Toyota has TSB EG018-06 on switching to 5W-20W oil in the 1NZ-FE engine that's in your Echo. The TSB does not recommend 5W-20W oil in any of Toyota's engines before the 2006 model year, and only recommends 0W-20W oil in certain 2006 and newer Toyota engines, not including the 1NZ-FE engine.
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Darrell
Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
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