Pennzoil conventional oil still available

[cmarshall78]

My local Ace Hardware has it on the shelf

 

[ripcord]

That doesn’t explain why 10w30 and 10W-40 don’t say syn blend on the bottle but 5w30 does. Might it be true?

Probably because they can make a heavier grade oil into a 10w30 from group II stocks without using too much viscosity modifier. For the 5w30 grade they probably need to add some more thermally stable Group III base stocks to get the viscosity index needed.

 

[wemay]

Home Depot has it

 

[AZjeff]

Of course posting 9 shows a 5w30 synthetic blend and a 5w30 with nothing noted.

Must have something to do with the French on the jug. 5w30 all says syn blend here.

Home depot is where I buy the 10w30 hm conventional and the 5w30 says syn blend in store and on line.

 

[Carlostrece]

Probably because they can make a heavier grade oil into a 10w30 from group II stocks without using too much viscosity modifier. For the 5w30 grade they probably need to add some more thermally stable Group III base stocks to get the viscosity index needed.

That's one of the reasons why I use 5w30 High Mileage blend instead of 10w30 High Mileage conventional. I assume the 5w30 High Mileage blend has better based oils, plus likely less wear at cold start.

I used Valvoline MaxLife 5w30 Syn for a decade. It leaked a small puddle on concrete after each drive.

I switched to Valvoline MaxLife Synthetic Blend 5w30 (red bottle). Then it leaked only a few drops after each drive.

Then I had my valve cover gasket replaced. No more leak.

My car isn't an oil burner and only had a minor leak using Maxlife 5w30 High Mileage blend (red bottle). Leak now fixed completely be replacing valve cover gasket.

If my car was an oil burner or a severe leaker, then I'd use a 10w30 High Mileage conventional oil. Likely Pennzoil or Quaker State. Maybe Valvoline. And thicker the better (within grade) @ KV100.

As a last resort, I'd go up a grade in a High Mileage oil. Ideally a conventional. 2nd choice a blend.

 

[RcClockman]

Is Chevron 20w-50 A Conventional or Sem-syn? Its SN rated....

 

[ripcord]

Is Chevron 20w-50 A Conventional or Sem-syn? Its SN rated....

I assume you're asking about Chevron Supreme? Here is the spec sheet.

https://cglapps.chevron.com/sdspds/PDSDetailPage.aspx?docDataId=533194

The spec sheet shows that 20w-50 has a viscosity index of just 126 so it is likely to be all or mostly all Group II or Group II+ base stocks. If there is any Group III included it will be a small fraction of the total.

 

[4wd]

The only Chevron oil I've seen in last 20 years said ISOSYN on the bottle, which an Oreilly store manager told me is Chevron's brand trademark name for synthetic blend. Am I missing something?

That’s on the ESI gear oil and HDEO as well …

 

[Carlostrece]

The good ol’ yellow labeled bottle.

There’s a few other companies that still make conventional oil like Castrol, Chevron, Shell, and Valvoline to name a few. It’s becoming harder and harder to find.

Also Quaker State still offers conventional.

Does Chevron still offer conventional? If it says ISOSYN on the bottle that means it's a synblend, at least according to the manager at my local Oreillys.

 

[ripcord]

Also Quaker State still offers conventional.

Does Chevron still offer conventional? If it says ISOSYN on the bottle that means it's a synblend, at least according to the manager at my local Oreillys.

ISOSYN is mostly just a branding name, but Chevron ISOSYN products typically use Chevron base stocks that are refined to a level in between Group II and Group III so are usually referred to as Group II+. Usually, the term "semi-synthetic" means that some percentage of the base stocks used in an oil are Group III. If a bottle of Chevron oil says "semi-synthetic" on the label, you can be pretty sure it does have some Group III in it. If it doesn't say semi-synthetic but is labeled as ISOSYN, then some or all of the base stocks used will be Group II+.

In most cases, in order for a 0w-20 to 5w30 oil to meet SP or SQ API standards, it will typically have some Group III oil in it, BTW. It's commonly speculated that just about all SP rated oils conventional in those viscosity ranges have some fraction of Group III base stocks in them.

 

[Wireman1987]

I didn't think any company still offered conventional motor oil, but fun fact.. Tonight I noticed on Pennzoil website that Pennzoil still offers a conventional oil in a few viscosities.

