ThePermanentProject 0 Posted January 28, 2013 Share Posted January 28, 2013 Considering trying some 80w90 in place of the standard 75w90 in my Celica gen7 gearbox.Anyone had any experience regards doing this? Quote Link to post Share on other sites
armoredfist2002 16 Posted January 30, 2013 Share Posted January 30, 2013 NoBut it's slightly thicker, would stick with the standard,If you put thicker Oil in an engine, when cold you'll get more engine wear, so it would be the same with a gearbox, thicker Oil takes longer to warm up, so more wear on the gearbox internals.I don't know why but Gen 7's usually prefer Red Line MT-90, just from what I've read over the yearshttp://www.opieoils.co.uk/p-1020-red-line-synthetic-manual-transmission-90-mt90-75w-90-gl4.aspx Quote Link to post Share on other sites
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