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Old 09-25-2011, 06:58 AM   #101 (permalink)
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Looks like you only need to throw one of 'em out.

Maybe someday I'll take a pic of some plugs I've pulled out after they've been in 50,000 miles and we'll see how bad they are... wish I would've taken a pic of the OEM air filter I finally changed at 80,000 miles out of pure guilt (now thinking I should have left it in).

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Old 09-25-2011, 07:09 AM   #102 (permalink)
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Quote:
Originally Posted by Frank Lee View Post
Looks like you only need to throw one of 'em out.

Maybe someday I'll take a pic of some plugs I've pulled out after they've been in 50,000 miles and we'll see how bad they are... wish I would've taken a pic of the OEM air filter I finally changed at 80,000 miles out of pure guilt (now thinking I should have left it in).
Here is what a brand new one looks like, center diode is the same height as outer area. The plugs I pulled were 2-3mm shorter and when the spark gets farther away from the rotor it makes a big difference in combustion in a Wankel motor. They do have Iridium and platinum which lasts slightly longer, up to 10,000 miles under normal driving but I usually redline to 9000rpm 5 times a day 1-3rd gears before. Maybe it;s time for me to push the MPG of one of my rx7's and see how long i can get out of a set of plugs just for your sake Frank! lol


Oh and yes, the trailing plugs tend to wear out before the leading plugs because they get hotter of course.

BTW I would probably look at you the same way as when you first looked at me when I said I change them every 3000 miles! lol I bet you even looked at your plugs after 50k miles and said hot damm! lol
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Old 09-25-2011, 12:57 PM   #103 (permalink)
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75 Buick V-6, 60,000 miles on 1 oil change= timing chain worn to point it jumped engine dead.
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I'll keep changing my oil thank you!
 
Old 10-20-2011, 10:24 AM   #104 (permalink)
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I drove now for 35000 km (21700 miles) with the same oil no problems at all. The weather has started freezing during the nights. The oil remains as good as always. Same air filter same fuel filter. Absolutelly so far no need to change the oil.
 
Old 10-21-2011, 01:27 PM   #105 (permalink)
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Quote:
Originally Posted by HighMPG View Post
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Here is what a brand new one looks like, center diode is the same height as outer area. ...
I'm sure you meant "electrode". Oh, I would have trashed those plugs too, I had no idea that much wear can happen for you in so few miles. I easily run 20k-30k miles on a set of standard copper plugs before they wear out.
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Old 10-21-2011, 03:28 PM   #106 (permalink)
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Old 10-22-2011, 04:30 PM   #107 (permalink)
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Is this thread for oil or other minor things?
 
Old 10-23-2011, 01:09 PM   #108 (permalink)
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I think it started out for oil.

Personally, I think not changing your oil is stupid, even more so now with modern engine technology. Heat breaks down oil, and turbochargers and lean burn engines produce a lot of heat. I would not run any oil past 10,000 miles (regardless of manufacturer claims) without having an oil analysis done to ensure that everything was still okay.
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Old 10-23-2011, 05:58 PM   #109 (permalink)
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Ladogaboy,
The oil in my car is double milegage to what you believe is ok, and the car is working perfectly!
 
Old 10-23-2011, 06:17 PM   #110 (permalink)
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I once owned a truck that did not require oil changes. It had a normal 4 cylinder gasoline engine, and a manual tranny.

There was a crack in the engine block, and the oil in the crankcase would blow out onto the road (and sometimes the exhaust manifold, if I pushed the engine). I'd have to buy a quart of oil at every fill-up. However, it never needed an oil change.


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