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rollarun

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  • Toyota Model
    Corolla
  • Toyota Year
    2011
  • Location
    Other Non-Australia

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  • First Name
    Craig

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  1. a Toyota owner’s manual in Australia for 2011 Toyota (with 2ZR-FE engine) has oil recommendations on page 429, https://toyotamanuals.com.au/docs/corolla-owners-manual-apr-10-dec-11/#page=430 Oil Grade: ____0W-20, 5W-20, 5W-30 and 10W-30: API grade SL “Energy-Conserving”, SM “Energy-Conserving” or ILSAC multigrade engine oil ____15W-40 and 20W-50: API grade SL or SM multigrade engine oil ____Then it has a chart with temperature ranges for different oil-weights (0W-20, etc) and principles: use 0W or 5W for starting in cold temperatures, and use 30 (or higher) “if the vehicle is operated at high speeds, or under extreme load conditions.” ____As explained earlier, I’m “trying to solve a mystery” and this information (Toyota recommending “only 0W-20” in USA, but giving options in Australia)* supports the CAFE-Standards theory, but may not prove it because… ____In an American forum, one critic of a CAFE-theory (he supports the FlowingSpeed-theory) claimed that engines in other countries are made differently (with different tolerances, etc) than in USA. He said that Toyota does this so in USA their cars will get better gas mileage. Would it be economically practical for Toyota to do this? Do they develop and manufacture engine-variations, so an “American 2ZR-FE” and “Australian 2ZR-FE” are different, so they require different oils for best protection? ____* The CAFE-regulations in USA state that the oil recommended in owner’s manual must be the same as the oil used in mileage tests, so if Toyota wants higher CAFE mileage (by using 0W-20 in tests) they must recommend the same oil (0W-20) in their owner’s manual.
  2. I live near Los Angeles (thus, Location: Non-Au) and am trying to solve a mystery. When asking “what protects the engine better, a synthetic oil that is thinner or thicker (lighter or heavier, like 0W-20 versus 5W-30)?”, I've read many posts in several USA forums, and have seen two theories: ____One theory claims that Toyota recommends 0W-20 in USA to help its fleet do better for CAFE standards by USA government, re: the required gas mileage for all cars made by a corporation like Toyota. (CAFE = Corporate Average Fuel Economy) To support this theory, some claim that owner's manuals in other countries recommend a thicker oil, and that's why I'm asking about the manual in Australia. ____The other theory is that Toyota's newer engines, beginning in 2009 with 2ZR-FE (and 2AZ-FE), are designed differently than old engines -- with the new engines having closer tolerances, etc -- so that, for best protection, the flowing-SPEED of the oil (0W-20 better) is much more important than its thickness (5W-30 better) because the thinner oil can “get into places” and “cover everything” more quickly and completely.
  3. I have a 2011 Corolla, with 2ZR-FE engine. What oil is recommended for this engine, in Australia? ____The manual in United States says, for 2ZR-FE, “SAE 0W-20 is the best choice for good fuel economy and good starting in cold weather.” If necessary you can use 5W-20, but “it must be replaced with SAE 0W-20 at the next oil change.” And re: the 20, "An oil with a higher viscosity (one with a higher value) may be better suited if the vehicle is operated at high speeds, or under extreme load conditions."
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