Is it not a good idea to buy freshly blended oil?

[JohnnyJohnson]

When it comes out of the earth after what a million years someone adds a couple substances to it and now its fresh.

 

[rstcso]

When it comes out of the earth after what a million years someone adds a couple substances to it and now its fresh.

"New and improved!"

 

[mikeduf]

Personally I prefer a little aged and let it aerate for a while.
But the smell is a good clue as to how fresh the additives are.
At least to my Discerning nose!

 

[wlk]

Why would you use 20 year old oil?

Bc it's there and needs to be used up. Ran 20+ yo Pennzoil yellow bottle oil in my old SBC 350 just fine for 3-5k miles, can't remember the exact length. Ran 10yo oils in it and some other engines I was given and would use both again without hesitation. Pour half in, shake the heck out of it until the additives suspend again, fill it up, and go about your day. Yes, I watched his video, and yes, I agree it technically does degrade, but I'd still do it again without hesitation. Waste not, want not, my friend, that's money sitting there.

 

[Patman]

Bc it's there and needs to be used up. Ran 20+ yo Pennzoil yellow bottle oil in my old SBC 350 just fine for 3-5k miles, can't remember the exact length. Ran 10yo oils in it and some other engines I was given and would use both again without hesitation. Pour half in, shake the heck out of it until the additives suspend again, fill it up, and go about your day. Yes, I watched his video, and yes, I agree it technically does degrade, but I'd still do it again without hesitation. Waste not, want not, my friend, that's money sitting there.

I agree with this theory as well, which is why I am using 7 year old ESP Formula 5w-30 in my Vette right now and it’s why I will be using the Fram Endurance that I already bought for it, on the next interval. If I paid for something like this I want to get my money’s worth from it.

 

[cheesepuffs2]

I agree with this theory as well, which is why I am using 7 year old ESP Formula 5w-30 in my Vette right now and it’s why I will be using the Fram Endurance that I already bought for it, on the next interval. If I paid for something like this I want to get my money’s worth from it.

You're talking about using oil that the manufacturer says has aged out, to save what, $50 in oil, in your car that MSRPs at about $68k USD. I don't understand the economics of that, but I understand it's just a different approach and not my engine regardless.

 

[Patman]

You're talking about using oil that the manufacturer says has aged out, to save what, $50 in oil, in your car that MSRPs at about $68k USD. I don't understand the economics of that, but I understand it's just a different approach and not my engine regardless.

The 7 year old ESP Formula in my Vette right now is actually a better oil than what’s sold today anyway. I wish I had more of it actually. This version had a lower Noack, less sulfated ash and a slightly higher HTHS number. I don’t think that this oil has “aged out” Do you seriously think that it’s going to damage my engine?

 

[Carlostrece]

See, if you buy a jug of milk that is good for one month, it's not like the milk will wait for one month and then suddenly go bad. It goes bad gradually. Is oil like that too? They say that oil is good for up to 4 years, but it's not like the oil will wait for 4 years and then suddenly go bad. Shouldn't we buy fresh oil from Walmart each time we change our oil? Pennzoil jugs at Walmart right now say June 2025 on the jug. In a couple of months it will probably say August 2025. Walmart sells so much oil, jugs vanish.

I heard 5 years motor oil storage is OK, but that's splitting hairs. I've had the same thought as you. I buy my oil within 1 month of use partly for the reason you mention, but also because I have limited storage space, and I consider the time value of money. Buying something on sale long before you need it is false economy because of the time value of money. However, buying something on sale within 1-2 months of using it is a win. IMO

 

[Carlostrece]

When it comes out of the earth after what a million years someone adds a couple substances to it and now its fresh.

It's the additives that eventually go bad in storage or use.

 

[Javed]

ESP lovers that don't care about freshly blended oils should hold a lot of it now. Maybe Mobil 1 will ruin the formulation to make more money. I read that Pennzoil did it to PUP. Red Line 0W-20 is also not the Red Line of 10 years ago.

 

[kschachn]

It's the additives that eventually go bad in storage or use.

I’ve never heard they “go bad”. We’ve had reports of sometimes they will precipitate out, but I don’t know what mechanism would cause them to go bad.

 

[Javed]

I’ve never heard they “go bad”. We’ve had reports of sometimes they will precipitate out, but I don’t know what mechanism would cause them to go bad.

Aren't they chemicals? How come things like toothpaste go bad then?

 

[Javed]

I have heard even gasoline goes bad.

 

[Carlostrece]

I only change my Buick's oil every 3 years because I only drive 400 miles a year and my car is stored in a heated garage, which means the coldest start it ever gets is 60F. Also, my car goes for one 30 min highway drive per month. As a result of those factors, my oil only has 1200 miles on it after 3 years, and it still looks and smells clean. When my valve covers were off recently (to replace gaskets) the valvetrain looks clean.

So my 3 year OCI has been working well for my situation. I'm considering increasing my OCI to 5 years.

Having said all that... I wanted the freshest oil possible when it goes into engine because it's going to be in the engine for years.

I’ve never heard they “go bad”. We’ve had reports of sometimes they will precipitate out, but I don’t know what mechanism would cause them to go bad.

IIRC Lakespeed said the detergent can go bad from years in storage. He also mentioned oxidation and precipitation of additives. He showed visual examples and VOAs. I'm not a chemist. I'm just recalling what he said.