P Plumber Joined Oct 23, 2013 Messages 340 Location USA Oct 25, 2013 #61 I throw a bottle of the STP blue in the ratrod looking 54 Plymouth. It keeps the motor sounding like a sewing machine... I did look at the sae50 Valvoline racing oil, but that costs A LOT more than the STP.
I throw a bottle of the STP blue in the ratrod looking 54 Plymouth. It keeps the motor sounding like a sewing machine... I did look at the sae50 Valvoline racing oil, but that costs A LOT more than the STP.
