I worked in LT. There is nothing in EM products that is significantly different from any other major brand. To be honest, all the technology is supplied by additive companies, who are developing for all the major brands on similar technology platforms. Get whatever has the steepest discount. I usually opt for Kirkland (Warren Distribution, also does Amazon Basics, Wallyworld Supertech, and others). As for fuel, as long as you're putting top tier fuel in the tank, all should be good. Given the nonsense EM has pulled with their employees, I absolutely go out of my way to buy other brands now. Makes me grin a little every time I fill up knowing I'm sticking it to Uncle Darren.