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i used to run nothing but mobil one 5w-30 and a motorcraft filter. Those filters are the same exact thing as a purolater pure one filter. Its just got ford stamped on it. So ill be sticking with that, but after some research im finally switching to red line 30w race oil
 

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Why 20w50?
 

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What do you run ?
That's what im trying to figure out. I have a new dart 363 from fordstrokers and it has a pt88 turbo on it so I need to know a good start up oil then a oil from then on to use. I'm going to start it without the turbo first.
 

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10W30 synthetic.
I figure with a turbo, you want something that is heat stable since it is running thru those superhot bearings
Erich
 

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I have run 15w40 and 20w50 in my car for the last 2 years when applicable, but after doing some research I'm not sure thicker oil is better because thinner oil drains faster/better/easier. This is good for oil trying to get from the heads to the bearings and getting the oil out of ur turbo. I figured thinner oil was bad cause it breaks down easier with the added heat.
 

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What are your bearing clearances? I run 10w30. Running 20w-50 is like pushing molasses through a straw, unless you have wide bearing clearances it isn't needed.
 

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Jersey True Street Guy
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20w 50 Valvoline conventional race oil per the advice of my engine builder.

Ran royal purple before that.
 
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