Glow Plug For my Savage - Brazil

[martinho]

I was using the original HPI R4 (medium/cold) plug and I´m using the last one. I have to buy a new stock of glow plugs and can´t find the R4 here in Brazil. I can get these:
From cheap to more expensive:
Hobby King N3 (6 US$)
Hobby King N4
HSP 4
Odonnell #99 (8 US$)
Mccoy 8 (dificult to get)
Odonnell A8
Odonnell A5
Odonnell Purple (9 US$)
Odonnell Blue
OS #8
Traxxas 3232x (9 US$)
SH 3
SH 4
OS A5 (10 US$)
OS R5
Odonnel #97 (11 US$)
Duratrax Gold (23 US$)

Vendors recommend me the HK N3 (hot), OS #8 (medium), Odonnel purple (medium hot) and the traxxas 3232x plugs.

I´m confused. Mine was medium/cold and they recomend me from medium to hot. What should I choose?

Thanks

 

[Mickey]

What percentage of nitro fuel are you using?

 

[Upbasher]

Whatever you do don't get Traxxas plugs. They burn out like crazy fast and seem cheaply built. I have had really good luck with the Odonnel blue plugs.

 

[martinho]

I'm using 20% nitro and 12% oil