So this is why I was getting 9 mpg
12-10-2009, 11:09 AM
#27
partyboy007
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oh crap i was thinking (i changed them at 50k) so like 5k ago lol and went ahead and screwed it
so yeah i only have like 5k on the new Denso not tenso jeez this effing cold is messing with me
thanks mscamp02
so yeah i only have like 5k on the new Denso not tenso jeez this effing cold is messing with me
thanks mscamp02
12-10-2009, 12:09 PM
#32
2005 Black RX-8 GT 6M
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When I had the mechanic replace my plugs at the last servicing, I should have taken a picture of them/had him keep them.
Glad to see your dealer replaced them. They need replacing every 30K at least along with ignition coils.
Glad to see your dealer replaced them. They need replacing every 30K at least along with ignition coils.
12-10-2009, 01:13 PM
#34
ThEy MaDe Me Do It
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Hell, your lucky. When I changed mine at around 80k, they didn't even have the prongs which means they were probably never changed, and for some reason I still have them 
.
.
12-10-2009, 07:31 PM
#35
2005 Black RX-8 GT 6M
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12-10-2009, 07:37 PM
#36
ThEy MaDe Me Do It
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Nope, not the first owner. Soon as I got it I changed everything, and checked for all recalls etc...., who ever had it must not of done too much with it, that or they didn't think the plugs needed changed like they do.
12-10-2009, 07:43 PM
#38
2005 Black RX-8 GT 6M
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You have to wonder how much, if any, regular servicing they did then. How many miles on it when you bought ur 8?
12-11-2009, 06:53 AM
#42
ThEy MaDe Me Do It
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It had around 76k, and now over 95k. Very clean car, except the battery was bad when I bought it. After my big tune up I get around 22-25mpg now. Records from mazda showed they were there quite a bit.
12-11-2009, 10:59 AM
#44
Power!!
Our plugs are touted as being able to last 100K miles like most modern cars these days so I can see an average owner and average uninformed dealer thinking the plugs should be fine.
The sad truth is the amount of buildup we get on the plugs kills them quickly. You can't really effectively clean them with an abrasive but I wonder if there is an effective plug cleaning chemical that won't remove the iridium coating? I know there was a thread where a guy was trying it out, I think with the BG-44 stuff but didn't have much success.
I'm thinking if we could clean the buildup off the plugs without damaging the coating they would be re-usable and at $80 per set that would be nice to be able to do.
The sad truth is the amount of buildup we get on the plugs kills them quickly. You can't really effectively clean them with an abrasive but I wonder if there is an effective plug cleaning chemical that won't remove the iridium coating? I know there was a thread where a guy was trying it out, I think with the BG-44 stuff but didn't have much success.
I'm thinking if we could clean the buildup off the plugs without damaging the coating they would be re-usable and at $80 per set that would be nice to be able to do.
12-11-2009, 02:03 PM
#45
ThEy MaDe Me Do It
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This is very true, especailly since people say oh 100k and never have to replace them until then. What about a low acidic liquid to soak them for a short time, then use an air gun to blast them?
12-11-2009, 02:12 PM
#46
I think if you do a proper seafoam treatment once or twice a year (in the auxiliary intake ports, not via the gas) that should have a strong cleaning effect on the plugs. It's fairly well demonstrated that it cleans out carbon deposits on the port openings and other places, so I'd imagine it's good for plugs too. I do it every spring.
I don't know much about spark plugs though: is there anything else about them that "wears out"? Or do they just get dirt / carbon / corrosion buildup and that's it?
I don't know much about spark plugs though: is there anything else about them that "wears out"? Or do they just get dirt / carbon / corrosion buildup and that's it?
12-11-2009, 02:14 PM
#47
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