Well, I was watching the corny commercial and a few things bug me. First off, the endorsment by the racing guys? Well, the company that owns zMax also has some stake in the racing biz. It wouldn't exactly be difficult to have someone say something good about their product.
Next, the FTC claims can't exactly be taken lightly.
What I'm curious about is this: rather than putting additives in your engine, wouldn't it be advisable to up the viscosity of the motor oil one uses? Such as going to partially synthetic oil or to full synthetics? I'd really like to know, because my '98 Sunfire is up to about 78,000 miles, and I need it to last. Any imput would be appreciated, thanks.
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