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Author Topic:   What oil for engine break-in
udecide66
Member
posted May 19, 2004 05:24 PM
I use 5w30 for break in on my motors. and aint had a problem yet. then i switch to my 20w50 VR1 racing eral.


Pickel
Member
posted May 19, 2004 07:39 PM
I use quaker state 10-40 to break my motors in and then go to Kendall 50.


dirtbuster
Member
posted May 19, 2004 08:48 PM
I think it would depend on what type of motor you are breaking in. For a high perf race motor I would use the same oil you race with, something like a Valvoline VR-1 race oil. With the high spring pressures and high compression i personally dont feel the lighter oils offer enough protection.

You shouldnt use synthetic on flat tappet cams becuse it is too slippery and wont allow proper breakin of the lifters and cam. Also it can take longer for the rings to seat properly. WE will usually run the breakin and then 2 nights or so on conventional before switching to synthetic but I know guys that change right after breakin.

copper
Member
posted May 19, 2004 09:22 PM
WHAT DO YOU CONSIDER A GOOD BREAK IN?
ENGINE RUN TIME OR LAPS ON THE TRACK? ANYWAYS WHAT PROCUDERE DO YOU USE WITH CAST STOCK STYLE RINGS,COMPARED TO BETTER RINGS LIKE MOLY ECT? JUST TO CLERIFY FOR ANYONE LOOKING AT THIS.


udecide66
Member
posted May 19, 2004 09:57 PM
30 weight for initial starup/break-in.

20-50 Valvoline for 2 races.

15-50 Mobil 1 after that.

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