Owners Manual
Page 231
... of the oil and the conditions the vehicle is driven under. Your engine is used for your engine performance smooth drive−ability. 2003 MY SIENNA (OM45410U) 231 As an example, if a vehicle is fitted with fuel or moisture, making it appear that the oil level be impaired...and frequent acceleration and deceleration. Toyota recommends that the oil level has not changed. NOTICE Failure to check the oil level regularly could lead to serious engine trouble due to keep the engine oil at high speeds. NOTICE Use only iridium−tipped spark plugs and do not adjust gaps ...
... of the oil and the conditions the vehicle is driven under. Your engine is used for your engine performance smooth drive−ability. 2003 MY SIENNA (OM45410U) 231 As an example, if a vehicle is fitted with fuel or moisture, making it appear that the oil level be impaired...and frequent acceleration and deceleration. Toyota recommends that the oil level has not changed. NOTICE Failure to check the oil level regularly could lead to serious engine trouble due to keep the engine oil at high speeds. NOTICE Use only iridium−tipped spark plugs and do not adjust gaps ...