Recent Topics
Opinions On This Laptop
by BlueOvalFitter - 07/05/20 08:02 PM
Anyone else see Hamlin hood flap fly out?
by 555 - 07/05/20 07:54 PM
Husqvarna AWD with a Honda engine
by yeehaw1960 - 07/05/20 07:02 PM
Recommended car shipper?
by HawkeyeScott - 07/05/20 06:10 PM
My 2011 Sonata SE 2.0T
by strongt - 07/05/20 05:39 PM
Throwing in the towel on local clothing retailers
by Reddy45 - 07/05/20 05:09 PM
Castrol Edge vs Edge EP
by Gene K - 07/05/20 05:03 PM
Car related YouTube channels
by dishdude - 07/05/20 04:59 PM
Suspension Bushings Oil Resistant?
by TacoFergie - 07/05/20 03:43 PM
Building a solar generator
by BeerCan - 07/05/20 03:22 PM
Used CVT fluid in a power steering application
by mahanddeem - 07/05/20 02:06 PM
New Mobil1 EP HM, API SP label design.
by wemay - 07/05/20 02:00 PM
Generator oil
by Eddie - 07/05/20 01:51 PM
This never ceases to amazing me
by SLO_Town - 07/05/20 01:46 PM
Empty shelves and lack of variety.
by sloinker - 07/05/20 01:17 PM
Mann HU816 (28 month service)
by Barwich - 07/05/20 12:23 PM
Napa Gold 1348 and Mahle OC148 C&P
by BeerCan - 07/05/20 10:38 AM
Newest Members
Turboman92, TrustyAutos, TacoFergie, electro, SilentC
71852 Registered Users
Who's Online Now
107 registered members (2010Civic, 72te27, 18LateModelFan, 14Accent, 4WD, 11 invisible), 1,916 guests, and 24 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics307,462
Posts5,311,615
Members71,850
Most Online4,538
Jan 20th, 2020
Donate to BITOG
Print Thread
Hop To
viscocity modifier #5456602 06/18/20 07:06 AM
Joined: Aug 2009
Posts: 142
B
bonjo Offline OP
OP Offline
B
Joined: Aug 2009
Posts: 142
I am aware of the product being added to mineral oil to widen the temperature viscocity range of the base oil.

But not sure what the situation with full synthetic oild is. ???
Do they still have these added or not? Is it the same for all brands?

I am only talking about viscocity modifier not other addtivies

Re: viscocity modifier [Re: bonjo] #5456618 06/18/20 07:27 AM
Joined: Sep 2005
Posts: 4,229
Z
Zaedock Offline
Offline
Z
Joined: Sep 2005
Posts: 4,229
What is your definition of "Full Synthetic"?
Have you read through the Main page of the forum website?

Motor Oil University.

https://www.bobistheoilguy.com/motor-oil-101/


2019 Escape EB AWD/2016 KIA Optima SXL 2.0L Turbo/2012 F150 Ex-cab 5.0L
1992 YJ "The Heep"/2015 Chrysler 200 Limited
1975 Ford Bronco/1959 Willys CJ5/Tube Rock crawler
Re: viscocity modifier [Re: bonjo] #5456624 06/18/20 07:31 AM
Joined: Dec 2005
Posts: 14,462
K
kschachn Offline
Offline
K
Joined: Dec 2005
Posts: 14,462
And the answer is yes they do, except in some very limited circumstances and brands.


1994 BMW 530i, 253K
1996 Honda Accord, 289K
1999 Toyota Sienna, 437K
2000 Toyota ECHO, 290K
Re: viscocity modifier [Re: bonjo] #5458048 06/19/20 08:11 PM
Joined: Jun 2002
Posts: 21,226
MolaKule Offline
Global Moderator
Offline
Global Moderator
Joined: Jun 2002
Posts: 21,226
Quote
...Viscosity Index Improver or Viscosity Modifier (Performance Additive): Olefin copolymers (OCP's), hydrogentated styrene-diene copolymers, styrene esters, polymetharylates (PMA's), mixed alkyl methacrylate-vinyl-pyrrolidines, aminated ethylene propylene, mixed alkylmethacrylate ethylene/propylenes; reduces viscosity change with temperature. Increases viscosity of base oil as temperature rises when base oil tends to thin. Some VII's may also act as dispersants by incorporating dispersant compounds.


https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/530321/Additives_XII-Multifunctional_

As kschachn stated VII's are used in synthetic formulations as well as conventional (mineral) oil bases.

The exception is in very specific cases where the mix of fully synthetic base oils give rise to the proper viscosity index without any VII's.

Last edited by MolaKule; 06/19/20 08:17 PM.

"So many shows out there dumb-down the country. It's so admirable to be part of a show that wants people to think." (David Krumholtz 'Charlie Epps' of NUMB3RS)
Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™