Ok Larry I took your advise and got The Mobil 1 Delvac (synthetic), also what engine flush do you recommend?
We used a little diesel fuel when I was in the service, but hey I didn't pay for it. Thanks!!

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2000 Ford 7.3 Powerstroke 4x4
2006 Mazda Tribute
1983 Black 300 D (donated to charity)
1993 Teal 300 D (160K) Sold
"I love the smell of burnt diesel fuel in the morning, it smells like ....VICTORY"

Semper Fidelis
USMC 1973-1976