V6 RON plug

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Cavalier342
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V6 RON plug

Post by Cavalier342 »

The RON plug on my V6 has A on one side and B on the other :scratch It's the brown type.

Anyone know what they mean? It's currently on A. I assume it's similar to 93/95 that is on my other Cavaliers.
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China Blue 1989 Vauxhall Cavalier L 18SV
Kings Blue 1992 Vauxhall Cavalier LSi Auto C18NZ
Smoke Grey 1994 Vauxhall Cavalier V6 C25XE

Am I a light sleeper or a heavy sleeper? Well that depends on how much I've had to drink...
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Lowrider Dave
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Re: V6 RON plug

Post by Lowrider Dave »

A and B are instead of the actual Octane number printed on the side.
Brown 95/98 RON plug (i.e. A = 95, B = 98 setting).
The colour is primarily to identify the Ohms resistance - brown is 220 ohms.
Lowrider Dave.

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Cavalier342
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Re: V6 RON plug

Post by Cavalier342 »

Thanks Dave, so shall I switch it to B? Would it make any difference? As today's fuels are better.
Previous:
China Blue 1989 Vauxhall Cavalier L 18SV
Kings Blue 1992 Vauxhall Cavalier LSi Auto C18NZ
Smoke Grey 1994 Vauxhall Cavalier V6 C25XE

Am I a light sleeper or a heavy sleeper? Well that depends on how much I've had to drink...
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planetc
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Re: V6 RON plug

Post by planetc »

Cavalier342 wrote:Thanks Dave, so shall I switch it to B? Would it make any difference? As today's fuels are better.
Standard unleaded in 95 Andrei, you may well find it 'pinks' if you do.
"No the temperature gauge doesn't work........
we've driven 150 miles today........
the heater went cold last Thursday........
they check the level when it's serviced don't they?"
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Cavalier342
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Re: V6 RON plug

Post by Cavalier342 »

Ok cheers mate. I'll leave it be.
Previous:
China Blue 1989 Vauxhall Cavalier L 18SV
Kings Blue 1992 Vauxhall Cavalier LSi Auto C18NZ
Smoke Grey 1994 Vauxhall Cavalier V6 C25XE

Am I a light sleeper or a heavy sleeper? Well that depends on how much I've had to drink...
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humbucker
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Re: V6 RON plug

Post by humbucker »

So you'd be better off running B on super unleaded and A on regular 95 octane?
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Cavalier342
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Re: V6 RON plug

Post by Cavalier342 »

Would it make any difference if I did put premium in and swapped the plug? Apart from my wallet of course...
Previous:
China Blue 1989 Vauxhall Cavalier L 18SV
Kings Blue 1992 Vauxhall Cavalier LSi Auto C18NZ
Smoke Grey 1994 Vauxhall Cavalier V6 C25XE

Am I a light sleeper or a heavy sleeper? Well that depends on how much I've had to drink...
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James McGrath
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Re: V6 RON plug

Post by James McGrath »

Thread resurrection!

Just found this plug in my V6 and I was quite surprised to see it there.

Isn't the V6 supposed to automatically detect whether or not it can advance the timing with it's knock sensors?
therefore negating the need for a RON plug?
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Cavalier342
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Re: V6 RON plug

Post by Cavalier342 »

No, they are still fitted for some obvious reason. May as well add something while I'm here, I didn't notice any improvement in MPG or performance when I swapped the plug over and ran it on premium, so in all honesty just leave it be, they run fine on normal unleaded, as the fuels are better nowadays anyway.
Previous:
China Blue 1989 Vauxhall Cavalier L 18SV
Kings Blue 1992 Vauxhall Cavalier LSi Auto C18NZ
Smoke Grey 1994 Vauxhall Cavalier V6 C25XE

Am I a light sleeper or a heavy sleeper? Well that depends on how much I've had to drink...
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Re: V6 RON plug

Post by colin1 »

James McGrath wrote:...Isn't the V6 supposed to automatically detect whether or not it can advance the timing with it's knock sensors?

therefore negating the need for a RON plug?
I think you're right
if it's on your latest ride, it's not a RON plug any more, it's a regional code settings plug, used mainly for noise emissions I vaguely recall
93K C20XE Cavalier SRi Hatchback Spectral Blue Metallic
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Cavalier342
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Re: V6 RON plug

Post by Cavalier342 »

colin1 wrote: used mainly for noise emissions I vaguely recall
If that's the case then it didn't seem to make my old V6 any quieter, the noise that beast put out was unbelievable! :lol:
Previous:
China Blue 1989 Vauxhall Cavalier L 18SV
Kings Blue 1992 Vauxhall Cavalier LSi Auto C18NZ
Smoke Grey 1994 Vauxhall Cavalier V6 C25XE

Am I a light sleeper or a heavy sleeper? Well that depends on how much I've had to drink...
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James McGrath
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Re: V6 RON plug

Post by James McGrath »

colin1 wrote:it's not a RON plug any more, it's a regional code settings plug, used mainly for noise emissions I vaguely recall
Interesting. Any idea which side is which?
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ilovedmymantas
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Re: V6 RON plug

Post by ilovedmymantas »

Cavalier342 wrote:...... I didn't notice any improvement in MPG or performance when I swapped the plug over and ran it on premium, so in all honesty just leave it be, they run fine on normal unleaded, as the fuels are better nowadays anyway.
I always use v-power,( but not a slave to it). I've used 98 over about 6 years, previous sri & current cdx, 3 years on each. The cdx has only had super-unleaded.
I changed to 98 on the sri when I became aware of the horrors of 95 RON ( surely a classic car killer), with it's corrosive 5% ethanol added, ( 10% in some south England areas apparently).
https://www.whatcar.com/news/new-e10-fu ... motorists/
There was no noticeable difference until I had to fill-up with regular petrol on holiday - less power, lumpy drive, a bit of pinking. Back to normal after 98.
From what I understand higher octane petrol reduces pinking, has no ethanol added to (falsely, imo ) boost the octane rating, while at the same time reducing power. It seems ethanol will accelerate rot in just about everything on an old car over a short time.
The comments here are worth a look : http://www.motoring.com.au/98-ron-fuels ... oin-25725/
Now, I would never use anything less than pure(ish) petrol.
Why spend the money we do to keep loved cars running then scrimp on diluted petrol ? To me it's like fitting re-moulds or buying brakes from china-just not worth considering.
" It's not rust. It's age-related patina " ;)

1980 vauxhall cavalier MK1 1.6L, 1982 opel manta berlinetta 1.8s, 1985 opel manta 2.0 gte, 1990 cavalier 2.0 gl ,1994 cavalier sri x20xev

-1995 cdx x20xev

---------------
Matt
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