Recent Topics
Tell me about 07 Subaru Tribecas
by ls1mike
55 seconds ago
V-8/chain saw
by CourierDriver
2 minutes 54 seconds ago
5200 miles and pp smelled like fuel
by ram_man
12 minutes 18 seconds ago
5.3L LM7 Lifter Tick Solution
by Hemi_Time
Today at 03:00 PM
What oil to use 13' Ford Explorer?
by dothedrew1202
Today at 02:51 PM
Mower blade - sharpen or replace?
by JHZR2
Today at 02:48 PM
Girl buzzed by me in the Costco lot
by oilboy123
Today at 02:16 PM
Straight Talk Wireless @ Walmart
by Milkman
Today at 02:00 PM
Oil Consumption..Trying Some Pennzoil HM
by Warstud
Today at 01:49 PM
Schaeffer's #132 yellow at the bottom.
by HighMileCummins
Today at 12:57 PM
Brake light not working when lights are on
by ThirdeYe
Today at 12:53 PM
Michelin Tires?
by dslofti
Today at 12:42 PM
Newest Members
kinder, SamBruin7, splatt, Lars65inc, dothedrew1202
51984 Registered Users
Who's Online
108 registered (97tbird, Analyzer, 2010_FX4, 1foxracing, andyd, AITG, 7 invisible), 1908 Guests and 158 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
51984 Members
66 Forums
222528 Topics
3521949 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