break-in oil
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Freshman User
Joined: Oct 2008
Posts: 45
Likes: 0
From: Crocker Mo
break-in oil
hey everyone i've been redoing my truck 1978 F150 4X4,400 engine,C6 auto,full time 4wd. I just rebuilt my engine mods,bored 40,big RV cam,edelbrock 400 performer intake and edelbrock 600 cfm carb. Could someone tell me what break oil or additives I should break the motor in with and how many miles it should take? Thanks for any answers.
Laughing Gas
Joined: Jul 2002
Posts: 843
Likes: 1
From: USA
Get Royal Purple break-in oil and follow the directions. The new oil formulas don't have the zinc and phosphorus content of the old oils and it is really needed for break-in, especially for the cam and lifters.
Freshman User
Joined: Jun 2006
Posts: 29
Likes: 0
I would use 15-40 diesel motor oil. The other stuff doesn't have enough goodies in it that our older engines need! Its a cam thing. Since more and more cars started having overhead cams they forgot about us with push rods and lifters.
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Post Fiend
Joined: Apr 2008
Posts: 8,261
Likes: 15
From: Big Sky Country
The government is cracking down because of EPA regulations but Rotella still has a zinc content of over 1,200 ppm and GM's EOS contains 1/3 more zinc than comp cams assembly lube, will use of one over the other other kill you motor? most likely not, it's just a personal decision.
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Posting Guru
Joined: Nov 2007
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From: Montgomery, IL
yep, that is what I use, plus the Comp Cams break in supplement.