Lowest Viscosity Index 10w30

[thickvthin]

What would be considerd a lower bound for Viscosity Index of a 10w30 oil and are there any brands that achieve this? What can be guessed about base oils or other properties for such an oil?

 

[Hohn]

Generally, the lower the VI, the cheaper the base oil. It's lower grade, less refined and has less oxidatively stable.

There's not a clean comparison of VI to 10w-30 because VI is calculated from KV40 and KV100 and winter specs are technically independent.

 

[kschachn]

Why would you want a low VI oil?

 

[WeyounDS9]

Why would you want a low VI oil?

It was likely a typo and was meant to mean VII

 

[JavierH19]

Most low vii oils are cheaper made than the 5w-30 and use the less vm as an excuse to use a cheaper base. Only with conventionals do you still get a slightly better oil like valvoline conventional 5w-30 being 2.9 hths and the 10w-30 having a lower kv100 but is 3.1 hths. Only with boutiqes like hpl do you still get the same good base just with less vm added but at the same time better oils use better vm that perform better than the cheap vm of cheap oils. Also not all bases have the same vii. PAO has a natural vii of 125-150 and up to 210 for extra high viscosity mpao but an unaltered group 2 is around 95-115 and with vm added it can be 130 so you'd think it'd be better than pao with a natural vii 140 but it's not.

https://www.kematbelgium.com/portfolio/poly-alpha-olefins/

 

[CleanSump]

HPL 10W-30 NO VII Engine Oil

https://www.advlubrication.com/coll...cts/no-vii-engine-oils?variant=42387398721729

 

[kschachn]

It was likely a typo and was meant to mean VII

That’s been a theme.

 

[thickvthin]

I meant within the synthetic oils and I meant viscosity index. Trying to see if 10w30's VI can shed some light on base oil and how much VII would be present.

 

[Rand]

I meant within the synthetic oils and I meant viscosity index. Trying to see if 10w30's VI can shed some light on base oil and how much VII would be present.

Going about the business backwards. What is the purpose?
The information you seek to know is mostly unknown or inferred unless provided by the manufacturer.

 

[thickvthin]

Going about the business backwards. What is the purpose?
The information you seek to know is mostly unknown or inferred unless provided by the manufacturer.

No purpose lol. Trying to see if any off the shelf synthetic 10w30 has vi less than150 and what can we infer if any from that. Pennzoil Platinum 10w30 has VI of 150. Wondering if another brand has lower than that for synthetic 10w30?

 

[CleverUserName]

I meant within the synthetic oils and I meant viscosity index. Trying to see if 10w30's VI can shed some light on base oil and how much VII would be present.

The discontinued Amsoil ACD SAE 30 did not have VII added and was a synthetic 10w30 in winter rating as well. The VI was 141. https://wisesynthetics.com/products/diesel_oil/acd/

RLI makes a similar product SAE 30/10w30 and the VI is 151. Not sure if RLI uses polymers or if they would tell you if you asked.

Based on the information above, a synthetic 10w30 with no polymers added would be in the range of 141-151 for viscosity index

 

[JavierH19]

I'd say ESP 0w-30 has a 99% chance of outperforming all 10w-30's off the same walmart shelf in shear resistance and noack even though it's a 0w. It has much better polymers and a base that can naturally require less polymers at the beginning.

 

[CleverUserName]

No purpose lol. Trying to see if any off the shelf synthetic 10w30 has vi less than150 and what can we infer if any from that. Pennzoil Platinum 10w30 has VI of 150. Wondering if another brand has lower than that for synthetic 10w30?

Delvac Extreme CK-4 10w30 is 140
Delvac Extreme FE FA-4 10w30 is 140
Amsoil ADN is 147

 

[thickvthin]

Delvac Extreme CK-4 10w30 is 140
Delvac Extreme FE FA-4 10w30 is 140
Amsoil ADN is 147

these appear to be for diesel engines. Do appreciate the info tho.

 

[kschachn]

So why again are you looking for an oil with a low VI? What does that get you?

 

[Japanese]

The full synthetic 10W-30 has VI about 150. Here I posted some of the most popular oils, you can look at their PDS too:
https://bobistheoilguy.com/forums/t...-of-10w-30-full-synthetic.399282/post-7353507

Castrol Edge 10W-30 - VI 149
https://msdspds.castrol.com/bpglis/...04FED6280258CE400445A14/$File/wepp-dkgglm.pdf

Amsoil OE 10W-30 - VI 151
https://amsoilcontent.com/ams/lit/databulletins/g3404.pdf

Valvoline Advanced 10W-30 - VI 152
https://sharena21.springcm.com/Publ...3793b338/35d6eae3-48fd-ea11-b7fc-48df3793b338

Valvoline MaxLife 10W-30 synthetic blend - VI 144
https://sharena21.springcm.com/Publ...3793b338/b1b45538-251b-eb11-b7fc-48df3793b338

Valvoline 10W-30 conventional - VI 135
https://sharena21.springcm.com/Publ...3793b338/f159410c-1d56-eb11-b800-48df3793b338

 

[thickvthin]

So why again are you looking for an oil with a low VI? What does that get you?

Trying to see if data reveals anything interesting.

 

[Plumb Bob]

Trying to see if data reveals anything interesting.

What data?

 

[Japanese]

Trying to see if data reveals anything interesting.

What data?

The data so far from the oils' PDS above shows that conventional oil has lower VI than synthetic blend and full synthetic.

 

[facility1]

Citgo 600 10w-30 has VI 141 ,its a conventional oil,not a blend.good snout oil.and Citgo 700 MFE 10w-30 has a VI at 136. and its a blend.