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Re: What brand of dino oil do you guys prefer?
[Re: badblack68]
#321824
05/18/09 04:37 PM
05/18/09 04:37 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Rotella diesel oil, I thinks its 15-40. Even the reduced zinc formula is still pretty good
live every 24 hour block of time like it's your last day on earth
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Re: What brand of dino oil do you guys prefer?
[Re: RapidRobert]
#321825
05/18/09 04:39 PM
05/18/09 04:39 PM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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you're about to get 50 replies claiming 50 different brands is best!
I like the rotella stuff too, but at 15w40, I wanted to see if something a little thinner would work for me and save a few HP too, but there's no HD diesel type oil less than a 15w40, so I picked up some royal purple from the local Jegs storefront thats 10w40. haven't run it yet though.
**Photobucket sucks**
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Re: What brand of dino oil do you guys prefer?
[Re: badblack68]
#321830
05/18/09 05:26 PM
05/18/09 05:26 PM
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Joined: Aug 2006
Posts: 247
DuPont, Washington
DZJim
enthusiast
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enthusiast
Joined: Aug 2006
Posts: 247
DuPont, Washington
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Quote:
Here's some info from Caldwells speed shop website.
Q:
I use Rotella or other diesel oil in my classic or high performance car. Doesn't this provide the ZDDP protection necessary for my car?
A:
Diesel oil is engineered with a higher amount of dispersant and detergent to deal with the increased amount of soot and other hydrocarbon by products in a diesel engine. This high amunt of detergent can increase the decomposition temperature of the ZDDP reducing its effectiveness as an anti-wear agent. Diesel engines are manufactured with this issue in mind. Gasoline engines are not.
Typically the viscosity range for diesel oil does not include the very low 5w and 10w values. Tighter bearing clearances in passenger automobiles often require free flowing oil, diesel engines typically have larger bearing clearances minimizing the need for free flowing oils.
Diesel oil is not optimized for film strength as needed in high performance and classic automobiles. For a given viscosity high detergent diesel oil has a lower surface tension and lower shear strength which can cause increased bearing wear, especially in high reving engines.
Diesel oil has metallic based detergents which can cause excessive ash deposits (sludge) in your engine. These deposist in worse case scenarios may cause detonation especially in high compression or supercharged applications.
Newer diesel automobiles are being designed with catalyic converters the implication is that ZDDP levels will be reduced in diesel oil making the discussion a moot point as ZDDP is removed diesel oils will become totally unacceptable.
I don't know who writes for Caldwell's speed shop, but when I got to the last sentence I thought: "pretty strong statement..."
So I looked at Shell's Rotella website and find that their single grade Rotella T is available in 10, 20, 30, 40, and 50 weight viscosities and is API CF-4, and SJ as well as CF and SH. So I looked at the multi-viscosity 15-40 and its a long list including API SM and SL, and they show information that the wear resisting properties of the new formulation are improved over the older stuff.
Now who 'ya gonna believe?  edit: Say, 'ya don't suppose the speed shops sell expensive oil additives and specialty motor oils do 'ya...? 
Last edited by DZJim; 05/18/09 06:10 PM.
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Re: What brand of dino oil do you guys prefer?
[Re: Neil]
#321831
05/18/09 07:43 PM
05/18/09 07:43 PM
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Joined: Jan 2003
Posts: 5,044
At a gas station near you
badblack68
OP
master
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OP
master
Joined: Jan 2003
Posts: 5,044
At a gas station near you
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Quote:
Valvoline 10-40 with a little GM EOS.
I thought about using a synthetic, but it's too expensive for a daily driver + the guy who machined my rotating assembly said it's not worth the extra money and that a good number of racers still use conventional oils. He's done crankshaft work since the early 70's, in addition to drag racing his cars on the side, so he's pretty much seen it all.
Here's what Caldwells says about GM eos:
Q:
What about using GM EOS?
