Bought My First Plymouth

[chrysler1941]

5 hours ago, Young Ed said:

Also a lot of us have rebuilt engines. So were they rebuilt to 1940s tolerances or more modern specs. Personally I run 10w40 in all my stuff and have over 20k miles on my 48 coupe with no sign of a drop in oil pressure

Yes good question, was rebuilt done at local chevy V8 machine shop, or did they actually get specs form manual. 

You write about oil pressure, it's not about that. It's about wear and tear, the critical first 15 min during warmup. 

 

Tight tolerances = thin oil weight

Greater tolerances = heavier weight

 

Ok I give up. Seems people's reactions are based on feelings instead of logic.  LOL

[BobT-47P15]

Saint.....check your forum mail for a reply about sill plates.      

[knuckleharley]

16 hours ago, chrysler1941 said:

Agree modern oils start thinner and are superior, but ....cold start is what wears engines down. It's the first 10-15 min or so it's essential it receives correct lubrication for bearing etc. These need a friction film. Bearing tolerances are set after oil weight. Now we are only talking about cold start. Our engines need 30w when cold, anything thinner is metal rubbing against metal. 

They had other oil weight. Harley Davidsons from same era run only on 50W. That's how they are designed.

ours are for 30W

It really doesn't work that way. Lube is lube,and the quicker your engine gets the lube,the less wear it will receive.

 

As for Harley's, I happen to know a thing or two about them,having build and ridden knuckleheads,panheads,and shovelheads. The one I have now is the only one that didn't come home in boxes missing a bunch of parts.

 

Comparing the needs of air-cooled engines to water cooled engines is apples and oranges. 

[chrysler1941]

6 hours ago, knuckleharley said:

Lube is lube

LOL

 

Let's agree to disagree ?

[48jumpdoors]

So no Zinc for the Mopar how about the Ford/Merc Flatties?

[Plymouthy Adams]

On 5/28/2021 at 12:54 AM, chrysler1941 said:

 

 

Ok I give up. Seems people's reactions are based on feelings instead of logic.  LOL

 

 

what dad use even before the great war.......preconceived notions or what not.....if they happy with what they using...I am tickled pink..!!

[knuckleharley]

On 5/28/2021 at 11:25 AM, chrysler1941 said:

LOL

 

Let's agree to disagree ?

No disagreement. My statement about lube is lube was related to any type of lube is better than none.

[greg g]

Give member Mark Duggan a shout or check his profile on this site.  He started a face book page for 40s to 40s chryco convertibles.  Don't know how.much traffic it gets but there may be some resources and info for convertible specific issues. 

 

Welcome, enjoy your ride.