Which Brand Of Spark Plug To Use?

[edju1958]

While searching for plugs & doing cross references I've found that the three most popular brands of spark plugs are Champion,NGK,& Bosch,not necessarily in that order.There are other brands out there that I know nothing about - Denso & Torch are two that come to mind that I've never even heard of till the last 1 1/2 yrs.Does anyone know anything about these last two plug mfgrs.?Are they a good plug to use,or are they not so good (prone to fouling out,etc.) Then there are the old stand bys - Prestolite (if you can find them),Rotary & Oregon.I suspect that the latter three are made by a mfgr.for those three companies,correct me if I'm wrong.If anyone can shed any light on this subject it is greatly appreciated!

                                                                                                  Ed

[sweepleader]

I have had some experience with Denso, they seem to be fine. Torch seems to me to have been cooked up by a marketing dweeb on his way out the door, trying save his job. That worries me from a user point of view, I do not have any experience with them so bear that in mind with regard to my comment.

Having changes sparkplugs professionally in cars for some time, I have come to respect NGK and AC. I am not certain that relates directly to 2 cycles, I have never used an AC plug in a saw. I really like the fine tip, platinum or iridium plugs but it seems that Autolite has discontinued them and I have not found another source to fit small engines. I would normally not use an Autolite plug but I think that is because I grew up with GM products.

[edju1958]

Nov 24, 2018 11:20:00 GMT -5 sweepleader said:

I have had some experience with Denso, they seem to be fine. Torch seems to me to have been cooked up by a marketing dweeb on his way out the door, trying save his job. That worries me from a user point of view, I do not have any experience with them so bear that in mind with regard to my comment.

Having changes sparkplugs professionally in cars for some time, I have come to respect NGK and AC. I am not certain that relates directly to 2 cycles, I have never used an AC plug in a saw. I really like the fine tip, platinum or iridium plugs but it seems that Autolite has discontinued them and I have not found another source to fit small engines. I would normally not use an Autolite plug but I think that is because I grew up with GM products.

I personally don't care for Autolite plugs either.I know some people swear by them,but I've never had much good success with them.I liked AC plugs & had good success with them as well,but they're difficult to find nowadays.There was one mfgr.of chainsaws (McCulloch) that used AC plugs in their equipment extensively (maybe exclusively would be a better word to use).It's good to know to stay away from Torch brand plugs till I should hear anything more positive about them.

                                                                                          Ed

[rowdy235]

I am a big fan of NGK plugs. When I was growing up my grandpa (who had rode motorcyles in the days of 30w motor oil mixed with the fuel) always ran them and I took after him. Generally I run NGK in everything.

I will say I have seen a total of two plugs DOA in my life and they both were champions.