How do these plugs look for ~8600 miles? - RX8Club.com



Series II Technical and Trouble shooting Discuss technical details for the Series II RX-8 and any issues or problems you are facing

Reply
 
 
 
Thread Tools Search this Thread Rate Thread
Old 07-17-2017, 02:37 PM   #1
Registered
Thread Starter
 
Join Date: Mar 2014
Location: Philadelphia, PA
Posts: 519
Thanked 13 Times in 11 Posts
How do these plugs look for ~8600 miles?

Pulled them the other week to inspect. They seem crustier than I'd have expected.

No pic of the rear trailing but it was similar to the front trailing.



Front Leading



Front Trailing



Rear Leading

Last edited by IamFodi; 07-17-2017 at 02:39 PM.
IamFodi is offline   Reply With Quote
Old 07-17-2017, 02:39 PM   #2
Registered
iTrader: (38)
 
9krpmrx8's Avatar
 
Join Date: Jan 2007
Location: San Antonio, Texas
Posts: 32,900
Thanked 66 Times in 56 Posts
Seems like a lot of wear for that mileage.
9krpmrx8 is online now   Reply With Quote
Old 07-17-2017, 02:39 PM   #3
Mod is as Mod does.
iTrader: (1)
 
StealthTL's Avatar
 
Join Date: Mar 2003
Location: WAAaaay North....
Posts: 7,052
Thanked 11 Times in 10 Posts
The crud is just from burning oil, but the color is great.
StealthTL is online now   Reply With Quote
The Following User Says Thank You to StealthTL For This Useful Post:
IamFodi (07-17-2017)
Old 07-17-2017, 02:51 PM   #4
Registered
Thread Starter
 
Join Date: Mar 2014
Location: Philadelphia, PA
Posts: 519
Thanked 13 Times in 11 Posts
Yeah, I boot it a lot once it's up to temp.

If the crud is from oil, that really makes me want to switch to a low-ash synthetic oil once the warranty is up.

I use nothing but Top Tier fuel, usually Shell or Exxon/Mobil. Any reason to think I should periodically use an add-in fuel system cleaner or something?
IamFodi is offline   Reply With Quote
Old 07-17-2017, 03:19 PM   #5
Registered
iTrader: (38)
 
9krpmrx8's Avatar
 
Join Date: Jan 2007
Location: San Antonio, Texas
Posts: 32,900
Thanked 66 Times in 56 Posts
I would use some Techron, I change my plugs every 10k and they are way cleaner than those. I run a SOHN and premix.
9krpmrx8 is online now   Reply With Quote
The Following User Says Thank You to 9krpmrx8 For This Useful Post:
IamFodi (07-17-2017)
Old 07-17-2017, 04:29 PM   #6
Registered
 
Join Date: Nov 2009
Location: Ohio
Posts: 723
Thanked 5 Times in 5 Posts
I use Techron every 1000-1500 miles right before I change my oil in my S2.
wannawankel is offline   Reply With Quote
Old 07-17-2017, 05:53 PM   #7
转子之魂
 
UnknownJinX's Avatar
 
Join Date: Apr 2017
Location: Victoria, BC
Posts: 168
Thanked 14 Times in 14 Posts
So concentrated Techron actually works in our cars?

I recall ChrisFix tried concentrated Techron and used borescope cameras to see if the concentrated Techron did anything. He found almost no difference after 2 bottles. Do REs see more benefits?
UnknownJinX is online now   Reply With Quote
Old 07-17-2017, 06:00 PM   #8
Registered
 
Join Date: Nov 2009
Location: Ohio
Posts: 723
Thanked 5 Times in 5 Posts
Techron for my injectors and manifold. Not to reduce carbon in the chamber.
wannawankel is offline   Reply With Quote
Old 07-18-2017, 08:53 AM   #9
Water Foul
 
Steve Dallas's Avatar
 
Join Date: May 2013
Location: Republic of Texas
Posts: 1,709
Thanked 47 Times in 32 Posts
Yeah, that's a lot of soot, but the color looks great.

I can't prove it does anything, besides blacken my tailpipes, but I run a large bottle of Techron through every 3K miles.

