My old shop foreman swore by 30 weight in the fuel tank every oil change, and the injectors on my 7.3 lasted 340k

Noah Cooper · 2026-10-11T21:05:04.99793+00:00

I figured he was just old school and it did nothing, but I tore the motor down out of curiosity and the injector tips looked brand new compared to my buddy's truck at 180k that never got it. Anyone else still doing this, or did I just get lucky?

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My old shop foreman swore by 30 weight in the fuel tank every oil change, and the injectors on my 7.3 lasted 340k | Diesel Mechanics - Guest Forum