Well it is time to share my story. My Monte Carlo was bought new by my grandfather in 74. He only used Pennzoil and Fram (ph30) filters.The oil was changed every 2000 miles and before winter storage. Than in spring he would change it again before driving the car with 0 miles on the oil. He used 10W-30 in spring and fall. And 10W-40in summer, the Monte was NEVER driven in winter. My father bought the Monte in 87 and I bought it in 99 It continued to get only Pennzoil. In 2001 at 110,000 miles I replaced the heads and intake with hi performance parts (2.02 bowtie heads and a edelbrock manifold with a 4BBL).when I opened the engine I was amazed how clean it was no sludge, no carbon. nothing! It was spotless. I was expecting to have to dig out slime to find the head bolts. But that was not what I have found. This should clear up that darn Pennzoil jelly legend.
I still have the Monte and it runs better than ever. Some day I will give it to my son.
I still have the Monte and it runs better than ever. Some day I will give it to my son.