There really is no oil to help you PASS the smog check, however we can
suggest with the high miles your Toyota Corolla has you may want to use a
thicker (heavier weight) oil to help seal the piston rings and reduce
blow-by gases... IF your Toyota has any smoking problems. If there is no
smoke, no compression loss, no significant interior engine wear, you want to
stick with a light oil, one that is going to restrict your engine's rotation
cycles the least; in order words, cause the least internal crankcase
compression.
posted by SmogTips Support
