Techron is as old, tried, trusted and true as any fuel additive out there. The supposed point behind adding it one tank before you change the oil and then running the tank down is because it tends to flush whatever gunk it cleans into the combustion chamber. I've been using it every 5-10k (probably overkill) in my cars for nearly 2 decades. You really shouldn't need to use it if you're running Shell VPower or BP Ultimate, for example, but even in those cases, every 30k is probably a good idea.

The amount of Techron in Chevron gas, when I read the data on it, is exceedingly low. More of a sales gimmick than anything.

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former: 83 300D, 97 C230, 93 400E

current: 08 C300 Luxury , 92 500SL