When I was 16 years old, I changed the oil one time each in our family cars at the time, a '72 Nova, '69 Stingray, '84 Volvo 740, and '85 Mitsubishi Mirage Turbo, and didn't do it again for almost 30 years.
Since then, I've almost exclusively used quick lube type places, sometimes bringing my own oil and filter to make sure I got exactly what I wanted, other times just getting whatever they had in the correct grade. This technique didn't seem to cause any issues at all; in fact I put 186K miles on a 91 Mercury Cougar XR-7 (5.0 V8) over 10+ years using mostly bulk dino oil every 3 or 4 thousand miles, and it was still going strong when I sold it with the exception of a minor but worsening rear main seal leak.
Fast forward 30 years and I've been changing my own oil (thanks to BITOG) for a few years now. I changed the oil in our Cadillac DTS early this morning (6 qts Castrol Edge EP, 1 can of Liqui Moly Oil Saver, less than 1 qt of M1 0W-40, Fram Ultra filter). It was an oddly satisfying experience watching the old oil drain out and pouring in the new stuff, and I was done in 35 minutes start to finish, including clean up, and putting everything (ramps, tools, etc.) back in their proper place.
Since then, I've almost exclusively used quick lube type places, sometimes bringing my own oil and filter to make sure I got exactly what I wanted, other times just getting whatever they had in the correct grade. This technique didn't seem to cause any issues at all; in fact I put 186K miles on a 91 Mercury Cougar XR-7 (5.0 V8) over 10+ years using mostly bulk dino oil every 3 or 4 thousand miles, and it was still going strong when I sold it with the exception of a minor but worsening rear main seal leak.
Fast forward 30 years and I've been changing my own oil (thanks to BITOG) for a few years now. I changed the oil in our Cadillac DTS early this morning (6 qts Castrol Edge EP, 1 can of Liqui Moly Oil Saver, less than 1 qt of M1 0W-40, Fram Ultra filter). It was an oddly satisfying experience watching the old oil drain out and pouring in the new stuff, and I was done in 35 minutes start to finish, including clean up, and putting everything (ramps, tools, etc.) back in their proper place.
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