T

TallPaulB

Active Member

• Dec 7, 2018

• #1

Hi All,

I used an NGK part finder online and it recommended the BPR5EIX for the thor engine on LPG, but then a different part finder recommended the BPR6EIX.

What's the difference between those two? I ordered the 5s before I spotted the other part finder, will the work okay or should I return them and get the 6s?

(I'm sure someone will point out the fancy iridium plugs aren't worth it, but I'm happy paying the extra for them )

 

wammers

No longer with us, RIP

Donater

• Dec 7, 2018

• #2

Bit of a change from the days you bought a box of ten plugs for a fiver.

 

R

Ratae

Well-Known Member

• Dec 7, 2018

• #3

The number in the middle is the heat rating.
https://www.ngk.com/learning-center/article/200/how-do-i-find-a-colder-or-hotter-plug
Links in the link explain what it means.

 

T

TallPaulB

Active Member

• Dec 7, 2018

• #4

So the ones I've got are hotter than the recommended BPR6EIX, guess they're going back!

Cheers all.

 

R

Ratae

Well-Known Member

• Dec 7, 2018

• #5

Looking at their site NGK also do a plug specifically for LPG/CNG.
"LPG LaserLine spark plugs are dual precious metal spark plugs specifically developed for gas-fuelled engines. The combustion of gas is different from the combustion of petrol and, therefore, requires spark plugs which are specially adapted to these conditions. The gas-air mixtures are more difficult to ignite, as more ignition voltage is required and the risk of failure of the ignition coils increases. NGK LaserLine spark plugs come with a lifetime of 60,000 km, clearly outperforming “normal” spark plugs"
https://www.ngkntk.com/uk/products/spark-plugs/
Bit more here; https://www.ngkpartfinder.co.uk/files/LPG_info.pdf

FWIW I've run my dualfuel 3.5EFi RRC mainly on gas for around 20 years on the BPR6E plugs recommended for petrol & not had any issues.
The other plugs listed for mine are the BPR6EIX and LPG2. The latter on ebay at silly money.

 

Last edited: Dec 7, 2018