BTW, ChrisFix's testing methods are far from scientific, nor even adequate.
Steve Dallas is offline   Reply With Quote
Old 07-18-2017, 10:35 AM   #10
Registered
 
Join Date: Apr 2011
Posts: 490
Thanks: 0
Thanked 3 Times in 3 Posts
I ran my plugs until around 32k miles and they had very few deposits.

I had put on the BHR coils at 22k miles and wanted to see power improvement a step at a time.

My engine oil was and Is Mobil 1 0w40, and I was premixing fairly strong at least 8oz per 12 gals of Mobil 2T which I don't think they make anymore.

also, my car is 6 speed auto so only revs to 7k rpm.

Your plugs don't look like wear just those tan deposits.

I also doesn't look like you premix.

Some one mentioned the Ravenol 2 stroke oil which is rated FD, and I'll try that when I run out of my Mobil 2T.
40w8 is online now   Reply With Quote
Old 07-18-2017, 01:19 PM   #11
Water Foul
 
Steve Dallas's Avatar
 
Join Date: May 2013
Location: Republic of Texas
Posts: 1,709
Thanked 47 Times in 32 Posts
For comparison, I changed my plugs every June, when I was tracking my car heavily. This is how they looked in 2016, after 1 year of mixed use, including 18 track days.



Mobil 1 0W40 changed every 3,000 miles and Lucas Semi-Synthetic 2 Cycle oil premixed at 0.5 Oz per gallon on the street and 1.0 Oz per gallon on the track. Top Tier 93 octane always.

.

Last edited by Steve Dallas; 07-19-2017 at 09:02 PM.
Steve Dallas is offline   Reply With Quote
Old 07-19-2017, 09:41 AM   #12
Registered
 
Join Date: Dec 2016
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
I can assure you those plugs are fine the first time i changed mine at around 70k miles (bought my r3 at 66k) they looked just like everyones in this thread no idea how long it has been since they were last changed before i took owner ship however i did notice really low power down low in the rev range, however this could've been attributed to my cat going bad or a combo of both at the time.
so once i changed them i put around 10 miles on them and inspected them out of couriosity and surely they were ashy but are functioning perfectly.
How ever i did cross thread my trailing on the rear rotor housing no its sitting at 15-20 degrees downwards. Has this happened to anybody its such a bitch to get to since the firewall forces to to go in at a slight angle. Also tapping it didn't work is there a known fix for this or am gonna have to pull the motor?
Jdmx13b is offline   Reply With Quote
Old 07-19-2017, 08:01 PM   #13
Registered
 
Join Date: Apr 2011
Posts: 490
Thanks: 0
Thanked 3 Times in 3 Posts
IamFodi,

Didn't you say you're using Castrol GTX 5w20?

Also, what brands of gasoline do you use in your 8?
40w8 is online now   Reply With Quote
Old 07-19-2017, 08:40 PM   #14
Registered
Thread Starter
 
Join Date: Mar 2014
Location: Philadelphia, PA
Posts: 519
Thanked 13 Times in 11 Posts
Quote:
Originally Posted by 40w8 View Post
IamFodi,

Didn't you say you're using Castrol GTX 5w20?
Yup!


Quote:
Originally Posted by 40w8 View Post
Also, what brands of gasoline do you use in your 8?
Always Shell V-Power if I can. Main fallback is Exxon/Mobil. Other Top Tier brands if I must, though that's rare. Absolutely nothing else.
IamFodi is offline   Reply With Quote
Old 07-19-2017, 11:19 PM   #15
Registered
 
Join Date: Apr 2011
Posts: 490
Thanks: 0
Thanked 3 Times in 3 Posts
Those plugs look like good firing, and I'd just put em back in.

Shell and Exxon are Top tier, and I'm more in the Chevron Texaco with Techron.

My plugs had almost non of that tan deposit at 32k miles.

I think using a PIB type FD smokeless premix, the Mobil 2T I use helps burn up that leftover combustion to keep that crap off, but you going by the book might go just as far.
40w8 is online now   Reply With Quote
Old 07-20-2017, 07:02 AM   #16
Registered
Thread Starter
 
Join Date: Mar 2014
Location: Philadelphia, PA
Posts: 519
Thanked 13 Times in 11 Posts
I wish Chevron had any presence up here. I'd use them for sure.
IamFodi is offline   Reply With Quote
 
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 05:32 PM.


All content Copyright 2017 by Internet Brands, Inc.