Originally Posted By: Astro14
Originally Posted By: silver1
Originally Posted By: friendly_jacek
I posted my experience about it here:
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2489977&page=1
I suspect good synthetic oils or HDEO with prudent OCI would prevent the issue.
Keep in mind that Toyota specified 7500 miles OCI for those years. I did under 5000 miles OCI and still got consumption.
This is interesting how Toyota made the same mistake as GM did with Saturn. You would think they should have known better.
could switching to hdeo & toping off with it slow it down once its started?
Doubt it, because the cause is the oil not returning from the head (I think...not piston holes, but cylinder head return...right?) and a heavier/higher Viscosity oil is going to return just as slowly and sit there just as long by the valve guides that are sucking it in...
Actually the conclusion on the toyota forms is that there are only 2 oil return holes in the pistons, and they are too small and they tend to plug up especially if you use cheap dino oil, toyota's original oci's were 7.5k way too long . That's another factor. Its a design flaw IMO. The 98-02 corolla / prizm should have been recalled! some people have had luck with Mobile 1 high mile 5W30 I Am trying that now !