Iridium is even harder than platinum, so these plugs were intended to last longer. They are also claimed to slightly increase combustion efficiency. The newest of the breed are ruthenium spark ...

Ordinary plugs need replacing every 30,000 miles, but platinum and iridium spark plugs could last up to 55,000 miles. If your vehicle has symptoms like hard starting and poor idling, it could mean ...

one reviewer pointed out that these copper plugs only last about half as long as their platinum or iridium counterparts. It’s highly recommended to replace spark plugs with the same brand the ...

PEM electrolyzer: a fast-growing technology The green hydrogen, obtained from water electrolysis fed by renewable sources, is ...