I don't mess with changing sizes etc above spec. If anything I will just get the best quality part available which to me means sticking with Mobil 1 oil filter and K&N air filter as well as OEM parts when it comes time to replacing things. Toyota is not going to put their name on anything they don't stand behind which is more than I can say for places like Autozone, etc. Btw my service advisor tells me to go to the different local toyota dealership websites, see what service specials their running and bring her all the coupons so she can match it. For my mother in laws Avalon (1995 3.0l V6 1mz-fe)I had the Timing Belt, drive belts, waterpump and thermostat replaced total parts and labor $468.81, brake flush $99, power steering flush $70, tune up $60, fuel filter and pcv $148, transmission flush $121 all these are parts and labor

. Anymore questions please don't hesitate to ask. Jon. p.s. what I did what is Microsoft spreadsheet put down the mileage in the leftmost column and next to the mileage put abbreviations, i.e. 160,000 OC RB CA AF EC ATF DF BF PS FI TU FF PCV, etc, etc. My spreadsheet is acting up right now otherwise I would send you a copy of what I already made.