I have a 1996 Chevy P/U that
I have a 1996 Chevy P/U that I bought new. It now has 143,000 miles. I put Amsoil 0W-30 and an Amsoil filter in it at 1000 miles. I change the oil and filter at once a year or 25,000 mile. I've done this for 25 years. The oil has never gone below the full mark on the dipstick for those 25 years. I also have a Toyota Avalon that I bought new in 2007. It now has 195,000 miles. Did the same thing with it. Has never used any oil.