Rusty Rockers

[Waterloo]

That calcium got me, too high, meaning soot, along with the potassium, which could mean coolant... I would not run synthetic in that motor, and would change the oil out every 12,000 miles or less. A good aftermarket remote oil filter would be in order too if you keep the mandate. Amsoil makes a universal one that many guys use here, including Rawze.