What kind of oil are you guys using?

[Poolshark314]

Getting ready to do the first oil change in my 73 and the former owner said he used 10w-40 conventional in it. It's a stock 440, so not really sure if the owner's manual direction still applies since it was a 318 originally. Are you guys using synthetic or conventional? Specific weight better than another or just dependent on climate? I have heard Wix filters are the best but seem pretty pricey. Thanks in advance

[blown motor]

Castrol GTX 10W30 with STP oil treatment and a Napa gold filter.

[Cuda_mark]

mopar reproduction oil filter (wix) with brad penn 10-40

[1 Wild R/T]

My car is my baby... I give it baby oil.....

[Brads70]

wix oil filters and Brad Penn oil  20w-50

[mopartaz]

Valvoline VR-1 or Brad penn, or use a zinc additive.

[headejm]

New engine build, 500 mile break-in : Driven BR 15W-50

After break-in period : Valvoline VR1 20W-50

[70vert]

I use Redline 10w40 in my 70/440. It is full synthetic with ZDDP.
Don't recall the filter.

[anlauto]

After break-in period : Valvoline VR1 20W-50

This is what I've been putting in my customer's cars 

[Scooter]

Switched over to Mobil 1 full synthetic a few months back.. no problems.

[Chryco Psycho]

Flat tappet cams Must have extra Zinc
SO Brad Penn or Joe Gibbs oils designed for older flat tappet engines or virtually any oil with a good Zinc additive is a must .
Use a Wix filter .
20 - 50 racing oil is OK If the engine clearances are designed for that weight of oil , if not it is not a great choice as factory clearances require 10-30 or 10- 40

[71383bee]

Flat tappet cams Must have extra Zinc
SO Brad Penn or Joe Gibbs oils designed for older flat tappet engines or virtually any oil with a good Zinc additive is a must .
Use a Wix filter .
20 - 50 racing oil is OK If the engine clearances are designed for that weight of oil , if not it is not a great choice as factory clearances require 10-30 or 10- 40

Hey CP are you stating that for a stock motor not pulled apart that its better to go with a 10W30 or 10W40 with a zinc additive?  I use VR1 on my motors but was always a little worried that it was a bit to heavy for them.  We're talking mostly stock 340 and 318.  When I added the cost up it was cheaper to go with the VR1 but I'm not opposed to going the other route.  The Lucas oil additive is bonkers expensive here and I would like to find a decent substitute. 

For filters I use the Purolator Pure One's. 

[Marty]

Brad Penn.

[bc3j]

WIX oil filter. 10-40 Joe Gibbs conventional oil.

[usraptor]

Lucas hot rod and classic from Summit.  https://www.summitracing.com/parts/luc-10683-1