quote:
Originally posted by JohnBrowning:
Alan, Your oil consuption has nothing to do with changeing your factory fill at 1230 miles!!! Toyota does not have any lame policy of reqireing/recomeding you to leave the oil in for any predetermined length of time! They are not like Honda and their 5000 mile factory fill break in oil!! Toyota does not use any special break in oil like we see from Honda!
1 quart of oil every 5000 miles for a V6 minivan is well below the industry norm for oil consuption! Break in style, engine design, driveing cycle and oil design are the key things that determine oil consuption! Just so you know most companys use 1 quart per 1000 miles as the established normal oil consuption norm!
It is actualy a better practice to change the initial fill out before 1000 miles. If you read the book titled "Drive it Forever" the engineer/author cites that most accelerated wear has finished by 600-1000 miles. Most remanufactured engines like AC/Delco want the first oil changed out at 500 miles to maintain their warranty. Their is nothing magical about haveing excessive wear metals floating around in the oil! Now with this said if this 1.8 is anything like some of the other UOA we have seen from Toyota's under break-in their really is not that much accelerated wear takeing place.
Alan, Have you checked your PCV system? This can cause an increase in oil consuption. Useing an oil that is too thin reguardless of manufactures recomendation will increase consuption. Useing an OCI that does match the oil and driveing cycle can increase consuption as well. Sticking rings, glazeing and gelling can also casue an increase in consuption. Finaly some engines just use more oil then other engines even if they are the exact same type and model.
Ken4's Toyota dealership in Singapore required a 1000KM oil change initialy to maintain the warranty! So you are not going to hurt your car buy changeing the oil out sooner then the 5000-7500 mile OCI recomended in the book! Second synthetic oil will not hurt it one bit!! Third if you should decide to leave the oil in longer I am preety sure you will not hurt it but it does slightly increase the chances of forign matter embedding in the bearings.