what are the best spark plugs for average use of a Heavy Duty 2500?

 

I like my champion plugs.....alot of ppl will say bosch is garbage...My truck had them in it when I bought it and I never had any problems, but when I changed them the electrode was pretty ate up and the ceramic was chipping offon some andone had a crack all the way through it.

 

I think that the stock champions are the best for our trucks. I tried NGK's cause thats what I have always ran in everything but they didnt run to great in 360, I also tried the Autolites that are supposed to be good, but they were garbage. I havent tried the Bosh and I dont plan to. Stock Champions are the best route to go in my opinion,

 

I've always been told that Champions are the best for Dodge and I have many relatives who have been long long time Dodge owners.

 

sorta disapointing turn out for spark plugs poll lol

 

NGK's....

 

NGK...am I alone?

 

I run NGK's, no complaints. Getting 19 mpg CDN on the last couple of tanks, so around 17 mpg U.S.

 

I like the NGK V-Powers but can't say they are better in new condition than the stock Champions, but may keep sharp edges longer.

In terms of sparkplugs
the Magnum engines seem to do well with many
as long as the edges are kept sharp.

Cylinders 7 and 8 may need sparkplugs one heat range cooler
than cylinders 1-6

Much sparkplug tech info in the Magnum Engines Sparkplug FAQ in post 15 at:

https://dodgeforum.com/m_366844/mpage_1/key_/tm.htm

 

Suprised no one has mentioned plug indexing.