What kind of oil are you guys using?

[PLY474]

Quaker State Ultimate Durability "QSUD" Full Synthetic 5W30
https://www.walmart.com/ip/Quaker-State-Full-Synthetic-5W-30-Motor-Oil-5-Quart-Single/177257743
https://540ratblog.wordpress.com/about/
https://540ratblog.wordpress.com/

[dodj]

Amsoil Z-Rod 10-30

@Brads70 Why run 20-50? Are all your clearances opened up and are trying to maintain some oil pressure?    Or maybe pull the family 'glamper'? 

[Brads70]

Amsoil Z-Rod 10-30

@Brads70 Why run 20-50? Are all your clearances opened up and are trying to maintain some oil pressure?    Or maybe pull the family 'glamper'? 

Yes engine is built with clearances , engine builder said to use 20w-50
might be the "snow plow"  up front 

[Chryco Psycho]

I prefer to use lighter oil than 20-50 w in stock engines so yes you can use a good oil like Castrol TX & Just add the zinc additive to it .

[Topcat]

Joe Gibbs or Brad Penn

[76orangewagon]

Like mentioned above I have used Brad Penn but I recently switched to BND oil. He will custom formulate oil for your application, give him a call and prepare to be amazed to the knowledge and experience he has in the industry.
http://bndautomotive.com/quantumblue-products-2/quantumblue-lubricant-formulas/

[Northcuda]

I use Penrite 10 Tenths Racing 15W-50 Full zinc + in my 416ci
https://www.penriteoil.com.au/products/10-tenths-racing-15w-50-100-pao-ester

[BIGSHCLUNK]

VR-1