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What oil to use? #819430 10/01/10 09:56 PM 10/01/10 09:56 PM
Joined: Jan 2003 Posts: 353 Chesterfield, MIch C Cuda67 OP super street
Cuda67 OP super street C Joined: Jan 2003 Posts: 353 Chesterfield, MIch	What oil should I be using? I use Valvoline racing oil, but what wt oil. Multie grade or straight wt. Then 10w-30, 10w-40 10w-50? One car is a warmed up 383 and the other is a 472 Hemi with 11.5-1. Thanks Last edited by Cuda67; 10/01/10 09:59 PM.

Re: What oil to use? [Re: Cuda67] #819431 10/01/10 10:02 PM 10/01/10 10:02 PM
Joined: Dec 2004 Posts: 10,554 Rittman Ohio fourgearsavoy I Live Here
fourgearsavoy I Live Here Joined: Dec 2004 Posts: 10,554 Rittman Ohio	I use 20-50 VR-1 oil in my flat tappet engine wit good results Gus 6227938-burnoutpicturegus.JPG (60 downloads) 64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60

Re: What oil to use? [Re: fourgearsavoy] #819432 10/01/10 10:10 PM 10/01/10 10:10 PM
Joined: Jan 2007 Posts: 7,664 IN A ahy master
ahy master A Joined: Jan 2007 Posts: 7,664 IN	It depends on bearing clearnace and other factors. One way to tell is hot oil pressure. I look for at least 20PSI at idle and steady readings above 1500 RPM - around 60 PSI. I'd start with 10W30. That should be plenty for the 383 if clearances are near stock. The other engine may like 15W40 or 20W50 if clearances are bigger. Just make sure the oil you choose has enough zinc for your flat tappet or add ZDPP.

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