starter ford46guy
- Start date
The phasors on the Ford 6.2L are a different design. They do not operate on oil pressure. The operate using the tension of the valve springs pushing the cam forward or backwards. The solenoid opens just to fill the void split with oil, and the cam is rephased. There is no AFM either. It replaces EGR, which could have issues too.
Very rare to find one that failed.
pointy plugs run better, it may require less fuel.
but pointy plugs would wear quickly, therefore special metals.
with new engines already have pointy ir plugs, you cant buy fat plugs for new car.
in old car i tried https://www.brisk.eu/catalogues/spark-plugs/premium-zc-zs
but this ran better
but pointy plugs would wear quickly, therefore special metals.
with new engines already have pointy ir plugs, you cant buy fat plugs for new car.
in old car i tried https://www.brisk.eu/catalogues/spark-plugs/premium-zc-zs
but this ran better
4WD
$50 site donor 2024
If this continues - tiny SawsAll‘s will be developed and they will cut the tops off at motels …
I think the O.P. is simply going to have to try the Iridium plugs and see what happens. 16 plugs is an expensive experiment. The hope is to not get poorer MPG.
Some modern Ford engines are very sensitive to the exact spark plug, others not. Specifically EcoBoost. So perhaps that is what taught the O.P.'s Ford dealer to fear anything not Motorcraft?
Some modern Ford engines are very sensitive to the exact spark plug, others not. Specifically EcoBoost. So perhaps that is what taught the O.P.'s Ford dealer to fear anything not Motorcraft?
Correct. The only way to get better mileage is go to a design that has issues compared to what is essentially the best truck engine Ford came up with in decades is to go with the Ecos or GM/Ram and those issues are well documented . Spark plugs won’t gain much unless they’re worn down to nubs like my 6.0 Yukon was. Even then it was nothing miraculous. I’ve been down this rabbit hole before just for fun even though I knew what the outcome would be. I wish my GM 6.0s got better mileage but 15mpg at 75mph is pretty good for a 5500# vehicle.
- Joined
- May 16, 2021
- Messages
- 414
Put new Iridiums in my truck and, no gas mileage increase at all.
Was hoping but, didn't happen.
The Ford place said they had a comeback once with different plugs, and possibly thousands of no issue for the fleet 6.2L with a 100K spark plug interval (the required plug). According to them some of those trucks see 500K.
According to them the size will interchange but SP526 is made special for that truck. Likely will use that, the price is right too. Denso 4719 actually interchanges with all F150 engines made in 11. (incl the Eco).
My ford takes platinum from the factory. I switched to irridium plugs from almost new oem and saw +10% mpg and performance. I also have high voltage coils and ecu tuner which may have helped.
Computer controlled, injected engines and modern head designs don't have a problem igniting the mixture, pretty much any spark will do the trick.
You could probably make a spark plug out of a coat hanger, a cork and some aluminum foil and it would work.
So no plug will make a difference in mpg, since there is no leverage anymore at that point.
With a vintage motor, head/intake design, carb, traditional ignition etc. - yes, fiddling with plugs could make some difference, but not in a modern car.
You could probably make a spark plug out of a coat hanger, a cork and some aluminum foil and it would work.
So no plug will make a difference in mpg, since there is no leverage anymore at that point.
With a vintage motor, head/intake design, carb, traditional ignition etc. - yes, fiddling with plugs could make some difference, but not in a modern car.
Is it possible they are claiming the better mileage as the result of the electrodes being more wear resistant, thus keeping the plugs from misfiring longer than a 'standard' plug ?
This, all day long. The auto manufacturers are struggling to get even 1/100 MPG better mileage. If other brand plugs got better MPG don't you think that they would be using them?
Years ago when I had a lot of excess time on my hands, I bought a set of every brand plug that I could get and a tried them all in a couple of cars that I owned at the time. (Yes, I'm a discliple of Smokey Yunick.) The Autolite plugs were consistantly the best even though the manufacturer usually called for Champion plugs. I tried all of Platium and other gimmick spark plugs such as the ones that had two grounding electrodes but in an engine in good condition none of them gave any improvement over the Autolite plugs. Motorcaft and Autolite make excellant products IMO. If that's what you're vehicle calls for then IMO you should stick with them. OTH, you're free to experiment and then report your results back here.
Of course they advised not to, they can't make the extra money on the 200% markup for non Motorcraft parts.
I've been putting Ruthenium plugs in my fleet of Fords, same price as Iridium with better longevity.
NGK 90495 (Ruthenium, Fits pretty much every Ford) at Rockauto is $8.70. IR's are $4-$6. The Double Platinum OEM is $3.98.
And upgrading an ignition system to one with more power to the sparkplug results in more load on the alternator and that puts more load on the engine which could result in less MPG's.
If the existing ignition system is burning all the fuel properly then adding load to the engine would reduce MPG's.
Not true. The vehicle runs off of the battery not the alternator. The alternator just keeps the battery full.