A:
GM EOS contains less than 1/2 the amount of ZDDP as ZDDPLus. The concentration of ZDDP in GM EOS is diluted in a 16 ounce bottle. The proper level of ZDDP for high performance and classic cars is a minimum of 1300 PPM. To do this with GM EOS you would have to use 16-32 ounces of EOS significantly changing the viscosity of your oil and causing possible foaming within the oil.
ZDDPlus is clearly a better choice with one 4 Oz. bottle capable of raising 5 quarts of oil to a level of 1700-1800 PPM.
One 4 ounce bottle of ZDDPlus has the same level of ZDDP as 34.3 ounces of GM EOS.
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Re: What brand of dino oil do you guys prefer?
[Re: 70Cuda383]
#321834
05/18/09 10:34 PM
05/18/09 10:34 PM
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Joined: Jan 2007
Posts: 7,664
IN
ahy
master
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master
Joined: Jan 2007
Posts: 7,664
IN
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Quote:
you're about to get 50 replies claiming 50 different brands is best!
I like the rotella stuff too, but at 15w40, I wanted to see if something a little thinner would work for me and save a few HP too, but there's no HD diesel type oil less than a 15w40, so I picked up some royal purple from the local Jegs storefront thats 10w40. haven't run it yet though.
Shell makes Rotella in 10W-30. Walmart usually stocks it but the parts stores don't.
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Re: What brand of dino oil do you guys prefer?
[Re: 05dakota]
#321836
05/19/09 12:01 AM
05/19/09 12:01 AM
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Joined: Feb 2005
Posts: 4,884
Michigan
MNobody
master
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master
Joined: Feb 2005
Posts: 4,884
Michigan
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Here's the reply i got from Shell about Rotella... With the introduction a couple of years ago of ILSAC specification GF-4 and API specification SM for gasoline-only engine oils, the amount of phosphorous in the oil had to be reduced to prolong the life of catalytic converters. Zinc-based anti-wear compounds, which also contain phosphorous, were reduced as well. These zinc compounds work well to protect flat tappet engines from excessive wear, so the modern gasoline-only engine oils are not as effective in this regard as they once were. Diesel engine oils don't suffer from the same requirements to protect catalytic converters, so the amount of zinc-based anti-wear additives remained high. Products like Shell Rotella T Oils, which also carry API S-series licenses for gasoline engines, have found favor for flat tappet engines. There has been a recent change to the API specification required for oils used in 2007 big rig diesel engines to reduce particulate emissions, API CJ-4. As a result, the zinc content in Shell Rotella T Multigrade Oils has been reduced slightly from about 1400 ppm to about 1200 ppm. Even at these slightly decreased levels, Shell Rotella T Multigrade Oils still have at least 50% more of these anti-wear additives as most current gasoline-only engine oils. These levels of zinc have historically offered good protection in flat tappet applications. Regards, Edward Calcote http://www.shell.com/us/lubricants/
Last edited by MNobody; 05/19/09 12:04 AM.
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Re: What brand of dino oil do you guys prefer?
[Re: MNobody]
#321837
05/19/09 12:10 AM
05/19/09 12:10 AM
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Joined: Feb 2005
Posts: 4,884
Michigan
MNobody
master
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master
Joined: Feb 2005
Posts: 4,884
Michigan
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Here's Castrol
Thank you for contacting Castrol,
The latest API SM/ILSAC GF-4 category calls for reduced Zinc and Phosphorus
levels to allow extended catalyst life in current model vehicles. There
appear to be field issues associated with the SM/GF-4 oil's level of
antiwear in the classic car engines known as flat tappet cam engines. The
current late model passenger car engines are not flat tappet cam engines and
have no reported field issues related to the level of antiwear chemistry in
the SM/GF-4 oils.
