Scotty back in the early 90's Quaker state motor oil was pretty popular. My volvo dealer used it.…

Scotty back in the early 90's Quaker state motor oil was pretty popular. My volvo dealer used it. Now I hear dealers use basically what their suppliers carry, and castrol is used by many dealers now. I know you like castrol. What's your opinion of quaker state? Still as good? Thanks.

I believe shell oil now owns them, and they make quality oils. The original quaker state oil was the best over a hundred years ago, cause penn oil had good qualities. but those days are long gone with oil additive packages. Everyone uses a mix of blend oils from various sources and various additives

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