So LPG spark plugs. One of our readers asked if he should use the recommended special spark plugs for LPG & natural gas in his LPG-fired car. That would be better for everything, including engine life and fuel consumption.
In our experience it makes sense to take the spark plugs of an 1 step lower heat value when driving solidly on LPG and to set the electrode distance to the smallest indicated value. We, and people in our environment, have tons of experience with that.
Preconditions that spark plugs, air filters and exhaust systems give are often very flattering. Providers often have a semi-technical, warm emotional explanation. Even with such 'simple' screw-ins as spark plugs.
Of course everyone is free to buy spark plugs of 20-30 euros per piece. And it will not be bad if they come from renowned production and not imaginatively from Bokkiebokkieland, Verweggistan or Mexico.
But we like to be convinced that such spark plugs are worth their price.