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Re: what grade of oil do you suggest?
[Re: rebel]
#485839
10/02/09 02:02 AM
10/02/09 02:02 AM
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Joined: Aug 2003
Posts: 43,157
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,157
Bend,OR USA
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I like and use Valvoline 5W20Wt or 5W30 if I can't get the 5W20  One of the reasons is the results of dyno testing thin oil versus standard 30W, I saw a HP gain or loss on the 30W with oil temps. No change on power on the 5W20 or the 5W30 as long as the oil temps are at or above 130F on the 5W30 and no change on the 5W20 no matter what the oil; temps where(all test where done with the outside air temps at or above 70F in the Mojave desert ) This is on all the motors I build and race except when the power gets above 750 HP then it is time for Pennzoil 25W50WT racing oil 
Last edited by Cab_Burge; 10/02/09 11:14 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: what grade of oil do you suggest?
[Re: Cab_Burge]
#485840
10/02/09 03:44 AM
10/02/09 03:44 AM
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Joined: Jan 2003
Posts: 6,266
Renton Washington
Triple Threat
master
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master
Joined: Jan 2003
Posts: 6,266
Renton Washington
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I run 20w50 Brad Penn in my car. Its a bracket car, so if I give up a couple horsepower with the thicker oil I'm not too concerned, I'd rather have the motor live a longer healthier life.
-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
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Re: what grade of oil do you suggest?
[Re: Triple Threat]
#485843
10/03/09 12:01 AM
10/03/09 12:01 AM
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Joined: Aug 2003
Posts: 43,157
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,157
Bend,OR USA
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Quote:
I run 20w50 Brad Penn in my car. Its a bracket car, so if I give up a couple horsepower with the thicker oil I'm not too concerned, I'd rather have the motor live a longer healthier life.
My motor has 4 yrs. of pounding on it , during the spring,summer and some fall weather depending when it snows here  Plus two different dyno sessions with around 35 pulls each session. I have driven and raced it enough, shifting at or above 7000 rpm  , to have two Mopar brand solid roller lifters break the wheels in half. The rod and main bearings look absolutely perfect, the thin oil circulates quicker and my oil temps never exceed 200 F even in slow traffic in the summer Most street motors don't begin to strain most regular motor oils, unless you tune it bad enough to cause the motor to detonate, all bets are off when you make the motor detonate or ping  Remember the two main reasons we use motor oil in our motors is to lubricate and cool, there is no magic in thicker oils
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: what grade of oil do you suggest?
[Re: Cab_Burge]
#485844
10/03/09 01:33 AM
10/03/09 01:33 AM
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Joined: Jan 2003
Posts: 5,484
SoCal
Brian Hafliger
master
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master
Joined: Jan 2003
Posts: 5,484
SoCal
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I also prefer a thinner oil (30wt.) to a thicker oil (50w.) no matter what. If high temps are the norm, then go synthetic and use a quality oil.
We are just now changing over to Torco oil and I hope to have some data soon on how if performs compared to other oils on the dyno.
I would never run a light oil (0w. or 5w.) for HP gains in any of my engines....if you need more HP there are better ways of getting it!
Brian Hafliger
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Re: what grade of oil do you suggest?
[Re: rebel]
#485845
10/03/09 11:11 AM
10/03/09 11:11 AM
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Joined: Jan 2003
Posts: 16,925
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,925
NC
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 Years ago I used to run 20W-50. Then I went to 15W-40. Now I run 10W-30 in my drag race engine. I recommend running a good quality race oil and changing it every 50 passes or 3-4 months; as long as you are not seeing any oil contamination. I use Brad Penn racing 10W-30. If you are running Indy Heads (SR, 440-1) I recommend restricting the oil feed lines to the heads.
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Re: what grade of oil do you suggest?
[Re: 440Jim]
#485848
10/04/09 12:03 AM
10/04/09 12:03 AM
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Joined: Apr 2007
Posts: 325
Greenville, WI
Big B
enthusiast
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enthusiast
Joined: Apr 2007
Posts: 325
Greenville, WI
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What weight oil you use depends largely on oil temp and bearing clearance. A 2owt would work fine up to about 180 30wt up to 200 50wt over 200 A 50wt at 215 degrees has the same viscosity as a 30wt at 180 degrees. I run my car on the street and see 220+ oil temps all the time. If I ran a 5w20 I would have no oil psi. A drag car that never gets above 160 could use a 5w20 no problem.
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Re: what grade of oil do you suggest?
[Re: Big B]
#485849
10/04/09 12:12 AM
10/04/09 12:12 AM
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Joined: Aug 2003
Posts: 43,157
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,157
Bend,OR USA
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My Duster motor has really loose bearing clearances(.0035+  ) and Harland Sharp roller rockers with full time oiling and no restrictors, it has 17 to 19 lbs at 850 RPM at 200 F oil temps with 5W20 WT It does have thirty lbs. at 1200 rpm at 200 F and 65 lbs at 7000 RPM 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: what grade of oil do you suggest?
[Re: Big B]
#485851
10/04/09 12:42 AM
10/04/09 12:42 AM
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Joined: Aug 2003
Posts: 43,157
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,157
Bend,OR USA
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Quote:
Interesting. You must have one hell of an oil pump. I have a set up very close to yours. I also have the pressure fed Isky Red Zone lifters. I think those suck oil psi down too.
My oil pump is either a Mellings high volume or the other make, I can't remember which I did trim the oil bypass spring to lower the pressure when it was on the dyno the first time, it was making peak power at 5600 RPM so I trimmed it to have 65 lbs at 6000 RPM with 5W20 at 160 F After I started racing and testing it at the track I found out that the car would run the fastest when shifted above 7000 RPM I used a set of the new Mopar brand solid roller when I first built it, I have broken two of them since then It now has a set of the early Engle blown alcholol lifters in it I have not ran that motor since replacing the lifters and having the cam repaired this last time, maybe it will get back into the car this winter, maybe not
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: what grade of oil do you suggest?
