On Tuesday, March 23, 2021 at 8:08:50 AM UTC-4, trader_4 wrote:


Then there are the fanatics that change synthetic oil every 5K miles or less,
that change the tranny, differential fluid and antifreeze every 20K miles and
only use the official dealer fluid.

I have a friend who drives older vehicles.

Every time he changes his oil, he also pulls the plug on the coolant and the transmission fluid. He doesn't drop the pan or make an effort to get all the fluids out, but he replaces the amount that did drain, and figures about every third times he's replaced it.

It seems to work for him, he gets a lot out of older vehicles.