ngk spark plug life

[russian rocket]

how long should my NGK B7EV platinum/paladium plugs last?

they have dome 10000 miles now but are quite old 9y or so.

IIRC they should be good for 60000 is this right?

[stevieturbo]

9 years old ?

I dont think I'd run a plug any more than a couple of years, regardless of milage.

[That Daddy]

stevieturbo said:

9 years old ?

I dont think I'd run a plug any more than a couple of years, regardless of milage.

Good advice its not like there expensive plugs,they have done there job now bin em,hope you dont reliy on your motor oil this long

[russian rocket]

I have had them out and they look in excellant condition, I have hust re-gapped them. Presuaably if there good for 60000 miles they should be ok for at least 6y.

So tell me whats wrong with 9y old oil

[MTv Dave]

9yr old oil will have aged well and just about be starting to work properly

[Transmitter Man]

MTv's correct.

NGK - way to go.

Last forever.

Phil
79 de Tomaso Longchamp GTS

[AntMat]

Even if they are not due for change, remove plugs at least once a year and replace with a drop of anti-seize fluid on the thread! Plugs seized in the head can be VERY expensive, glow plugs far more so.

[falcemob]

russian rocket said:

So tell me whats wrong with 9y old oil

Nothing, it's been in the ground for millions of year so a few more shouldn't make much difference.

[AntMat]

I am surprised that the resident PH oil expert or his assistant has not replied.

Indeed oil "ages"; far more prematurely in engines that have a hard life, i.e. low mileage/pottering about units. Considerably more condensation will form in these than in a well (ab)used one! This becomes a "goo" which can block crankase breather systems and cause scoring of the bores, partial blockages (or worse) in oil passageways, valve gear problems etc.. The blocking of a crankcase breather system can also have a detrimental effect on the proper function of the EGR valve which can, in turn, cause even further problems.

The nature of these is determined by whether the the engine is diesel or petrol/lpg/bio ethanol and has normal or forced induction. This why oil should be changed far more frequently timewise in a low mileage engine.

It is always better to run low mileage engines on a 100% synthetic like Shell Helix Ultra or, if you're feeling a bit richer and really cherish your engine, AMSOIL 100% Synthetic European Car Formula or its equivalent.