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Mazda 2.3 spark plugs w/ 2 cycle oil 68k miles #4676458
02/24/18 01:22 PM
02/24/18 01:22 PM
Joined: Jun 2007
Posts: 1,428
FL
CharlieJ Offline OP
CharlieJ  Offline OP
Joined: Jun 2007
Posts: 1,428
FL
These are the OEM spark plugs from my 2007 Mazda 3 with 2.3l engine. The plugs have 68k miles with the last 45k miles using 2 cycle oil in the gas at approximately 1oz per 5 gallons, usually a little more. Look pretty good to me, gap was exact across all 4 at .050. I hope this debunks the internet myth that 2 cycle oil in a 4 cycle engine causes fouling or excessive carbon buildup. 2 cycle oil used is Pennzoil Marine XLF synthetic blend. Replaced with NGK IX 4344, LTR5IX-11, gapped to .040.



'07 Mazda3 2.3 Mobil 1 HM 5w-30
'84 Mazda Rx-7 Valvoline Maxlife 10w-30
Re: Mazda 2.3 spark plugs w/ 2 cycle oil 68k miles [Re: CharlieJ] #4676481
02/24/18 01:46 PM
02/24/18 01:46 PM
Joined: Jun 2012
Posts: 1,701
USA
oldhp Offline
oldhp  Offline
Joined: Jun 2012
Posts: 1,701
USA
They look good to me.......I might have run'em 30K longer.



Re: Mazda 2.3 spark plugs w/ 2 cycle oil 68k miles [Re: oldhp] #4676487
02/24/18 01:48 PM
02/24/18 01:48 PM
Joined: Feb 2009
Posts: 1,578
wv
krismoriah72 Offline
krismoriah72  Offline
Joined: Feb 2009
Posts: 1,578
wv
There was a guy on here that showed his piston tops on his 4 wheeler running the same formula as you and it looked like new.

If u could do a boroscope with the same results..i dont think anyone has done it yet in an auto...

Re: Mazda 2.3 spark plugs w/ 2 cycle oil 68k miles [Re: CharlieJ] #4676500
02/24/18 01:58 PM
02/24/18 01:58 PM
Joined: Oct 2010
Posts: 5,277
Florida
Artem Offline
Artem  Offline
Joined: Oct 2010
Posts: 5,277
Florida
And the benefit of the two stroke oil in the fuel is...?

I pre-mix the fuel for my Rotary RX-8 but the engine is designed to burn oil. A regular piston engine doesn't need it.


2014 Mazda 3 Hatch 2.0L & 6spd - Idemitsu 0w20 Synthetic @ $0.75 a quart. (thanks Advance Auto Parts for the awesome deal)
Re: Mazda 2.3 spark plugs w/ 2 cycle oil 68k miles [Re: CharlieJ] #4676501
02/24/18 02:00 PM
02/24/18 02:00 PM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
Originally Posted By: CharlieJ
using 2 cycle oil in the gas at approximately 1oz per 5 gallons... I hope this debunks the internet myth that 2 cycle oil in a 4 cycle engine causes fouling or excessive carbon buildup


That is such a low rate, you would NEVER EVER foul plugs at that rate

Originally Posted By: oldhp
They look good to me.......I might have run'em 30K longer.


Same here - clean the thread and put them back in again


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Mazda 2.3 spark plugs w/ 2 cycle oil 68k miles [Re: oldhp] #4676517
02/24/18 02:23 PM
02/24/18 02:23 PM
Joined: Oct 2014
Posts: 1,219
NoVA
Jimzz Offline
Jimzz  Offline
Joined: Oct 2014
Posts: 1,219
NoVA
Originally Posted By: oldhp
They look good to me.......I might have run'em 30K longer.



Yep re-gap, a little anti-seeze, and keep running; nothing wrong with those plugs.


yup
Re: Mazda 2.3 spark plugs w/ 2 cycle oil 68k miles [Re: CharlieJ] #4676901
02/24/18 08:47 PM
02/24/18 08:47 PM
Joined: Jun 2007
Posts: 1,428
FL
CharlieJ Offline OP
CharlieJ  Offline OP
Joined: Jun 2007
Posts: 1,428
FL
I know I could have run them longer, but I already bought new plugs; wasnít going to do the job and not replace them. Is running 2 cycle oil necessary? No, it isnít, but the engine does run smoother with it.
I first heard of the idea of doing this from this forum years ago and started premixing oil in the gas and these are the results. Many people have said it would create carbon build up and fouling of plugs even with this small dosage. Hereís my proof that it does not. Take it for what itís worth.


'07 Mazda3 2.3 Mobil 1 HM 5w-30
'84 Mazda Rx-7 Valvoline Maxlife 10w-30

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