2ZZs are even harder on oil and don't share parts with 1ZZs.quote:
Originally posted by Bill:
I suspect that the Toyota 1.8 liter engines (1ZZ & 2ZZ) in the Corolla's and Matrix, and the Chevrolet Prizms, and Pontiac Vibes may run rich or do shear the oil.
I have run 4 OCIs for more than 11,000 miles, the oil did not thicken during these intervals.
There are threads on BITOG that speak of some engines (Volvo) that run rich (fuel) and possibly thin a host oil or keep a oil from thickening over a long OCI, the 1ZZ may be this type of engine (some more then others).
The 2ZZ engine is newer, and I do not know if this applies to the 2ZZ engine, I have read but do not remember the changes Toyota made to the 1ZZ to make the 2ZZ engine, just a thought.
By the way, these 1.8 liter engines have Timing Chains.
I think the WIX is the best looking air filter for this app. Similar material to the OEM but LOTs more surface area and great quality.