Originally Posted By: Hootbro
Originally Posted By: SirTanon
When I changed the plugs in my Fusion right around 215,000 miles, I put Autolite Double Platinums in it.. unfortunately, I went the wrong route. Not necessarily because they are bad plugs, but because they're not fine-wire electrodes. They'be been in the car now just over 10,000 miles, and while they work, I don't think they're working as efficiently as a comparable set of fine-wire plugs.
The plugs I pulled out of the car were the original factory FoMoCo fine-wire Iridium plugs, and my MPG and power have both dropped somewhat since the swap. It MAY just be that the coils (also factory originals) didn't react well to being separated from the plugs after all that time, and are now just giving out after being disturbed.
I've already ordered some NGKs, and when my new coils get here, I'll most likely be swapping the plugs out along with them. I may swap the coils first to see if things improve, and if my mileage and power go back to what they were before. If they do, the Autolites stay in, but I'm thinking that I'll probably end up just putting the NGK plugs in, in the end.
[censored], I've even considered putting the original, 215,000 mile plugs back in to see what happens.
Just wonder, was there some aversion or circumstance of not wanting to replace with Motorcraft OEM plugs? When I have always dealt with Fords, using OEM Motorcraft replacements was dollars and sense ahead with that brand.
Well, when I got the Autolites, it was more about my not really knowing that they would be an 'inferior' product in this engine when I bought them than anything else. Yes, price was also a factor. Motorcraft Sp530 plugs run about $6 each on RockAuto, and nearly $8 each most other places, including Amazon, AutoZone, O'Reilly... and the Autolite plugs that I bought were less than $2 after rebate. It was a no brainer, as far as I knew.. I know better now.
Fast forward to earlier this month, when I ordered replacement new plugs. I did a lot of digging and research. As far as I can tell, the Motorcraft are made my NGK, and the NGK plugs are actually spec'd in the Mazda cars which have this same engine (Which is, after all, a Mazda engine). Thus, I ordered the NGK plugs for my Fusion.
I HAVE found a set of 4 Motorcraft SP530 plugs on eBay for $15.99... so if for some reason, the NGKs don't work right in my Fusion, I'll order those.. So far, the NGKs seem to be working quite nicely.
... Also, for what it's worth - I compared the NGK plugs side-by-side with the FoMoCo plugs that I pulled out of the engine @ 215k, and they look virtually identical, minus the printing on the ceramic, and the obvious age on the old ones. Same length, same shape, ceramic fins, seat, etc..
Originally Posted By: SirTanon
When I changed the plugs in my Fusion right around 215,000 miles, I put Autolite Double Platinums in it.. unfortunately, I went the wrong route. Not necessarily because they are bad plugs, but because they're not fine-wire electrodes. They'be been in the car now just over 10,000 miles, and while they work, I don't think they're working as efficiently as a comparable set of fine-wire plugs.
The plugs I pulled out of the car were the original factory FoMoCo fine-wire Iridium plugs, and my MPG and power have both dropped somewhat since the swap. It MAY just be that the coils (also factory originals) didn't react well to being separated from the plugs after all that time, and are now just giving out after being disturbed.
I've already ordered some NGKs, and when my new coils get here, I'll most likely be swapping the plugs out along with them. I may swap the coils first to see if things improve, and if my mileage and power go back to what they were before. If they do, the Autolites stay in, but I'm thinking that I'll probably end up just putting the NGK plugs in, in the end.
[censored], I've even considered putting the original, 215,000 mile plugs back in to see what happens.
Just wonder, was there some aversion or circumstance of not wanting to replace with Motorcraft OEM plugs? When I have always dealt with Fords, using OEM Motorcraft replacements was dollars and sense ahead with that brand.
Well, when I got the Autolites, it was more about my not really knowing that they would be an 'inferior' product in this engine when I bought them than anything else. Yes, price was also a factor. Motorcraft Sp530 plugs run about $6 each on RockAuto, and nearly $8 each most other places, including Amazon, AutoZone, O'Reilly... and the Autolite plugs that I bought were less than $2 after rebate. It was a no brainer, as far as I knew.. I know better now.
Fast forward to earlier this month, when I ordered replacement new plugs. I did a lot of digging and research. As far as I can tell, the Motorcraft are made my NGK, and the NGK plugs are actually spec'd in the Mazda cars which have this same engine (Which is, after all, a Mazda engine). Thus, I ordered the NGK plugs for my Fusion.
I HAVE found a set of 4 Motorcraft SP530 plugs on eBay for $15.99... so if for some reason, the NGKs don't work right in my Fusion, I'll order those.. So far, the NGKs seem to be working quite nicely.
... Also, for what it's worth - I compared the NGK plugs side-by-side with the FoMoCo plugs that I pulled out of the engine @ 215k, and they look virtually identical, minus the printing on the ceramic, and the obvious age on the old ones. Same length, same shape, ceramic fins, seat, etc..
