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Must be the oil used (synthetic) that seems to be the key. Might also be a viscosity issue as well as I've found that thinner oils tend to not get consumed as fast as thicker oils, depending on the avenue where the oil is being consumed (ie, past the rings or past the valve seals).
Be nice to see a chart of people that have seen oil consumption - what oil they use, maintenance history, transaxle choice, model year, factory where build, driving conditions. Also need a good number of people that didn't have any problems with oil consumption also put in their operating conditions. I'd say a fair number of people that post on boards are looking for info on a problem their are experiencing currently - not many will post to say how great the car is running. Doesn't mean that there isn't a problem - just cannot properly see any trends until you get both sides in the mix because Toyota mentioned the oil consumption issue in a TSB for European 1ZZ-FE engines means that they are aware of an issue.
In my neighborhood - we have a handful of 8th gens spanning the whole generation (1998-2002). Only one of them noted any oil consumption - she also mentioned that maintenance was pretty sparse - just pump gas and go.
Of the later ones - one 2000, two 2001, and my 2002 - all of us run synthetic, have over 100K+ miles and don't have any appreciable oil consumption - half are 4-speed automatics, the other half are 5-speeds - DC Metro traffic, so a good mix of speeds, lots of idling in traffic, high speeds when clear.
Myself, I didn't switch over to synthetic until after the first year I had the car (bought new). That time, I was getting free oil changes at the dealership as part of a promo. After that, changed oil myself with synthetic on an extended drain program. Anywhere from 7500-12000 miles OCI depending on the conditions and what the UOA indicated.
Like they say, YMMV.
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2002 Corolla S, 1.8L 1ZZ-FE VVT-i
2003 Matrix XRS, 1.8L 2ZZ-GE, VVTL-i (RIP)
2009 Matrix XRS, 2.4L 2AZ-FE VVT-i
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