Engine oil, synthetics, shelf life, swapping brands?

[was thatguy]

So I’ve ran Brad Penn partial synthetic since the engine was built.
I ran Royal Purple on the last build with no issues.
Im out of Brad Penn and I have a bunch of unopened Royal Purple but it’s been on the shelf probably 6 years or so.
Would you run it? Would you order more Bead Penn, or would you go buy fresh Purple or other synthetic?
I want to change this today so I can put the boat in the water.
I figure switching brands is better than not changing it at all because it is way past due.

 

[ElAzul]

Shake it up and run it

 

[ElAzul]

Order more Brad Penn, Royal Purple has it's place but way over priced for watered down run of the mill oil compared to some others. I also lump Lucas in the same category when it comes to API oils.

 

[lbhsbz]

Look at the bottles and see if they’d collapsed and started “canning”...if they have, I’d not use it. If the bottles are still shaped like new bottles, I’d run it

 

[was thatguy]

Is Penngrade the same as Brad Penn?
I see conflicting info when googled.

 

[Cdog]

I’ve been told by several people in the oil additive & base oil business that Redline is the best over all product.

 

[ElAzul]

I’ve been told by several people in the oil additive & base oil business that Redline is the best over all product.

They have a lot of PAO/ester based oils are and stout for sure.

 

[Carlson-jet]

Cheap or dirty oil is better than no oil. Clean oil is better than dirty oil. Quality filters keep clean oil from getting dirty.
I find all the rest is preference. The best oils won't stop metal shavings from ruining a engine.

 

[was thatguy]

I got the part number off one of my old Brad Penn bottles.
Ordered a dozen of the same number.
We will see if it’s Brad Penn or Penngrade.

 

[Fun Times]

Recently I was in a bargain store and actually saw an engine oil that suggested a use by timeframe.