I'm not even sure these are the same. From what I'm reading Lucas is an upper cylinder lubricant while Techron is a fuel injector cleaner.

Basically this is a car with roughly 120,000 miles on it and I'm willing to try one of these. Which should I use? Or maybe both if they're not the same?

I don't think the fuel injectors have ever been cleaned so I think the Techron is a good choice and I was a minute away from buying it but the cheaper Lucas gave me second thoughts.

Looking to get the best bang for my buck so to speak.

 

I've always liked Lucas products and I know quite a few people who swear by them. They do make a fuel injector cleaner.

 

I have heard good things about both. I never noticed a difference when I used the Lucas stuff. I sent my injectors off to be cleaned at some point and they still were operating at 100% even before the cleaning with 200K miles on them.

 

I've only ever seen Techron fuel-injector cleaner, add it to your fuel tank. Sold by Chevron.

Lucas makes several different products, including gear-oil additives & other stuff. It's not like "Lucas" is a single product.