Next year, another more exotic metal or metal compound may be found that surpasses Ruthenium. "The more exotic refractory metal tips simply give you more tip life and less gap growth because they erode less during the 'plasma' phase of the spark.Īs of right now, Ruthenium seems to have the lowest erosion rate of all of the refractory metal center electrode tips.
A spark plug also won't get anywhere near being that hot, so the slight difference won't mean much between the 2. MolaKule posted in another thread that ruthenium is more resistant to erosion. But if you have a difficult to change vehicle i'd use iridium, I don't get the advantage of ruthenium other than its a higher profit margin for the company. If the plugs are easy to get to and you don't mind changing them, sure use non- precious plugs every 30k. I'm sure the profit margin is much better if they can sell the ruthenium plugs at the iridium prices. Iridium is $1400 and oz and ruthenium is $250 and oz. Why use ruthenium, if iridium has a higher melting point? They are close, but the melting point of iridium( 4435F) is higher than ruthenium (4233f). If it's a less expensive metal and it can withstand more heat, why not use them? Laser Platium.PZFR5F-11.$40.31.80-100 interval.Platinum center, platinum ground FR5AHX.$35.63.80-100+?interval.Ruthenium center, platinum ground Iridium IX.ZFR5FIX-11.$28.67.40-50K interval.Iridium center, nickel ground G power.ZFR5FGP.$12.87.40K? interval.Platinum center, nickel ground ZFR5F-11.$10.79.OEM 30K interval.Nickel center, nickel ground Cost difference is negligible IF I run the non OEM plugs 2x - 3x the OEM recommendation of 30K.Ĭomparison: cost per 4 delivered (Rock Auto) Molakule's recent thread describes that fine wire plugs have better spark, maybe better combustion = better performance?: https:/ / forums/ ubbthreads.php/ topics/ 5322738/ spark-plug-tips#Post5322738 Which is it? OEM for this simple engine for best performance or something else? Plug change difficulty is NOT a concern. This following 2014 thread with similar question has a high consensus of "only use OEM" for numerous reasons (i.e., best design/match for that engine/ no performance gains, only longevity with precious metal): https:/ / forums/ ubbthreads.php/ topics/ 3354337/ 1 I'm itching to try the new Ruthenium plugs. It came with OEM NGK conventional v groove nickel electrode plugs with 30,000 mile change interval (aka "copper" plugs). non turbo 2.4L GEMA engine is due for its 3rd plug change next month at 90K miles. Guess what.the original OE AC DELCOS were BOSCH's.My car with 4 cyl. Both of us had to change plugs before 50k miles due to misfires. I just have good luck with the Autolites and they were actually better than the OE Delcos in both my and my dad's 2008 CTS's with the DI 3.6. I have to admit that you are absolutely right and I know this and agree. This likely wasn't a problem in the leaded-gas days when the debate was whether to change plugs twice a year or every 10K miles. Anti-seize compound can act as a lubricant altering torque values up to 20 percent, increasing the risk of spark plug thread breakage. By way of contrast, I've run into seized-in factory plugs (admittedly not NGK) on friends' vehicles. NGK tech support has received a number of tech calls from installers who have over-tightened spark plugs because of the use of anti-seize. At $3 for iridiums AcDelcos I'm tempted to buy a set although I don't need really need plugs. I always use NGK plugs, and always add a wee bit of anti-seize. $2 off iridium and you can get them for as low as $5. There's a mail-in rebate on ACDelco plugs. I always like to use OE parts when the price is reasonable. Both fit and work but only the first one is OE. It's not too different from choosing an ACDelco classic oil filter vs a FRAM.
GM could've used Autolites or some other at probably lower cost but chose the NGK design. You know it not just fits exactly right but is also the exact same heat range and durability has been verified. But the way I look at it is I'd rather have the OE plug (or in this case, also the NGK) for my own vehicle or where possible. I don't think there's anything wrong with Autolite or Champion plugs.
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