Some say that Autolite double platinums are better than AC/Delco double platinums.

What do you guys say?

 

Chaz,

I can't speak from experience, since I don't intentionally use anything from Fram/Autolire/Allied Signal (same company). Their quality has been very suspect since they were acquired by Allied Signal. Maybe they are all better now, but I'm not going to be the guinea pig. I've had good success with AC/Delco, and Champion for spark plugs, so I'm not switching.

 

I sat here and waited for Vader to respond because I figured he'd rip Autolite apart but he didnt

I think Autolites suck. For quite a while they had problems with the platinum pads coming off the electrode at around 40k miles. Not good for a plug thats supposed to last 100k. Also, they still havent figured out how to put a plating on a plug that doesnt deteriorate and turn to rust in a really short period of time (like a month). AC Delco figured that out quite some time ago.

Also of note, Splitfire plugs are made by Autolite. Autolites are also still the factory plugs Ford uses, even with the major problems Ford has had outsourcing Allied-Signal for parts over the past 15 years.

 

i co-op with autolite (now owned by honeywell) in the engineering department. i've only been there three months so i don't know a whole lot yet and i mainly run tests, not into the engineering yet. what i've learned thus far: champions aren't too good. one of the tests i did was to run high voltage through the plug and measure the resistance of the resistor in the plug, the champions are really insonsistent. sorry i can't remember specifics since i've been on my school rotation the last three months.

as far as platinum detachment, we run an engine for three hundred straight hours, cycling from 30 seconds of idle to 30 seconds of 4000rpm. the plug must hold its platinum for at least 200 hours, IIRC which is the equivalent of like 100k miles

i'm going back to my work rotation in a month, i'll try and gather some more information and post it.

 

It may be called Honeywell now, but they didn't by Allied. Allied bought Honeywell. Due to several recent incidents resulting in bad PR for Allied they decided to change the company name to Honeywell (when the bought the company they bought the name) to improve their PR by making us consumers think a great company like Honeywell would make the Allied plants straighten up and fly right. Amazing what some management types and their consultants will do to make it look like they fixed a problem when they didn't do a d--- thing.

 

I guess I wasn't paying much attention, but if you drove 100 MPH constantly (about 4,000 RPM) for 200 hours, that would only be 20,000 miles. Driving slower would be even fewer miles. I guess the math at Allied is somewhow different....

The "old" standard for major service intervals is still 2,000 hours. Maybe you forgot one of the zeroes?

 

Here's my take on the platinum autolites. They suck!! Ive got a Plymouth Lazer 2.0 at work right now that had an autolite plug fall apart on the no.3 cylinder, drop debre down, score the cylinder wall (badly) and there was just enough material to hang up one of the valves long enough to push the rocker off the cam.
The bad thing is the same thing happened last year but with more destructive results. As for regular Autolites I use them with no problems and will continue to do so.