Quote:
Originally Posted by BMRLVR
First off, to deal with the oils, group III oil technology has come far enough in the last 10 years that many group III oils have superior VI #'s than many fully synthetic group VI & V oils.
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Fully synthetic base oils flow better when cold, heat up quicker and have better thermal stability.
Quote:
Originally Posted by BMRLVR
Second, if an engine were so tight that need to be pre-heated to turn over the friction would sap up a huge amount of power and said engine would be a ticking time bomb.
As a rule race engines are built looser than road engines where rings are considered because of their short service life and lack of emissions control devices that can't handle engine oil contamination. Secondly, since noise is not an issue on race engines a little extra clearance won't matter since a a little noise on startup won't bother a race team.
# 1 reason for warming up oil or running a lighter oil is to protect bearings first and second to ensure the top end gets oil as soon as possible.
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I guess we are talking slightly cross purposes.
Here is a video showing the warm up procedure for an F1 engine and covers the points I was making.