[Re: Brian Hafliger]
#485853
10/04/09 06:56 AM
10/04/09 06:56 AM
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Joined: Sep 2009
Posts: 257
madison, ohio
modified1090
enthusiast
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enthusiast
Joined: Sep 2009
Posts: 257
madison, ohio
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Quote:
Quote:
What weight oil you use depends largely on oil temp and bearing clearance.
A 2owt would work fine up to about 180
30wt up to 200
50wt over 200
A 50wt at 215 degrees has the same viscosity as a 30wt at 180 degrees.
I run my car on the street and see 220+ oil temps all the time. If I ran a 5w20 I would have no oil psi.
A drag car that never gets above 160 could use a 5w20 no problem.
Not if you have to hot lap the last few rounds....
what about the zinc levels dropping in the oil? i run a flat tappet cam and have heard that the lower zinc in conventional oils can destroy this type of cam. i have been on the lookout for an oil that has the higher zinc at a reasonable price. i just can't see spending $10 a quart for an oil that i am going to change after a month of running.
recently i bought a couple of gallons of lucas 15w-40 long drain truck oil.
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Re: what grade of oil do you suggest?
[Re: modified1090]
#485856
10/04/09 01:48 PM
10/04/09 01:48 PM
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Joined: Feb 2007
Posts: 1,025
Las Vegas, NV
dodgeboy11
super stock
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super stock
Joined: Feb 2007
Posts: 1,025
Las Vegas, NV
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Not saying you guys don't know your stuff, but call Joe Gibbs. http://www.joegibbsracingoil.com/They've spent many many dollars on oils and finding out what works best with different clearances, ring packages, etc... They know their stuff, I got to sit through one of their seminars and I was impressed with the knowledge they had.
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Re: what grade of oil do you suggest?
[Re: dodgeboy11]
#485857
10/04/09 02:00 PM
10/04/09 02:00 PM
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Joined: Apr 2007
Posts: 325
Greenville, WI
Big B
enthusiast
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enthusiast
Joined: Apr 2007
Posts: 325
Greenville, WI
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Quote:
Not saying you guys don't know your stuff, but call Joe Gibbs.
http://www.joegibbsracingoil.com/
They've spent many many dollars on oils and finding out what works best with different clearances, ring packages, etc... They know their stuff, I got to sit through one of their seminars and I was impressed with the knowledge they had.
Joe Gibbs makes excellent oil, but has less detergents. Brad Penn is just as good, is much cheaper, and has a lot more detergents.
My engine builder has used both, and said they are about the same quality wise.
That's why he recommends Brad Penn. I use their 20w50 in summer, and now their 15w40 in spring and fall.
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Re: what grade of oil do you suggest?
[Re: Big B]
#485859
10/04/09 02:10 PM
10/04/09 02:10 PM
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Joined: Apr 2007
Posts: 325
Greenville, WI
Big B
enthusiast
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enthusiast
Joined: Apr 2007
Posts: 325
Greenville, WI
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I can't believe how expensive Joe Gibbs oil is. $174 for a case of 15w50.(14.50/qt)  Brad Penn 20w50 costs me $50. No brainer. If I were to run an expensive oil it would be Mobil one 20w50 v-twin oil. The offshore raceboat guys swear by the stuff, and is probably the most robust oil made...period! It's only 9.50/qt
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Re: what grade of oil do you suggest?
[Re: Bob_Coomer]
#485860
10/04/09 02:11 PM
10/04/09 02:11 PM
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Joined: Sep 2009
Posts: 257
madison, ohio
modified1090
enthusiast
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enthusiast
Joined: Sep 2009
Posts: 257
madison, ohio
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Quote:
Schaffer 5w 50 is some great stuff. Its a fully green synthetic oil..
http://www.schaefferoil.com/engine_oils.html
i believe that Schaffer also makes a conventional oil used for race that is good, i was told that alcohol won't mix with synthetic oil and should avoid. however joe gibbs web site says that there synthetic will mix with alcohol and is good for NOS
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Re: what grade of oil do you suggest?
[Re: modified1090]
#485862
10/04/09 02:20 PM
10/04/09 02:20 PM
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Joined: Apr 2007
Posts: 325
Greenville, WI
Big B
enthusiast
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enthusiast
Joined: Apr 2007
Posts: 325
Greenville, WI
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Quote:
Quote:
Schaffer 5w 50 is some great stuff. Its a fully green synthetic oil..
http://www.schaefferoil.com/engine_oils.html
i believe that Schaffer also makes a conventional oil used for race that is good, i was told that alcohol won't mix with synthetic oil and should avoid. however joe gibbs web site says that there synthetic will mix with alcohol and is good for NOS
Brad Penn 50wt and 70wt oils are supposed to be excellent for alcohol too. Go to their websight and read the testimonials.
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Re: what grade of oil do you suggest?
[Re: Big B]
#485863
10/04/09 03:19 PM
10/04/09 03:19 PM
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Joined: Jun 2009
Posts: 877
ky
68roadrunner
super stock
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super stock
Joined: Jun 2009
Posts: 877
ky
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Quote:
Quote:
Schaffer 5w 50 is some great stuff. Its a fully green synthetic oil..
http://www.schaefferoil.com/engine_oils.html
I thought about running Schaffers oil, but found out it had a lot of molly in it.
I heard that molly can cause roller lifters to skid so I passed.
alot of local racers run schaffers, as a locol machine shop sells it, they have had no lifter problems or skidding. they run 20w50 w/moly
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