Paul L

I said in the last week that GM never advised using a 20W-50 oil. I am looking at my 1979 shop manual at the moment and it says 20W-20, 20W-40 or 20W-50 for temperatures from 2OF to 100F. The normal 10W-30 or 10W-40 is for 0F to 100F. My preference is Castrol GTX 10W-40. Apologies.

mountainmotor

Quote:
"My preference is Castrol GTX 10W-40."

Just curious,,why do you prefer that brand of oil? Not making anything of it like I said,just curious what you like about the base oil they use and the additive package.

KENS78SILVERANNIV

Castrol 10w 40w rocks! Why? It's usually on sale. :D

Dalannex

Well because the bottle is real cool looking. :D Everybody knows that. And a lot of the time you can send in for a free t-shirt with a case purchase. :lol:

-Justin

mountainmotor

Ohhhhh! :) So is this heading towards the fact they have a very good Marketing Dept ?

I too like those little motors spinning around without oil in them and all those little molecules bonding on the TV ads.

The FTC did not like something Castrol did though :smash:

Matt Gruber

years ago i read an article, consumer reports?, well, too many years ago to be the current formula, but castrol had something i liked, i think a higher percentage of oil vs. additives.
as i recall it maintained its viscosity or something longer. i think the other oils thinned out sooner.

page62

Mountainmotor, are you imply that Castrol may not be your favorite brand of oil? From reading some of your detailed posts in other threads, I get the impression that one of your currently preferred dino oils is Pennzoil... :boxing

vert2go89

I've used Castrol in all my cars for years and the reason why is because it lasts longer befor breaking down.I had 228,000 miles on my truck and still didnt use a drop of oil between oil changes.In summer I use 20w50 and winter I use 5w30.

mountainmotor

Page62,

No, just interested in hearing success stories is all. I understand that for many years Castrol used rerefined base stock oils,,then used another supplier two years ago and is now using Shell as there supplier of base oils. Just some behind the scene type stuff not commonly known.Kind of like how Castrol claims the Syntec is a Synthetic when in fact it is a group III Mineral oil base with mineral additives

There are many good oils out there these days but I still get a kick out of the "Ace Mechanic" that has tore down many motors that used X brand oil and was sludged up not knowing the prior history of how the car was used or maintained ect. You know,the 1961 Ford bought at a estate sale with only 28k on it but sludged up because of Pennzoil when in fact it was when driven never heated up properly or owner deamed it unreasonable to change because of only minor amount of miles per month ect. Or the motor is sludged up by the use of Pennzoil when in fact it rarely got changed regularly and was tore down because the water pump went out and was driven until it seized and the oil was coked on the heads ect.

You know,the uneducated on base oils and additive packages and colliodal stuff. Yet everyone has a right to their own opinion . Even if it is not Scientificaly based.

Just a fun topic for me but dangerous in terms of possible flame wars. So from now on I will stay with the ring of Tribologists,Chemists and other experts in the field in the online discussions with out debates for the most part .

So no more from me on oils,,it is a slippery subject and causes to much turmoil on forums,,something I try to avoid,,in fact I wish I had not asked why Paul liked Castrol,,,I was not thinking about possible consequences when I posted but cannot delete now can I ?

Paul,I appologize,did not mean anything but to get a success story in terms of the oil has worked for you and change intervals ect

So whats the best oil? The one you all use! :cheers:

gdh

MountainMotor let me be the first to correct you about oils. According to a long time superhero, Popeye is into Olive's Oil. :smash:

Paul L

It seems everyone else answered the questions!

page62

Hey, don't quit educating us now Mountainmotor. I've been following your posts religiously! :yesnod:

And how about that Golden State 30HD ND I can buy at the convenience store for 79 cents a quart? :smash:

mountainmotor

You know it is funny I was at a Dollar general Store awhile back and picked up a bottle of SA Non Detergent oil and on the back label it said benefits:

helps keeps engines clean! ????????????

