Engine oil or Engine assembly lubricant?

BazGF8

BazGF8

“What’s that noise?” Let it Develop
Staff member
Everyone is saying engine oil is good enough to lubricate new bearings when building an engine ,is this true?
 
Think the use of a mineral/cheaper oil is for the rings to bed in a bit more so than bearings .
You dont clock up 1k miles on the run in oil, around 3 or 400 miles and change it out.
For assembly i would use whatever oil you are planning on using, or just a good oil. Like to try give it good protection on first start up..
Every builder/ owner has different views on run in period and type of oil to use.. I think Millers say to run in on their run in oil only for 300 miles.
 
KENC said:
Think the use of a mineral/cheaper oil is for the rings to bed in a bit more so than bearings .
You dont clock up 1k miles on the run in oil, around 3 or 400 miles and change it out.
For assembly i would use whatever oil you are planning on using, or just a good oil. Like to try give it good protection on first start up..
Every builder/ owner has different views on run in period and type of oil to use.. I think Millers say to run in on their run in oil only for 300 miles.
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Cool man thanks , should have the short block built tonight :subaru: :653:
 
Have heard it said that to be safe mineral oil should be usedfor first 1000 - 1200 kilometres but should be changed every 400 kilometres and inspected for excessive amounts of filings / foreign mater
 
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