Product Recommendations for Flat Tappet (Solid Lifter) Cam Engines:
Castrol Syntec 5W-40 (min Zn = 0.10 wt % = 1000 ppm)(full synthetic)
Castrol Syntec 20W-50 (Recent reformulation identified by "Recommended for
Classic Cars" text on back label) (min Zn = 0.12 = 1200 ppm)(full synthetic)
PREFERRED
Castrol TWS Motorsport 10W-60 (BMW dealerships) (min Zn = 0.10 = 1000
ppm)(full synthetic)
BMW Long Life 5W-30 (BMW dealerships)(min Zn = 0.095 = 950 ppm)(full
synthetic)
New Motorcycle Products, Expected to be Available Q2 2008:
Castrol 4T 10W-40 and 20W-50 (min Zn = 0.10 wt % = 1000 ppm)
Castrol Actevo X-Tra 10W-30, 10W-40, 20W-40 and 20W-50 (min Zn = 0.10 = 1000
ppm)
Castrol Actevo X-Tra Offroad 10W-40 and 20W-50 (min Zn = 0.10 = 1000 ppm)
Castrol Power RS GPS 10W-30, 10W-40 and 20W-50 (min Zn = 0.12 = 1200 ppm)
PREFERED
Castrol Power RS R4 10W-50 and 5W-40 (min Zn = 0.12 = 1200 ppm) PREFERED
Castrol Power RS V-Twin 20W-40 and 20W-50 (min Zn = 0.12 = 1200 ppm)
PREFERED
Existing Motorcycle Products, Will Be Transitioning Out:
Castrol Grand Prix 4-Stroke Motorcycle Oil 10W-40, 20W-50 (min Zn = 0.10 wt
% = 1000 ppm)
Castrol GO! 10W-40, 20W-50 Motorcycle Oil (min Zn = 0.10 = 1000 ppm)
Castrol Consumer Relations
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Re: What brand of dino oil do you guys prefer?
[Re: MNobody]
#321838
05/19/09 12:11 AM
05/19/09 12:11 AM
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Joined: Feb 2005
Posts: 4,884
Michigan
MNobody
master
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master
Joined: Feb 2005
Posts: 4,884
Michigan
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And Kendal
Kendallฎ GT-1 High Performance Motor Oil is a high-quality
engine oil specially designed for use in gasoline-fueled vehicles
operating under high-temperature or severe driving conditions,
such as towing heavy loads, as well as in competition engines
and high-performance street engines.
GT-1 High Performance Motor Oil is formulated to provide
excellent wear protection, to minimize the formation of sludge
and varnish, and to resist viscosity and thermal breakdown, even
in severe service. It also protects against rust and bearing
corrosion, and has good foam resistance. The SAE 20W-50
viscosity grade is fortified with additional zinc
dialkyldithiophosphate (ZDDP) additive to provide enhanced
wear protection and oxidation resistance for use in the most
demanding applications. It is particularly recommended for use in
turbocharged engines and in high-performance engines with
flat-tappet camshafts, especially during the critical break-in
period.
Applications
Gasoline-fueled passenger cars, light trucks and sport utility
vehicles that do not require an ILSAC GF-4 oil for warranty
coverage
Competition engines and high-performance street engines
Nitromethane-fueled drag racing vehicles (Nitro 70 grade)
Gasoline engines where monograde engine oil is
recommended
GT-1 High Performance Motor Oil meets or exceeds the
requirements of:
API Service SM, SL (all grades except SAE 50 & Nitro 70)
Features/Benefits
Excellent resistance to viscosity and thermal breakdown at
high temperatures
Protects against sludge and varnish formation
Excellent wear protection
Protects against rust and bearing corrosion
Good foam resistance
Formulated for engines equipped with turbochargers or
superchargers
Enhanced wear protection for engines with flat-tappet
camshafts (SAE 20W-50)
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Re: What brand of dino oil do you guys prefer?
[Re: badblack68]
#321842
05/19/09 12:36 PM
05/19/09 12:36 PM
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Joined: Sep 2005
Posts: 6,516
Santa Cruz, California
Lefty
master
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master
Joined: Sep 2005
Posts: 6,516
Santa Cruz, California
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Quote:
Diesel oil has metallic based detergents which can cause excessive ash deposits (sludge) in your engine.
Completely not true! My 440 is spotless inside the valve covers. It's cleaner than when it was reassembled after a rebuild. Show me some proof that diesel oil causes sludge. 
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