The API keeps them in the realm of meeting specs,but some oils flat outrun others. It will take a minute but I will post the data of a Shell Synthetic Blend,supposed to be superior to regular mineral based oil right? Then will post Pennzoils specs,plane Hydrocracked mineral based oil" well not so plain,ultra pure as compared to group II's found in Valvoline and some others .Then come back with Mobils new Supersyn Synthetic. If the numbers appear alien,just ask,I will tell you what they mean. Although most times price shopping to save a few bucks is good,I think this will reveal spending less money is better for your car. Pennzoil sells more oil than Valvoline and Havoline combined yearly. But Havoline is no more,it is Shell with Chevron oil in the bottle as soon as the existing supply is gone. Like I said once,what was one oil yesterday,might not be the same tommorrow as many buyouts and the likes are going on.

Shell 10/30 Synthetic blend
Recommended for
Service Categories:
API SL, SJ, SH
ILSAC GF-3

Typical Properties of FormulaShell SB
Test Method SAE 10W-30
Product Code 50211
Viscosity: @ 40°C, cSt @ 100°C, cSt D 445 D 445 68.9 10.6
Viscosity Index D 2270 140
Pour Point, °C (°F) D 97 -36 (-30)
Flash Point, °C (°F) D 92 219 (425)
Neutralization No., D 2986 7.0
Zinc, wt% X-ray 0.109
Sulfated Ash, wt% D874 0.87

TYPICAL PHYSICAL AND CHEMICAL PROPERTIES
PENNZOIL ® MULTIGRADE MOTOR OIL
TEST METHOD TYPICAL RESULTS
SAE Viscosity Grade SAE J300 5W-20 5W-30 10W-30 10W-40
API Service SAE J183 SL SL SL SL
ILSAC GF-3 GF-3 GF-3
Gravity, °API ASTM D-287 35.0 30.4 31.0 30.0
Specific Gravity @ 15.6°C(60°F) ASTM D-287 .852 .87 .87 .88
Pounds per Gallon 7.10 7.27 7.25 7.30
Flash Point, °C(°F) ASTM D-92 229(445) 216(420) 221(430) 213(415)
Pour Point, °C(°F) ASTM D-97 -45(-49) -42(-44) -36(-33) -36(-33)
Color ASTM D-1500 4.0 5.0 5.0 5.0
Viscosity
@ 40°C, cSt ASTM D-445 48.0 60.0 67.0 88.0
@ 100°C, cSt ASTM D-445 8.6 10.5 10.5 13.5
@ 100°F, SUS ASTM D-445 & D-2161 223 290 330 430
@ 210°F, SUS ASTM D-445 & D-2161 54 63 63 75
Viscosity Index ASTM D-2270 158 160 140 153
Low Temperature Viscosity
Vis (cP) at Temperature (°C), Max. ASTM D-5293 <6600 @ -30 <6600 @ -30 <7000 @ -25 <7000 @ -25
Borderline Pumping Temp. (°C),
Max. ASTM D-3829 <-35 <-35 <-30 <-30
High Temperature/High Shear Vis.,
cP ASTM D-4683 2.65 3.1 3.2 3.7
Foaming ASTM D-892 nil nil nil nil
Noack Volatility <15 <15 <15 <15
Corrosion Rating ASTM D-130 1A 1A 1A 1A
Material Number
Bulk 59751 3600 3610 3650

