Service life of spark plugs

[Mikelcy1963]

My car uses IFR6E11 iridium spark plugs. Manual says check every 40k and replace every 160k ! Is this wise ?

In my old car, I change every 10k (the std plugs)

[Ladykillerz]

My car uses IFR6E11 iridium spark plugs. Manual says check every 40k and replace every 160k ! Is this wise ?

In my old car, I change every 10k (the std plugs)

 

if you have spare $$$ to spend, iridium plugs will be good.

there is one brand mentioned that their iridium plugs can last for 120,000miles = 193,121.28km,

which another brand mentioned that their iridium plugs are recommend to change at 30,000miles = 48,280.32km and so on.

 

most importantly is to do a check every alternate car servicing.

if the tip is burnt out, change them.

 

other than that, my opinion is to change every 10,000-20,000km by using copper plugs. cheap and always new. hassle free too.

 

another point to note. always make sure you are using the correct size.

wrong sizing will cause shorter lifespan and etc. =p

[Yuan]

My car uses IFR6E11 iridium spark plugs. Manual says check every 40k and replace every 160k ! Is this wise ?

In my old car, I change every 10k (the std plugs)

 

Iridium last longer than copper.

 

Check every servicing.

[Fcw75]

Just use normal copper plugs and change every 20-30K.

 

Cheap and good.

[Tploh]

I thought Copper plug can last for 10-15K only ?

 

Anyway, I use iridium for its long life, not because I have $$$, but there are 3 plugs which are located at the back of the engine. to change the spark plug, my mech said he needs to dismantle a lot of parts before he can reach there. Hence the labour cost is high.

 

SO it is cheaper for me to use iridium.

[Good-Carbuyer]

I thought Copper plug can last for 10-15K only ?

 

Anyway, I use iridium for its long life, not because I have $$$, but there are 3 plugs which are located at the back of the engine. to change the spark plug, my mech said he needs to dismantle a lot of parts before he can reach there. Hence the labour cost is high.

 

SO it is cheaper for me to use iridium.

If engine in order, no sign of wear after 50,000km with copper electrode type (Kelisa engine). Not even need to re-set spark plug gap. Perhaps service life around 100,000km or more? Check if engine in order, if spark plug last 10-15k km only (usual for manufacturers to warrant shorter duration than actual service life). Copper electrode cheaper and can be better than iridium ones if you know how

Edited November 29, 2010 by Good-Carbuyer

[ER-3682]

Now petrol very clean burning,plugs won't get foul easily,except you modify the fuel system to make it very 'rich' burning.

[Mikelcy1963]

Thanks. I feel better now that even normal plugs last so long so Iridum plugs should not be an issue at 40k km coming up.

[Ilmw]

Thanks. I feel better now that even normal plugs last so long so Iridum plugs should not be an issue at 40k km coming up.

i realize whatever the manual says, change at 50% is good (for me).

 

manual says plugs change @ 100km, i change at 50km, can feel difference.

manual says MTF change @ 40km, i change at 20km, change gear smoother.

manual says engine oil change @ 10km, i change at 5km, oil come out is black black.

 

[Kungming]

Is it more worthwhile to replace every 10-20K using OEM plugs rather than going for those long lasting iridium ones? U can replace new plugs frequently that way.

[Mutant]

For me, normal plugs about 20-30k change, better ones change about 30-40k. For others oil & fluid, I change slightly earlier due to our short, start-stop driving. Earlier by about ~ 10% from normal typical S'pore cars servicing schedule.

[Tigershark1976]

gap ur own sparkplug and a normal copper sparkplug can last till the end of your COE... you may get it from ebay or try ur luck at sparepart shop.. i got 1 myself from ebay n it looks like this...

 

http://cgi.ebay.com/ebaymotors/Lisle-67870...=item2c54275323

[Tune2themax]

hi there

 

I changed mine at 100K, took out and they were still in good shape! I only changed cos going for cooler plugs. If not, will continue to use...For peace of mind, change at 100K...

[Pisces69]

My car uses IFR6E11 iridium spark plugs. Manual says check every 40k and replace every 160k ! Is this wise ?

In my old car, I change every 10k (the std plugs)

 

 

If yr car manufacturer uses IFR6E11 iridium plugs as standard then its fine. Just change at 160k km as recommended.

 

I dont check in-between as long as e engine is still smooth when accelerating or high speed cruising cos removing n replaceing e plug might lose e good seal cos e crushable washer is already deformed n might not give a good seal when reused a 2nd time.

 

Old cars wh copper plugs were designed to use them. Many new cars n now designed to use thise long-life plugs. As long as ty r recommended by e manufacturer, it sub b ok.

 

Just buy from reliable sources n check e country of manufacture that it is e same as e original plugs.

[Pisces69]

I thought Copper plug can last for 10-15K only ?

 

Anyway, I use iridium for its long life, not because I have $$$, but there are 3 plugs which are located at the back of the engine. to change the spark plug, my mech said he needs to dismantle a lot of parts before he can reach there. Hence the labour cost is high.

 

SO it is cheaper for me to use iridium.

 

 

It is exactly for this reason why some manufacturers use long-life plugs in their cars.

 

Just follow what is recommended by e manufacturer n stick to what ty recommend.

[Pisces69]

hi there

 

I changed mine at 100K, took out and they were still in good shape! I only changed cos going for cooler plugs. If not, will continue to use...For peace of mind, change at 100K...

 

 

Careful as cooler plugs can cause too much carbon build-up inside e engine.

 

Unless u do alot of high speed[near redline] driving n run a lean af mix.

[Yuan]

If yr car manufacturer uses IFR6E11 iridium plugs as standard then its fine. Just change at 160k km as recommended.

 

I dont check in-between as long as e engine is still smooth when accelerating or high speed cruising cos removing n replaceing e plug might lose e good seal cos e crushable washer is already deformed n might not give a good seal when reused a 2nd time.

 

Old cars wh copper plugs were designed to use them. Many new cars n now designed to use thise long-life plugs. As long as ty r recommended by e manufacturer, it sub b ok.

 

Just buy from reliable sources n check e country of manufacture that it is e same as e original plugs.

 

I have used some long life plugs and supposed to last another 100k. At close to 70k of its lifespan, my mechanic decided to give it a check and discovered (showed to me) that the plugs had to be changed.

[Ken4555]

I have used some long life plugs and supposed to last another 100k. At close to 70k of its lifespan, my mechanic decided to give it a check and discovered (showed to me) that the plugs had to be changed.

 

i personally think that the life of plugs are also connected to driving style...

 

the forever low rmp never lut VS the lut always etc...