spark plugs need to be changed at 60k?
07-16-10, 04:14 PM
#17
Direct injection/stratified fuel charge is presumably harder on plugs than a more traditional configuration is the generally accepted reason for the 60k plug change interval.
Over a 200k mile period, longer than 99% of owners will probably have their 2IS, you're only talking one extra plug change compared to 100k mile plugs so I'm not really concerned enough about it to experiment with my engine and longer intervals.
Over a 200k mile period, longer than 99% of owners will probably have their 2IS, you're only talking one extra plug change compared to 100k mile plugs so I'm not really concerned enough about it to experiment with my engine and longer intervals.
07-16-10, 04:42 PM
#18
I sort of understand the theory behind this, but consider this plug with 60k (stolen pic from the DIY)
and the new one
The gap and shape of the tip / electrode seems good. Other than running a bit cold, I don't see what's the reason behind a 60k rather than a 90k or 120k change interval. Of course, if they don't want to do engineering analysis or just don't want to take a chance, that make sense, because they won't be paying for it anyways.
and the new one
The gap and shape of the tip / electrode seems good. Other than running a bit cold, I don't see what's the reason behind a 60k rather than a 90k or 120k change interval. Of course, if they don't want to do engineering analysis or just don't want to take a chance, that make sense, because they won't be paying for it anyways.
07-26-10, 08:24 AM
#19
Thanks. I will looking for the preventive maintenance change at 60k miles or so. Peace of mind knowing the engine is firing good. Still may not be until January for me.
07-26-10, 08:56 AM
#20
Risk: Shelling out $10,000+ for a new engine because you didn't follow the manufacturer's recomended maintenance schedule.
Reward: Delaying (not avoiding) the ~$100 expense for new spark plugs.
I'm all for saving a buck, but that's not a very good bet to make.
Javier
07-27-10, 01:30 PM
#21
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Guys...I'm sort of a newbie when it comes to the mechanics of cars, and my IS250 is approaching the 60K mile mark. Will I see a noticeable difference in performance by replacing the plugs?
Also, if I purchased via sewell on my own, could I still take to a dealer and have them install my plugs, or will they give me the run around, talking about how they can't "guarantee" the work because it's not coming from them? Thanks.
Also, if I purchased via sewell on my own, could I still take to a dealer and have them install my plugs, or will they give me the run around, talking about how they can't "guarantee" the work because it's not coming from them? Thanks.
My dealer told me they would install them as long as they are OEM, however, they still wanted close to $400 to do it. I told them HECK no..i am going to take care of it on my own..
07-27-10, 03:58 PM
#22
+1. Let's do a risk/reward analysis here:
Risk: Shelling out $10,000+ for a new engine because you didn't follow the manufacturer's recomended maintenance schedule.
Reward: Delaying (not avoiding) the ~$100 expense for new spark plugs.
I'm all for saving a buck, but that's not a very good bet to make.
Javier
Risk: Shelling out $10,000+ for a new engine because you didn't follow the manufacturer's recomended maintenance schedule.
Reward: Delaying (not avoiding) the ~$100 expense for new spark plugs.
I'm all for saving a buck, but that's not a very good bet to make.
Javier
The correct risk reward analysis is:
Risk: reduced fuel economy, engine oil getting dirtier.
Reward: extending the life of spark plug from 60k to 90k, reduce the spark plug and part cost per 30k driven from $50 to $33, and labor cost of whatever your mechanic is charging you, probably 1/2 to 1 hour due to the removal of the cosmetic engine cover.
Most importantly, this is about not wasting natural resources and increasing trash that goes into the land fill.
Last edited by PandaBear; 07-28-10 at 11:58 AM.
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