Mobil 1 With SuperSyn™
SAE Grade 0W-40 0W-30 5W-30 10W-30 15W-50
Product Number 48149-9 48116-8 48111-9 48117-6 48120-0
API Service
Classification SL/CF SL/CF SL/CF SL/CF SL/CF
ILSAC GF-3 GF-3 GF-3
ACEA A3/B3/B4-02 A1/B1 and
A5/B5 A1/B1 and
A5/B5 A1/B1 and
A5/B5 A3/B3/B4-02
Gravity, API 33.6 34.5 32.8 30.8 32.5
Specific Gravity 0.857 0.852 0.862 0.872 0.863
Pour Point, °C (°F) -54° (-65°) -54° (-65°) -48° (-54°) -45° (-49°) -45° (-49°)
Flash Point, ASTM D 92, °C (°F) 232° (450°) 232° (450°) 235° (455°) 235° (455°) 255° (491°)
Viscosity Cold Cranking, cP @ °C 4,301 @
-35° 3,800 @
-35° 3,600 @
-30° 3,848 @
-25° 5,234 @
-20°
Cold Pumping, cP @ °C 21,700 @
-40° 23,800 @
-40° 23,900 @
-35° 10,250 @
-30° 14,050 @
-25°
Kinematic, cSt @ 40°C 80.3 54.8 53.7 61.3 124.7
Kinematic, cSt @ 100°C 14.4 10.1 9.7 9.8 17.4
Pumpability Limit, °C (°F) -47° (-53°) -50° (-58°) -46° (-51°) -41° (-42°) -37° (-35°)
Viscosity Index 185 176 169 145 155
Energy Conserving -- Yes Yes Yes --

Now check out this new formulation Mobil has primarily for Diesel Engines but surpasses the tough new SL spec for gasoline and has 1600 PPM of Zinc to boot! High RPM foaming is nil on any oil these days.These oils are formulated with more anti corrosion agents/cleaning agents,great for the Vette that seldom get driven although the Synergyn oil treatment would be a better way to go imo

Delvac 1300-

Mobil Delvac 1300 Super 15W-40
Typical Characteristics
Product Number 44069-3
Gravity, API 29.8
Specific Gravity 0.877
Pour Point, °C (°F) -33 (-27)
Flash Point, °C (°F) 230 (446)
Viscosity
cSt at 40°C
cSt at 100°C 114
15.5
Cranking Viscosity
cP at -20°C 6000
cP at -25°C --
Pumping Viscosity (MRV TP-1)
cP at -25°C 19,000
cP at -30°C 52,000
HT/HS Viscosity, cP at 150°C 4.4
Viscosity Index 143
Sulfated Ash, wt % 1.4
TBN, ASTM D 2896 12
Color, ASTM D 1500 5.0

Ever wonder about STP?

There are many copolymers, but this stuff is STILL a polybutene derivative made from isobutylenes. These fluids have been used for years as an oil thickener and tackifier (as in chain saws and as a chain "stikifier."

Here is some characteristics of the polybutene thickener alone and without any additives:
1. Stable in light and air
2. Effective tackifier/plasticizer
3. Colorless
4. viscosity indices range from 50 for a 4 cSt fluid to 128 for for a 225 cSt fluid.
5. Flash point of 105 to 210 C for ranges of viscosities in 4.
6. practically nontoxic (without additives).
7. Noncorrosive
8. evaporites or burns without residue.
9. Volatility - as high as 32% for 4 cSt grade. Breaks down at 60 C or higher, depending on viscosity.
10. Is soluable in most parafinnic petroleum and synthetic oils.

Typical Applications:
1. Plasticizer, tackifier, clinging agent, and "antithrow" for gear oils and machine applications where "flinging" might occur.
2. Viscosity modifier (thickener) for engine lubricants.
3. adhesives
4. Used in agrichemicals as viscosity modifier
5. Bitumen additive for paving roads to make surface more adhesive for asphalt "laydown."
6. Sealants and putties. (The high vis stuff).
7. 2-cycle additive in petroleum 2-cycle oils to reduce smoke and increase lubricity. Is a competitive base oil for esters in this application.(see "Characteristics" no. 8.).

pulled from another site

Now my personal favorite for street performance. Look at the flash point of the 30wt and compare to any Synthetic made. That with a little Synergyn makes for a fine almost race oil at 1.40 a quart or so compared to high end exotics.
http://www.pzlqs.com/techdata/l7_prodsheet_fs.htm




[Modified by mountainmotor, 5:46 PM 7/26/2002]