| I've watched a Valvoline commercial few months ago where Valvoline technicians highly recommend adding one of their Valvoline injector cleaners at 75,000 miles.
Is it really necessary though? I like the assurance that the product will help remove chemical buildup and what not but is it true? Why doesn't our car manual say anything about injector cleaners in the maintenance section?
Doesn't the engineers from the automaker know best of what is good for our engines? |