[retiredguy123]

Originally Posted by Topspinmo

I do all my maintenance based on conditions. I never every exceeded the oil change intervals. As far as scheduling recommendations I determine based conditions of fluid and environment the vehicle in. On my present car with 71K miles and 12 years old, I’ve changed antifreeze, transmission fluid, power steering fluid, brake fluid not based on miles but time and condition.

I change my battery here in Florida around 5 year mark if it last that long based on evaluation of battery with Ancel BST200 analyze and I can hear the car winding slower when starting knowing the battery getting week.

I worked on cars, heavy equipment, tractors, aircraft engines, lawnmowers, motorcycles, I seen it all.
IMO you HAVE to At least check oil monthly and change oil every year regardless of miles, but that me, I know what it does to insides of engines. If you plan on keeping car for well over the average I suggest you don’t follow maintenance schedules or oil manufacturers recommendations, but base it on conditions. I have to ask why do you trade at 80K? Most vehicles now days will go over 300K miles with limited preventative maintenance? Once most new vehicle leaves lot it drops dramatically in valve every year for first 5 years after that it levels off IMO.

300,000 miles? At 7,500 miles per year, I would be driving a 40-year old vehicle. I think it makes more sense to replace a car more often to take advantage of the newer safety features.