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Oil Grades

Excalibur

By Excalibur
in Celica Club

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Excalibur

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Posted (edited)

I came across this site and found it useful

The first page is on oil grading, but there are 8 or so other pages

[it seems they are upgrading this site - the link takes you to their home page now. Just click Oil and Lubrication on the left]

The rest of the info on this site is very basic, but the oil one is the best Ive seen

www.autoeducation.com/autoshop101/oil-change.htm -

an example;

Abrasive engine wear can be substantially reduced with an increase in filter single pass efficiency. Compared to a 40 micron filter, engine wear was reduced by 50 percent with 30 micron filtration. Likewise, wear was reduced by 70 percent with 15 micron filtration ..."

This site really explains the benefits of a full synthetic oil. But they dont talk about changing to full synthetic from a mineral oil. From my research, this can be done safely up to 100,000 or 120,000k (no guarantees) The problem after this is that mineral oils leave a coating on your moving parts.. a full synthetic will take this coating off. So if your motor is already a little worn you may get too much vibration in your bearings etc.

Edited by Excalibur

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