I have a 70 Challenger with a crate 426 465HP engine. What would you recommend for oil to put in that engine?

 

I would put synthetic in it as it provides better wear protection that standard oil. Do you have any pictures of this beast?
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valveoline premium blue diesel , 15w-40, it has zinc in it. its the factory fill for dodges diesel. been useing for 4 years in gas engines. dont let people tell you to not use it in a gas engine, it works fine. i all so use red line engine oil break -in additive, more zinc. who ever you are dont flame me about what i just said. just. just cause i do things different doesnt mean iam wrong. dont evan say it.

 

I use Royal Purple 20w-50 in my Demon, Coronet R/T (440 cid) and just put it in my Coronet Super Bee (383 cid). I use Royal Purple 5w-20 in my Durango (5.7 liter). Royal Purple has zinc in it and is 100% synthetic. I would never use 15w-40 (diesel) as you can use 10w-40 or 20w-50 depending on your climate. My Demon is bored and stroked form a 340 to a 416 and that is what the engine builder recommended unless you drive it in the winter where a lower viscosity would be better such as 10w-40,
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