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Mustang Technical Discussion > Pre 1973 > When do you change your oil after an engine rebuild? > Community Forums > Mustang Forum Australia - Mustang Tech

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When do you change your oil after an engine rebuild? Reply to topic

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mert
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See a few differing views out there... wondering what folks here do.

Poll won't seem to work so...

1 - After break in, then at 100 miles
2 - After break in, then at 500 miles
3 - At 100 miles
4 - At 500 miles
5 - Other...???


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hybrid
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Polls should be fixed now.


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mert
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Now you tell me! Wink2


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xpconnor
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The advice I got was 300-500 miles with break in oil and then dump it for normal oil, no need to do a break. But of course this may be different for an engine with solid lifters that needs the cam broken in. Shaun or someone else on here will know but if no one pipes up give Woody at fataz a call and see what he recommends.


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hybrid
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Cam/lifter break-in is done before the car hits the road. If you don't do it before then, it's probably not going to last long.


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boofhead
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Hybrid is right - first 20 min is the Cam break in (especially important with flat tappet cams) which is not under load (around 2000 rpm slightly varied - no idling). Then you drive the car. I like to drive around 400 ks then change to final oil. Having said that modern rings will very quickly embed hence you can start the engine on final oil which is what the factory tends to do with modern engines. I like to stay with the more traditional way (as I stated above) though I do like to load up the engine to make sure the rings get embedded early.


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