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
Get Deal at RetailerGood Deal
Bad Deal
Save
Share
Leave a Comment
Top Comments
I'm able to easily see that my warehouse doesn't carry most weights and that I'd need to order it online.
294 Comments
Sign up for a Slickdeals account to remove this ad.
Does the oil in the bottle expire?
Short 3-5 mile trips = severe duty = 3K oil change interval. Don't worry about oil expiration. Internal combustion engines work best and last a long time when you run them at highway speed with fluid at normal operating temperature (Italian tune-up).
Sign up for a Slickdeals account to remove this ad.
Remember, you could be setting in your car for hours and not move a single inch with the oil still being use. Better measure would be hours of use vs miles used. An example would be, my wife would drive 1 miles to pickup the kids (5 mins) and idle for 20 minutes waiting for them to come out and the return trip home.
If the oil is doing what its designed for going to 10,000 miles should be fine. One way to to be certain is if you drive "normal" if not then change sooner 7,500 is a sweet spot. It still costs time and effort to change oil BTW. One Certain way to be sure is to get a used oil analysis (Blackstone) for under $40 to be Sure.
I used to do 5000 OCIs and have gone up to 7500 and even tested at 10,000 and the testing came back indicating that the oil was still with spec to go longer. The only variable is driving conditions heat/cold along with your oil filter and time.
Shahhere
I recently adjusted my valves on my 15 year old Honda and the vallve train looked great inside, with no varnish, deposits or sludge. That's what I wanted out of 5K OCI. And I have the peace of mind knowing it'll easily last another 100K miles, for me or the next owner.
For $600 in oil changes over 15 years, that was money well spent, IMO.
As a Slickdealer, I was getting the oil "Free After Rebate" for the majority of that time, so I didn't actually even spend $600. It was Free, just the cost of filters.
I've seen plenty of engines after 10K OCI and they usually look like crap inside once they get over the 100K mark, (ie out of warranty) .
Sign up for a Slickdeals account to remove this ad.
Leave a Comment