Upgrade spark plugs

[versatile75]

I want to upgrade the plugs on my MK4 Astra to the new type
Bosch super 4, has anyone used these and if so and are they as good
as they are rated

 

[Belle427]

i used them many years ago and didnt notice any gain in performance or better starting. Personally i would just stick with the reccomended plugs for your engine but if your keen to give them a go it wont hurt anything.

 

[alan333]

In my opinion putting "super" plugs etc in a standard car will make no noticable difference. Perhaps a highly tuned Ferrari would notice the difference, but not an Astra.

 

[stevenbmkiv]

I always buy NGK plugs and find them better.
Keep the same grade and don't change for a colder grade unless your running a highly modified car which generates a lot of heat.