frontpagemg3 posted Apr 06, 2026 10:31 AM
Item 1 of 2
Item 1 of 2
frontpagemg3 posted Apr 06, 2026 10:31 AM
Costco Members: 4-Pk 5-Qt Kirkland Signature Full Synthetic Motor Oil (various)
+ Free S&H$54 each
$70
Costco Wholesale
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I'm able to easily see that my warehouse doesn't carry most weights and that I'd need to order it online.
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Let assume you have a "good engine". Dirt (silica) from the intake air is the main contributor to engine wear. Second is the build up of combustion byproducts on chains, chain tensioners, oil passages, piston rings, and valves. The third is fuel dilution, especially with short trip direct injected engines. Cheapest and quickest way to remove these contaminants is to drain hot oil out of the engine.
Contamination wear occurs over a long period of time. The cylinder bore is probably shot by the time you notice excessive oil consumption. Car is out of warranty. Too expensive to fix. Buy another car. Rinse and repeat.
I did not touch oil viscosity because a designer can offset the downside of low oil viscosity with higher oil pressure and mass flow rate, both of which require more work (lower operating efficiency). There is no free lunch.
Should I change the synthetic oil every 9 months for driving around 2k miles per year?
Should I change the synthetic oil every 9 months for driving around 2k miles per year?
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Garage, Jack stands, .etc aren't included either
Poster above is says $20 for labor alone.
How about the lifetime of food costs to grow into a person who can change oil. Or the cost of the clothes worn while doing an oil change. And the washing machine and dryer to launder them. Or the bandwidth absolutely wasted on this discussion.
The car is parked in a semi-heated indoor building garage. When it was -10 to -20 real feel in January, the garage temp was low 50s.
Thanks!
EV requires coolant and oil for proper operation. So yet, you will eventually need to replace the old coolant and oil. Rest assure that your lifetime fluid will not fail during the warranty period.
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