Thread: SPARK PLUGS

I’m sure if you search the LPG section, you’ll find posts by the late Bee Utey who was our LPG expert.

Originally Posted by gasman

Hi all.
What r the best plugs to use on a 1991 injected 3.5 using LPG
Thank you all who comment

G`day ,

we have had an 85 Range rover on LPG for almost 30yrs .

Initally a 3.5 but the last 20 odd a 4.0 .

I have found NGK to be the most suitable brand as i did with 2 stroke motorcycles for many years .

I have always used the std heat range or one hotter .

I have always gone off the plug colour for heat range .

Most will say to go a range colder but not what i have found and this has always been the tow car when required .


Forgot to mention it is twin carb not EFI but we had a 3.9 EFI LSE for around 10 yrs before it hit a bank on the side of a wet road and its plugs were also std or one hotter .