Conventional there

 

[Carlostrece]

I should add that in my experience trying 5w30 Chevron Supreme with ISOSYN technology, it was a bit thin for a 5w30 and my oil consumption signifigantly increased (compared to Valvoline MaxLife Full Synthetic 5w30).

Valvoline MaxLife Synthetic Blend 5w30 (red bottle) slowed my oil consumption a lot (compared to Valvoline MaxLife Full Synthetic 5w30).

So IME, Maxlife Blend is a good choice for oil consuming (burning or leaking) cars. I assume (based on data sheets) that Pennzoil High Mileage and Quaker State High Mileage would be even better than Maxlife Blend for reducing oil consumption. I don't know if those lubricate or clean as well as Maxlife Blend, but I think they're pretty good enough.

Valvoline MaxLife Synthetic Blend 5w30 has more syn, less conv.
Valvoline MaxLife Synthetic Blend 10w30 has less syn, more conv.

5w30 Pennzoil High Mileage is a blend with some syn in it.
10w30 Pennzoil High Mileage is conv.

5w30 Quaker State High Mileage is a blend with some syn in it.
10w30 Quaker State High Mileage is conv.

5w30 Oreilly High Mileage is a blend with some syn in it.
10w30 Oreilly High Mileage is conv.

I've read that Supertech also offers conventional oil and High Mileage oil. Maybe also blend? I don't know if Supertech offers High Mileage conventional or High Mileage blend. I don't know much about Supertech. Hopefully someone will explain the Supertech choices that are relevant.

 

[OilStainedNapkin]

I should add that in my experience trying 5w30 Chevron Supreme with ISOSYN technology, it was a bit thin for a 5w30 and my oil consumption signifigantly increased (compared to Valvoline MaxLife Full Synthetic 5w30).

Valvoline MaxLife Synthetic Blend 5w30 (red bottle) slowed my oil consumption a lot (compared to Valvoline MaxLife Full Synthetic 5w30).

So IME, Maxlife Blend is a good choice for oil consuming (burning or leaking) cars. I assume (based on data sheets) that Pennzoil High Mileage and Quaker State High Mileage would be even better than Maxlife Blend for reducing oil consumption. I don't know if those lubricate or clean as well as Maxlife Blend, but I think they're pretty good enough.

Valvoline MaxLife Synthetic Blend 5w30 has more syn, less conv.
Valvoline MaxLife Synthetic Blend 10w30 has less syn, more conv.

5w30 Pennzoil High Mileage is a blend with some syn in it.
10w30 Pennzoil High Mileage is conv.

5w30 Quaker State High Mileage is a blend with some syn in it.
10w30 Quaker State High Mileage is conv.

5w30 Oreilly High Mileage is a blend with some syn in it.
10w30 Oreilly High Mileage is conv.

I've read that Supertech also offers conventional oil and High Mileage oil. Maybe also blend? I don't know if Supertech offers High Mileage conventional or High Mileage blend. I don't know much about Supertech. Hopefully someone will explain the Supertech choices that are relevant.

How much consumption did you have with chevron vs maxlife and at what intervals?

I emailed chevron a few years back and they let me know chevron supreme 5w30 contained over 40% synthetic base stock.

When you say maxlife cleans, which areas of the engine does it claim to clean?

 

[SC Maintenance]

I used Chevron Supreme a fair bit and my VQ didn’t burn any. Just like it doesn’t with other oils.

 

[Carlostrece]

How much consumption did you have with chevron vs maxlife and at what intervals?

I emailed chevron a few years back and they let me know chevron supreme 5w30 contained over 40% synthetic base stock.

When you say maxlife cleans, which areas of the engine does it claim to clean?

I don't remember the exact details of amount of oil usage of Chevron Supreme vs Maxlife, but I do remember it was a noticeable difference. It was years ago.

I didn't say that Maxline cleans up a dirty engine like Valvoline Restore and Protect does. I don't know if Maxlife cleans a dirty engine because my engine was never been dirty. I was saying that my engine never became dirty using Maxlife.

Specifically I'm saying that my relatively clean engine continued to be relatively clean while using Maxlife High Mileage Full Synthetic for 15 years. i.e. - Maxlife did not make it dirty.