Why not a 10w20 or 15w30?

[Lawnfella]

Because nobody would buy it. You have to cater to the majority

 

[Jetronic]

We all know that super wide spans like 5w50 are super vulnerable to shearing out of grade super fast. The modifiers just can't keep the oil in grade for very long.

So with most of America in winter temps above 0 degrees... why not a 10w20 and 15w30, that would have much more longevity?

If I could buy a 15w30 with an HTHS above 3.5 and TBN above 10.... I would buy that stuff til the cows come home. Heck, that is more a 20k oil than anything produced today.

Thoughts?


.....

make true synthetic 30W like you describe, and it'll likely be a 10W-30. You'd have to try hard to make it just a 15W-30, or add some mineral oil.

Look at my sig, what I bought. no VII, 3.3% Noack, 3.5+ hths, tbn around 8.

 

[BigJohn]

Thanks for all the thoughtful replies. Some really great points have been made.

 

[JohnnyJohnson]

If the climate where you live is compatible, but you may have a very limited choice.

 

[Rand]

Poured it in the FJ this past Tuesday and have driven it 230 miles. NEVER, have I had an FJ run this smooth and nice, and this is my second one. I'm sold, don't care what anyone thinks.

TBI over 10.. and HTHS over 3.5

After your recent BRotella 10w30 report Why would you want to use any other oil?
Already looking for the next oil?
Honeymoon over so soon..

 

[Shel_B]

Just because wide spans are subject to shear, does not mean that close numbers keep giving you increased resistance to shear. The fact of the matter is that the hypothetical grades you ask about would offer no additional utility to what is already available.

I'd not call them "hypothetical grades." HPL makes at least one 10W-20, and (quite a few) years ago I used a 20W-40 from Quaker State. Castrol offers a 15W-30 for agricultural use, and there's Delo 400 SD 15W-30 as well as that same grade range from other manufacturers. Even Mobil 1 has a 15W-30 grade, but I've only seen it for sale once.

 

[Shel_B]

There are enough shear stable and high HTHS 5w30s out there that make the need for a 15w30 a moot point

Although it's not moot for certain applications and situations, and there's a reasonable number of such products on the market filling the need.

 

[Shel_B]

High Performance Lubricants makes a PCMO 10W-20 and Euro 10W-20, both no VII. Their PCMO SAE 30 (also no VII) just missed the limit for a 10W-xx making it a 15W-30. The PCMO 10W-20 has a Noack of 3.8% with no shear. They also make a no VII 5W-20, 5W-30, and 10W-40. Note though, the performance of these oils is more a testament to HPL's standards than it is to those grades.

I remember having that conversation here with Dave back some time ago.

 

[TomYoung]

I'd not call them "hypothetical grades." HPL makes at least one 10W-20, and (quite a few) years ago I used a 20W-40 from Quaker State. Castrol offers a 15W-30 for agricultural use, and there's Delo 400 SD 15W-30 as well as that same grade range from other manufacturers. Even Mobil 1 has a 15W-30 grade, but I've only seen it for sale once.

I am okay with using a different term like “fringe” or “recondite.”