Break in oil - The 1947 - Present Chevrolet & GMC Truck Message Board Network

crites_72 · 06-13-2009, 10:45 AM

ok i know theres a thread on here some where, i just cant find it. whats everyones oppinion on the best break-in oil and/or additive?

71STPSDE · 06-13-2009, 11:12 AM

Lucas Oil and Royal Purple make break in oil. My builder used Rotella oil. They all have the zinc that todays oils don't put in the oil anymore. Hope that helps.

k5hart · 06-13-2009, 11:18 AM

Honestly, and I'll probably get a lot of flack about this, I just used Castrol 20/50 on the motor I just built. Granted I used a lot of cam and moly lube while putting it together. I primed the heck out of it too before firing. After that I put in 20/40 Valvoline VR1. It's supposed to have more zinc content although there is great debate over that as well. No problems yet.

Shyguy · 06-13-2009, 11:27 AM

I am not sure how many engines my son has built in his lifetime, 6 or so in the last few years I know of and always uses Rotella 15-40.

Danny

GMC406 · 06-13-2009, 11:35 AM

Agree Rotellla 15-40 is the best you can get, break it in and run it with that oil. It takes alot better care of your engine. As long as there is no Catylitic Converter the extra zinc in it makes it the best you can use IMO.

jbarron · 06-13-2009, 09:50 PM

Rotella no longer has the high zinc content it use to have. Try the Delo stuff instead. Add some GM EOS breakin lube or other such product for breakin.

ll____b0t____ll · 06-13-2009, 10:10 PM

I used the Rotella 15-40 and hopefully if thers no more steal fillings in the next oil change Ill be going forward to Castrol Syntec oil ...Yeah.

My last 400 SB went 280 thousand miles and 14 years and some of that was teenage its a racer miles lol.
If my new engine makes as good a show as that one ill swear by the break in process I was told by my father , and never missing an oil change with Syntec

67shortie · 06-14-2009, 03:29 AM

Try DELO 400 15/40 and a bottle GM EOS

Never lost a cam with this combo

ZombieWeinerDog · 06-14-2009, 09:39 PM

i went and used regular valvoline 10w 30. it works fine runs awesome never heats up, but there is an oil leak coming from the timing cover

**El Jay** · 06-15-2009, 02:04 AM

We've always broken them in on whatever was going to be used in the engine after the break in.

06-13-2009, 10:45 AM	#1
crites_72 Registered User Join Date: May 2008 Location: Mtn. Grove Mo. Posts: 155	Break in oil ok i know theres a thread on here some where, i just cant find it. whats everyones oppinion on the best break-in oil and/or additive? __________________ DJ

06-13-2009, 11:12 AM	#2
71STPSDE Registered User Join Date: Jun 2006 Location: San Antonio, TX Posts: 296	Re: Break in oil Lucas Oil and Royal Purple make break in oil. My builder used Rotella oil. They all have the zinc that todays oils don't put in the oil anymore. Hope that helps. __________________ 71 Chevy Stepside 377/350

06-13-2009, 11:18 AM	#3
k5hart Registered User Join Date: Nov 2002 Location: Charleston, South Carolina Posts: 1,370	Re: Break in oil Honestly, and I'll probably get a lot of flack about this, I just used Castrol 20/50 on the motor I just built. Granted I used a lot of cam and moly lube while putting it together. I primed the heck out of it too before firing. After that I put in 20/40 Valvoline VR1. It's supposed to have more zinc content although there is great debate over that as well. No problems yet. __________________ 2006 Silverado CCSB, 1939 Ford Sedan, 1962 BelAir Wagon, 1976 Vega Panel Charleston, South Carolina

06-13-2009, 11:27 AM	#4
Shyguy Junior Member Join Date: Dec 2006 Location: Southeast Missouri Posts: 2,436	Re: Break in oil I am not sure how many engines my son has built in his lifetime, 6 or so in the last few years I know of and always uses Rotella 15-40. Danny __________________ '67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E.

06-13-2009, 11:35 AM	#5
GMC406 Professional Grade Join Date: May 2009 Location: Hill City KS Posts: 366	Re: Break in oil Agree Rotellla 15-40 is the best you can get, break it in and run it with that oil. It takes alot better care of your engine. As long as there is no Catylitic Converter the extra zinc in it makes it the best you can use IMO. __________________ 61 GMC 9' Step Someday it will be a build http://67-72chevytrucks.com/vboard/s...=1#post3356828 67 C-30 Red Dale motorhome http://67-72chevytrucks.com/vboard/s...31#post3845531 71 GMC Street performer in the works Waiting for warm weather http://67-72chevytrucks.com/vboard/s...d.php?t=341946 1990 GMC Sierra GT-sold 1983 chevy 4x4-project on hold maybe sell 1969 Triuph GT 6- sold 1996 Ford I-6 5 Speed 4x4 2004 Dodge Intrepid- milage maker 1959 Ford Fairlaine, factory a/c 292Yblock- sold 1982 Honda XL500R Always lookin for other old trucks!

06-13-2009, 09:50 PM	#6
jbarron Registered User Join Date: Apr 2006 Location: Spring, Texas Posts: 167	Re: Break in oil Rotella no longer has the high zinc content it use to have. Try the Delo stuff instead. Add some GM EOS breakin lube or other such product for breakin. __________________ '72 3/4 Cheyenne Super 402/TH400 Gear Vendors '72 3/4 Cheyenne Super 350/200R4 '50 1/2 Chevy 3 Window

06-13-2009, 10:10 PM	#7
ll____b0t____ll Registered User Join Date: Dec 2008 Location: Cody Wyoming Posts: 238	Re: Break in oil I used the Rotella 15-40 and hopefully if thers no more steal fillings in the next oil change Ill be going forward to Castrol Syntec oil ...Yeah. My last 400 SB went 280 thousand miles and 14 years and some of that was teenage its a racer miles lol. If my new engine makes as good a show as that one ill swear by the break in process I was told by my father , and never missing an oil change with Syntec

06-14-2009, 03:29 AM	#8
67shortie Green club Join Date: May 2002 Location: Central CA Posts: 1,059	Re: Break in oil Try DELO 400 15/40 and a bottle GM EOS Never lost a cam with this combo __________________ 71 short/fleet ECE 4/6 drop, LQ4/700r4/3.42 gears 70 SS396 Chevelle 427/200-4R/3.73posi 61 Lincoln Continental, black on black Son you are going to drive me to drinkin if you don't stop drivin that hot rod lincoln

06-14-2009, 09:39 PM	#9
ZombieWeinerDog Registered User Join Date: Oct 2008 Location: Sparta, MI Posts: 446	Re: Break in oil i went and used regular valvoline 10w 30. it works fine runs awesome never heats up, but there is an oil leak coming from the timing cover __________________ 1972 longbed- 454 1967 shortbed- 355

06-15-2009, 02:04 AM	#10
El Jay Gone to greener pastures Join Date: May 2007 Location: Gateway to the Delta Posts: 7,354	Re: Break in oil We've always broken them in on whatever was going to be used in the engine after the break in. __________________ '69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck



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