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Bad experiences w/ Bosch Platinum spark plugs surface on these forums from time to time. Let's get an official count going so we can put this debate to bed! If you have a result that doesn't fit one of the above categories, post your explanation here.
 

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Bosch +4 = Stinksville
 

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Haven't tried them, but I think that should be kept in mind; Motorcraft stock dual platinums will do the exact same thing, cheaper, and they're actually designed for our engines. That's why I haven't used the Bosch; I've never had a complaint with the OEM's.
 

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I agree. Motorcraft plugs all the way.
 
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good poll, I'm curious to see what the outcome is. Ofcourse I voted null so I can see the results
 

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QUOTE
Bosch +4 = Stinksville[/b]
Couldnt have said it better myself
They did nothing but make my car idle rough, Autolite Double Plats all the way!
 

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I've used Bosch Platinum 4's in my 1993 Mitsubishi Diamante with Bosh wires. I owned the car since 1999 and never had a problem with them. I also installed Platinum 4's when I bought my 98 Taurus back in November of '02 and I've put 14,000 miles on them and they're still fine. I'm completely satisfied
 

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I actually drove a Contour for 8 years (95) so I'm pretty familiar with the Duratec engine. If they use the same waste fire ignition as the 2.5, I believe the consensus over at Contour.org was that Motorcraft was the only way to go. I believe Bosch plugs were fine in other applications.

I had also put in Bosch platniums before I read those threads on the spark plugs and they lasted about 20k before I had to replace them with the Motorcraft ones. Other people haven't been as lucky and got less or had serious problems right away. I think the autolite plugs were also good.
 

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I have the Platinum +4's and I've had mine on for 49k miles. So far they haven't given me any problems.
 

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They worked horribly in my Saturn. They burn too cold for some engines. They also have been not so good in the BMW's here at work.

So, for some engines they don't work well; mostly GM and BMW are the ones I'd heard the most complaints about. I am just going to stick with what it calls for.

Tina
 

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I had them in a reliant once and the damned things would not fire when the weather was cold, as was the engine.
Indiana winter, sub zero, car would not start for anything one night, I had to go to the store (walking, G.D. it) and buy some different ones.
I guess cold burning plugs just do not do well with 4 cylinders, on count of 4 bangers run hotter.

Bosch plugs - don't waste your money.
 

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Bosch Platinum 2's are in my engine now... I've had them for 45000 km.. they improved fuel economy and have never caused the slightest problem. I like!
 

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I think the consensus is that the bosch plugs work well for some and not so well for others. Instead of taking the risk (like i did), your better off just getting motorcraft/autolite. I have not heard anyone complain about the autolite single or double plats in their engines. I have those, and the car runs like a dream.

Just my $0.02
 

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I've never had any luck with them, in any car!!
 

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Originally posted by Parksie@Mar 5 2004, 08:38 AM
Bosch Platinum 2's are in my engine now... I've had them for 45000 km.. they improved fuel economy and have never caused the slightest problem. I like!
Same here, only about 22,000 miles. Maybe the +4's are the source of the problem.

Of course, the Vulcan could run on 2 cylinders, or if the plugs were replaced with lightbulbs, such is the powah of Vulcan.
 

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Anyone know what material the Motorcraft plugs are made out of?
 

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Originally posted by 93taurusSX@Mar 8 2004, 12:12 AM
Anyone know what material the Motorcraft plugs are made out of?
Pretty sure they are platinums.
 

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I used them in my '95 3.8L and didn't see any benefit to them. They didn't fail, but when pulled one for an inspection, it looked like hell. It was totally covered in soot and didn't have that many miles on them. I was also told by a service manager that you shouldn't use platinum plugs in Gen 4's. Don't believe everthing you hear because the factory puts platinum plugs in the cars.
 
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