Recent Topics
Second World War 'Black Devils'
by OVERKILL
12 minutes 41 seconds ago
Windshield washer fluid smells bad?
by Jimmy9190
30 minutes 47 seconds ago
Mixing Oil 5w20 5w30 10w30
by crazyoildude
40 minutes 28 seconds ago
Cheap, used 4x4 SUV.
by HM12460
Today at 08:46 PM
PenFed Auto Loan Question
by Reddy45
Today at 08:22 PM
Volvo transmission drain/ fill question
by dlundblad
Today at 08:18 PM
Buick Rendezvous - LIM Gasket - Ideas?
by Nick1994
Today at 05:50 PM
Online Fax service, anyone use it?
by Rat407
Today at 05:02 PM
Starting problems
by GreeCguy
Today at 04:35 PM
New Air Force One
by JDW
Today at 04:33 PM
Multi-Functional Additive
by MolaKule
Today at 03:34 PM
2015 VW GTI OCI
by Michael58
Today at 03:23 PM
Newest Members
stephen44, car20022004, just1n020, GTWBoss302, RapidRide2
52665 Registered Users
Who's Online
91 registered (2010_FX4, 901Memphis, 01_celica_gt, 74DartSport, 72te27, 5 invisible), 1171 Guests and 178 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
52665 Members
66 Forums
225754 Topics
3592771 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#761083 - 11/03/06 06:14 AM Flashpoint Testing Method ASTM D-92 vs. ASTM D-93
silverbullet Offline


Registered: 10/12/05
Posts: 62
Loc: Northern California
Does anyone know what the difference is in the test methods between the two?

I recently checked the Dino Pennzoil 5w30 flashpoint as 216 deg. F (ASTM D-93) and Pennzoil Platinum 5w30 flashpoint as 196 deg. F (ASTM D-92).

At first I thought, why would the Dino Pennzoil have a that much of a higher flashpoint than their "best" Platinum line. Then I realized the test methods were different. So it led me to the question of what's the difference in the two methods?

Top
#761084 - 11/03/06 08:01 AM Re: Flashpoint Testing Method ASTM D-92 vs. ASTM D-93 [Re: silverbullet]
Blue99 Offline


Registered: 09/27/03
Posts: 2233
Loc: Wisconsin
ASTM D-92 is the Cleveland Open Cup test.

ASTM D-93 is the Pensky-Martens Closed Cup test.

The closed-cup method prevents vapors from escaping and therefore usually results in a flash point that is a few degrees lower than in an open cup.

Base oils typically are 220C+ flashpoints, so it is the volatility of an additive that is producing the lower flash in a fully formulated motor oil.

Top
#761085 - 11/03/06 03:10 PM Re: Flashpoint Testing Method ASTM D-92 vs. ASTM D-93 [Re: Blue99]
Primus Offline


Registered: 07/29/03
Posts: 886
Loc: Kiev, Ukraine
D-93 value is usually about 20 deg C lower than that of D-92


Edited by Primus (11/03/06 03:11 PM)

Top
#761086 - 11/03/06 08:20 PM Re: Flashpoint Testing Method ASTM D-92 vs. ASTM D-93 [Re: Primus]
bruce381 Offline


Registered: 06/23/05
Posts: 3324
Loc: Millbrae, CA
All correct and to add I have always used the PMCC for flash under 200F for light distillates.
bruce

Top