Originally Posted by vtecaccord01
Not to bring up an old thread but lately at around 2200 miles I have to add about another qt of M1 to the whip. I saw the STP oil treatment. Would it actually do any harm to motor to use it or don't add it in.
Mobil 1 is good stuff. Dont add anything to it.
FYI, my dads 98 Volvo is now up to 160k on the clock, and running strong.