Anyone know the platinum content of spark plugs?

[VADER]

Just wondering with platinum being so expensive, how much do these contain? .0001 gram? I think Bosch & NGK make them and they are not expensive. Thanks.

 

[whitehot1]

Just wondering with platinum being so expensive, how much do these contain? .0001 gram? I think Bosch & NGK make them and they are not expensive. Thanks.

I can't answer your question but here is some info for you and a link where you may find the answer with some searching.

PLATINUM'S USE IN SPARK PLUG CONSTRUCTION
Nearly all spark plug manufacturers use platinum in one form or another on their long life or performance spark plugs. This is because of platinum’s high melting point, which makes it useful in two ways. On long life spark plugs a thin wafer of platinum is bonded at the firing point to the center electrode (and possibly ground electrode) solely so they don’t wear as fast as a traditional plug. On a fine wire performance plug, the very tip of the center electrode is made of platinum so that the fine wire tip will last longer. Do not be fooled, all platinum plugs are not created equal. Platinum is a very expensive precious metal, a $2 platinum spark plug will not have much platinum in it, and therefore will not last as long as a $12 platinum spark plug. Some platinum plugs have only the center electrode tipped with platinum, while others have both the center and ground electrodes platinum tipped. (It is not suggested that platinum plugs be used on vehicles with nitrous injection, however, there have been no problems reported using iridium plugs with nitrous).

Spark plug, Spark plug wire, spark plug gap, spark plug cross reference and ignition wires at Sparkplugs.com

 

[alwayscode390]

Interesting ^^^ ---

 

[VADER]

Judging by the plug prices, the platinum content is minimal and an alloy too per that website. On 02 sensors also.

 

[GNTIM]

I havn't had good luck with platnium plugs in these cars.